AT&T 555-540-200 Issue 1, September 1989 AT&T System 25 Release 3, V 3 Reference Manual
TO ORDER COPIES OF THIS MANUAL (INCLUDES ADDENDUM) Call: AT&T Customer Information Center on 1-800-432-6600 In Canada Call 1-800-255-1242 Write: AT&T Customer Information Center 2855 North Franklin Road P.O.
FCC NOTIFICATION AND REPAIR INFORMATION AT&T SYSTEM 25 This telephone equipment is registered with the Federal Communications Commission (FCC) in accordance with Part 68 of its Rules. In compliance with the Rules, be advised of the following: MEANS OF CONNECTION Connection of this telephone equipment to the nationwide telecommunications network shall be through a standard network interface USOC RJ21X jack.
REPAIR INSTRUCTIONS If you experience trouble with this telephone equipment, contact the AT&T National Service Center on 1-800-628-8888. The Telephone Company may ask that you disconnect this equipment from the network until the problem has been corrected or until you are sure that this equipment is not malfunctioning. RIGHTS OF THE TELEPHONE COMPANY If your telephone equipment causes harm to the telephone network, the Telephone Company may discontinue your service temporarily.
FCC WARNING STATEMENT Federal Communications Commission (FCC) Rules require that you be notified of the following: ● This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause interference to radio communications.
Common carriers are required by law to collect their tariffed charges. While these charges are fraudulent charges made by persons with criminal intent, applicable tariffs state that the customer of record is responsible for payment of all long-distance or other network charges. AT&T cannot be responsible for such charges and will not make any allowance or give any credit for charges that result from unauthorized access.
CONTENTS CONTENTS Section 1—Overview Section 2—Features and Services Section 3—Functional Description Section 4—Hardware Description Section 5—Technical Specifications Section 6—Environmental Requirements Section 7—Parts Information Section 8—Reference Documentation Section 9—Glossary Section 10—Index
OVERVIEW Introduction 1-1 Organization 1-1 System 25 Description 1-1 Call Handling Capabilities 1-4 Safety 1-4 Business Communications Needs 1-5 Incoming Business Communications 1-5 Outgoing Business Communications 1-7 Internal Call Movement 1-9 Data Communications 1-10 Growth & Rearrangement 1-13 Conclusions 1-14 -i-
Figures Figure 1-1.
OVERVIEW OVERVIEW Introduction This reference manual provides general technical information on AT&T System 25 (System 25). It includes a description of the system, its hardware and software, features and services, environmental requirements, and technical specifications. This manual is intended to serve as an overall technical reference for System 25. This manual is released specifically to cover Release 3 (R3) of System 25.
OVERVIEW CALL ACCOUNTING SOFTWARE OR RS232 CONTROL COMPLEX SMDR PRINTER SYSTEM ADMINISTRATION TERMINAL OR MS-DOS PC WITH ADVANCED ADMINISTRATION INTEGRATED SOLUTION RS232 RS232 ● ADVANCED ADMINISTRATION ● CALL ACCOUNTING SOFTWARE ● OFFICE AUTOMATION SOFTWARE ● VOICE MESSAGE SYSTEM WITH – AUTOMATED ATTENDANT SERVICE DIGITAL TAPE UNIT OR MS-DOS PC WITH ADVANCED ADMINISTRATION – VOICE MAIL SERVICE – ANNOUNCEMENT SERVICE SWITCHING NETWORK TRUNK FACILITIES ● DID FX ● TIE ● WATS ● – CALL COVERA
OVERVIEW be used to set up connections between data terminals, word processors, personal computers, and host computers. System 25 uses intelligent port circuits equipped with distributed network processor elements to provide (essentially) nonblocking voice and data switching.
OVERVIEW — STARLAN NETWORK Access (Release 2 of STARLAN only) — DS1 Facility interface. ● Networking Capability — Remote Access — Tie Trunks — Tandem Trunking — Endpoint in Electronic Tandem Network (Tributary only, not Satellite) — Endpoint of Enhanced Private Switched Communications Services (EPSCS) — Endpoint of Tandem Tie Trunk Network (TTTN) — Endpoint of Common Control Switching Arrangement (CCSA) — DS1 Facility Interface.
OVERVIEW Business Communications Needs The remainder of this section describes how System 25’s features may be used to satisfy a customer’s communications needs. This material may be thought of as the reverse of the “Features and Services” in Section 2. The business communications capabilities of the majority of small businesses with more than 30 phones are provided by a PBX. System 25 is a PBX designed to meet the business communications needs of customers in the 30 to 150 station range.
`OVERVIEW ● The Call Management System provides Automatic Call Distribution (ACD) service and associated call traffic and agent performance reports. ● Direct Group Calling (DGC) allows incoming calls to be directed to a specific group of stations. Calls to a DGC group hunt for an idle station in a circular manner, starting at the station following the last one called. If all group members are busy, calls are queued and can be sent to a delay announcement.
OVERVIEW ● Station Hunting provides automatic redirection of incoming calls to an idle member of a hunt group when the called party is busy. ● Pickup allows a user to answer a call ringing at another terminal. Directed Pickup allows a user to answer a call ringing at any terminal by dialing the pickup code and the Personal Dial Code (PDC) of the ringing station. Group Pickup permits calls to any other terminal in the pickup group to be answered by dialing the group call pickup code.
OVERVIEW ● Automatic Route Selection provides manager defined routing of calls over the telecommunications network based on preferred routes (normally the least expensive route available at the time the call is placed) with capacity for multiple common carriers and routing through tandem switch points. The user dials a standard Direct Distance Dialing (DDD) number and the system selects the call route.
OVERVIEW ● Pooled Facility-Dial/Direct Access allows both multiline and single-line voice terminal users to access a common pool of trunks for outgoing calls by dialing a facility access code, or, on multiline voice terminals, by pressing a button. This grouping provides resource pooling, which results in better service with a given number of trunks. ● Personal Lines provide dedicated outside lines for multiline voice terminal users. Personal lines are accessed via a dedicated feature button.
OVERVIEW Efficient internal call termination is supported with the following features. ● Distinctive Ringing provides various patterns of ringing to allow users to distinguish outside calls, inside calls, callbacks on queued calls, and calls set up at an associated data terminal. ● Hands-Free Answer on Intercom (HFAI) allows Speakerphone and HFAI terminals to auto-answer inside or attendant extended calls.
OVERVIEW ● Circuit switched data communications up to 19,200 bps (RS-232 interface) provide circuit switched connections from asynchronous data terminals, PCs, or host computers to host computers or network facilities. Users can be located and/or moved to any on-premises office equipped with the standard AT&T 4-pair wiring plan.
OVERVIEW ● The integrated voice-data dialing plan recognizes the different types of data endpoints (digital/analog and remote/local) in a connection and automatically inserts the required data communication equipment. In addition, autobauding supports the alignment of equipment with the capacity to transmit at different data rates. ● Station Hunting supports the use of a single dial code to access a group of host computer ports.
OVERVIEW Growth & Rearrangement Historical data indicates that clients in the System 25 station range have a need for communications systems capable of significant growth and rearrangement. Clients need flexibility over the life of the system to easily add capacity, move stations, modify cost control options, etc. The architecture of System 25 was implemented with the objective to meet this need.
OVERVIEW ● Tie Trunks for linking PBXs with dedicated private circuits for high volume calling. Dial access to stations, other trunks, answering groups (Direct Group Calling), and an Electronic Tandem Network endpoint capability are provided. ● Off-Premises Stations (OPS) allow single-line voice terminals and key systems to be located remotely and connected to System 25 via arrangements with the local telephone company.
FEATURES AND SERVICES Introduction 2-1 Account Code Entry, Forced 2-8 Account Code Entry, Optional 2-11 Attendant Call Extending 2-14 Attendant Camp-On 2-16 Attendant Cancel 2-18 Attendant Console, Direct Trunk 2-19 Attendant Console, Switched Loop 2-24 Attendant Direct Extension Selection 2-34 Attendant Forced Release (SLAC Only) 2-39 Attendant Join (SLAC Only) 2-40 Attendant Message Waiting 2-41 Attendant Position Busy 2-43 Attendant Release 2-46 Attendant Return Coverage On Bu
Call Accountability 2-75 Call Accounting System (CAS) 2-76 Callback Queuing 2-81 Calling Restrictions 2-88 Call Management System (CMS) 2-91 Call Progress Tones 2-94 Call Waiting 2-95 Command Mode 2-97 Communications Access Manager (CAM) 2-101 Conference 2-103 Conference Drop 2-106 Coverage, Group 2-108 Coverage, Individual 2-114 DS1 Facility Interface 2-117 Data Call Setup 2-128 Data Services Overview 2-129 Data Terminal Dialing 2-135 Dial Access to Message Waiting Indicat
Directory 2-155 Direct Station Selection (DSS) 2-158 Display 2-160 Distinctive Ringing 2-171 End-To-End Signaling 2-172 Exclusion 2-173 Expert Mode 2-175 Extended Stations 2-178 External Alerts 2-179 Following 2-182 Forwarding 2-185 Hands-Free Answer on Intercom (HFAI) 2-191 Headset Adapter Adjunct 2-194 Hold 2-199 Inspection 2-201 Integrated Solution (IS) 2-204 Intercept Treatment With Reorder Tone 2-207 Interdigit Timeouts 2-208 Last Number Dialed 2-209 Leave Word Cal
Message Center-Like Operation (SLAC Only) 2-225 Messaging Services 2-227 Modem Pooling 2-230 Music-On-Hold 2-233 Night Service 2-237 Night Service Delay Announcements 2-240 Off-Premises Stations (OPS) 2-242 Out-of-Building Stations 2-243 Paging System Access 2-244 Park 2-244 Personal Dial Code (PDC) 2-252 Personal Lines 2-254 Pickup 2-256 Pooled Facility - Dial Access 2-258 Pooled Facility - Direct Access 2-260 Power Failure Transfer (PFT) 2-262 Program 2-267 Recall 2-272
Speakerphone Adjunct 2-285 Speed Dialing 2-291 STARLAN NETWORK Access 2-294 Station Hunting 2-302 Station Message Detail Recording (SMDR) 2-304 Station-To-Station Message Waiting 2-317 System Administration 2-318 System Maintenance 2-328 Tandem Trunking 2-330 Test 2-332 Third-Party Call Setup 2-333 Tie Trunks 2-337 Touch-Tone and Dial Pulse Services 2-340 Transfer 2-341 Transfer To Data 2-344 Trunk Groups 2-346 Trunk-To-Trunk Transfer 2-349 User Changeable Options 2-350 V
Figures Figure 2-1. Typical Direct Trunk Attendant Console Position 2-19 Figure 2-2. Direct Trunk Attendant Console Connections 2-23 Figure 2-3. Typical Switched Loop Attendant Console Position 2-24 Figure 2-4. Buttons and Display of BIS-34D Figure 2-5. Switched Loop Attendant Console Connections 2-33 Figure 2-6. Model 23A1 Attendant Direct Extension Selector Console 2-35 Figure 2-7. Attendant Direct Extension Selector Console Connections 2-38 Figure 2-8.
Figure 2-26. External Alert Connections 2-180 Figure 2-27. Supplemental Alert Adapter Connections 2-181 Figure 2-28. Stages of Call Forwarding 2-185 Figure 2-29. 500A/502B Headset Adapter 2-195 Figure 2-30. Typical Headset Adapter to 7300H Series Voice Terminal Connections Not Requiring Auxiliary Power 2-196 Typical Headset Adapter to 7300H Series Voice Terminal Connections Requiring Auxiliary Power 2-197 Figure 2-32.
SMDR Output Equipment— On-Premises Direct Connections (Greater Than 50 Feet From System Cabinet or Not Sharing Same AC Outlet) 2-313 Figure 2-53. SMDR Output Equipment— On-Premises Switched Connections 2-314 Figure 2-54. SMDR Output Equipment— Off-Premises Direct Connections 2-315 Figure 2-55. SMDR Output Equipment— Off-Premises Switched Connections 2-316 Figure 2-56. Model 703 System Administration Terminal 2-322 Figure 2-57.
FEATURES AND SERVICES FEATURES AND SERVICES Introduction This section describes the System Features, Station Features, Network Features, Data Features, and Attendant Features of AT&T System 25. It also covers certain services that support and implement the features; included in this category are the digital tape unit, the dial plan, system administration, and system maintenance. A general discussion of data topics is also provided.
FEATURES AND SERVICES Symbols Used in Illustrations Many feature descriptions in this section contain illustrations of equipment and connections. In the connection figures, modular jacks are shown as triangles; 25-pair cable connectors are indicated by shaded blocks. Unterminated wiring that requires cutdown or other termination does not have symbol designations. The 103A Connecting Block is a typical modular wall jack that provides cutdown connections for building (station) wiring.
FEATURES AND SERVICES System Features System features (Table 2-A) are those that affect the entire operation of the system. Table 2-A.
FEATURES AND SERVICES Station Features The many Station Features (Table 2-B) available allow individual user needs to be met. As these needs change, assigned features can also be changed. Station Features provide many important services that help save time and make calling more convenient. Table 2-B.
FEATURES AND SERVICES Table 2-B.
FEATURES AND SERVICES Data Features Data Features (Table 2-D) support the switched data services of the system. Data services provide switched connections between analog and digital data endpoints. Table 2-D.
FEATURES AND SERVICES Attendant Features Attendant Features (Table 2-E) are available to the attendant using the Direct Trunk Attendant Console (DTAC) or the Switched Loop Attendant Console (SLAC) and the optional Direct Extension Selector Console. In addition, most multiline voice terminal station features are available to the attendant. Table 2-E.
FEATURES AND SERVICES Account Code Entry, Forced Description This feature forces selected station users to enter account codes before dialing certain calls out of System 25. Users at stations that have Forced Account Code Entry (FACE) are required to enter account codes either for all outgoing calls or for just “dial 0 or 1” toll calls. The code entries appear in the ACCOUNT field of the SMDR records.
Account Code Entry, Forced The system does not check the validity of account codes. It checks only for the proper number of digits or the code terminator #. Calls that do not require FACE can still be assigned an account code, as in previous releases of System 25. Refer to the “Account Code Entry, Optional” feature description in this manual for the procedures. Interactions The following features interact with Forced Account Code Entry.
FEATURES AND SERVICES Remote Access: Remote access callers cannot enter account codes. Third-Party Call Setup: If the source station is FACE-restricted, the third-party data terminal must prefix the outside destination number with ✶ 0 and an account code. Transfer: Calls can be transferred in both directions between a FACE-restricted station and a non-FACE station.
Account Code Entry, Optional Account Code Entry, Optional Description Optional Account Code Entry allows voice terminal users to associate an account code with incoming and outgoing calls. The account code is appended to the SMDR call record and can be used later for accounting or billing purposes. For an incoming call, the user must enter the account code at the end of the call.
FEATURES AND SERVICES Erroneous account codes that are not corrected before the last digit is entered are recorded and cannot be changed. Partial account codes entered by going on-hook before completing the entry are recorded and cannot be changed. If, before all digits have been entered, (1) the user goes on-hook, (2) a button other than ACCT ENTRY is pressed, or (3) 30 seconds have elapsed since the feature was invoked, the SMDR call record will show the digits dialed up to that point.
Account Code Entry, Optional Administration Requirements System: ● Assign number of Account Code digits (0-15; default = 15). Voice Terminal Port: ● Multiline terminals—Assign Account Code Entry button. ● Single-line terminals— no administration required. Hardware Requirements Requires a RS-232 compatible 80-column ASCII (serial) printer or other device to output Station Message Detail Recording (SMDR)/Account Code entries.
FEATURES AND SERVICES Attendant Call Extending Description This feature allows the attendant to put a call in a special hold condition, call another station, then connect the two calls together. The attendant can withdraw from the connection and separate the call from the console or remain connected to the other parties. Attendant Call Extending is a feature used at either a Direct Trunk Attendant Console (DTAC) or a Switched Loop Attendant Console (SLAC).
Attendant Call Extending Calls extended to an idle voice terminal that are not answered within a specified time return to the Attendant Console on an idle LOOP button (SLAC only) or on the Return-On-Don’tAnswer (RTN-DA) button (DTAC only). Calls camped-on at a busy voice terminal that are not answered within a specified time return to the Attendant Console on an idle LOOP button (SLAC only) or on the Return-On-Busy (RTN-BUSY) button (DTAC only).
FEATURES AND SERVICES Attendant Camp-On Description This feature allows the attendant to extend a trunk call to a busy voice terminal and leave it waiting or “camped on” there. After hearing busy tone, the attendant presses RELEASE to camp-on this call at the busy terminal. When this is done, a burst of tone is heard in the handset of the called terminal and the caller is placed on hold (hearing music-on-hold if available).
Attendant Camp-On Direct Group Calling: The attendant can camp-on more than one call per DGC group. Voice terminals in the group do not receive a burst of tone when a call is camped on. Trunk calls camped onto a busy DGC group go into the DGC queue and are eligible for delay announcement and music-on-hold. Direct Inward Dialing (DID): DID calls can be covered by the attendant and then given Camp-On treatment. They do not automatically receive Call Waiting.
FEATURES AND SERVICES Attendant Cancel Description This feature allows the attendant to terminate an attempt to extend any incoming call if the called station does not answer, or if the station answers but declines to accept the call. The attendant presses CANCEL and is automatically reconnected to the calling party. The call can then be ended by hanging up or by pressing RELEASE. Pressing CANCEL when the Start facility is not active will be ignored.
Attendant Console, Direct Trunk Attendant Console, Direct Trunk Description In System 25, the Attendant Console is used to answer incoming trunk calls that are not directed to specific user stations, to answer calls from inside users, to extend calls to inside stations and outside numbers, and to assist system users in placing outgoing calls and setting up conferences. The attendant can also manage and monitor some areas of system operation.
Attendant Console, Direct Trunk ● Start [START]: Initiates the call-extending process by placing a caller on hold and providing internal dial tone to the attendant. ● Cancel [CANCEL]: Terminates the “START” operation and reconnects the attendant to the calling party. ● Release [RELEASE]: Releases the attendant from an active call and completes the callextending process.
Attendant Console, Direct Trunk Position Busy A POS BUSY button can be assigned to each console; this permits selection of one of two modes of operation: (1) simultaneous operation or (2) only one Attendant Console active. (Note that only one console is allowed to be inactive at any given time.) An associated POS BUSY status LED is lighted when the console is inactive. Ringing is disabled on all trunk terminations on the rightmost two columns of buttons of the inactive console.
FEATURES AND SERVICES Administration Requirements System: ● Display attendant position number (first or second). ● Assign number of rings before unanswered calls return to the Attendant Position (131; default = 5). ● Force DID calls to unassigned numbers to ring at the Attendant Position (yes or no; default = yes). ● Force calls to FPDCs that are not signed in anywhere to ring at the Attendant Position (yes or no; default = yes).
Attendant Console, Direct Trunk SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP PART OF SIP C2 SIP ADAPT.
FEATURES AND SERVICES Attendant Console, Switched Loop Description In System 25, the Attendant Console is used to answer incoming trunk calls that are specified to ring at an attendant position, to answer calls from inside users, to extend calls to inside stations and outside numbers, to assist system users in placing outgoing calls, and to set up conferences. The attendant can also manage and monitor some areas of system operation.
Attendant Console, Switched Loop The Switched Loop Console derives its name from the ability of the system to hold incoming attendant-bound calls in a queue and switch them on voice loops to an available console. Calls are directed to a console in a pre-administered, prioritized sequence.
Features and Services ● Position Busy [POS BUSY]: Temporarily removes the attendant position from service. (Iuse and status LEDs on basic SLAC.) ● Attendant Message Waiting [ATTENDANT MESSAGE WAITING]: Used by the attendant to remotely control; Message LEDs on voice terminals. (Status LED only on basic SLAC.) ● Alarm [ALARM]: The associated green status LED flashes when a system trouble has been detected; the LED can be changed from flashing to steadily lit by pressing the button.
Attendant Console, Switched Loop Display (Figure 2-4) The SLAC contains an alphanumeric call information display. This module is built into the top of the console. It contains a 16-character 5x7 dot matrix liquid crystal display, timer controls, and a thumbwheel Contrast adjustment. Timer functions are available only when the attendant presses the Local button. The Time/Timer Exit button allows the user to select ordinary clock/calendar display or a timer.
FEATURES AND SERVICES Placing a Call on a LOOP Button In general, originating a call at an idle SLAC involves going off-hook and then dialing the desired number. If the console is not idle, the attendant can generally use one of these procedures: ● Split the active call (that is, put it on temporary hold by pressing the Start button) and place another call on the same button; this is the normal call-extending procedure.
Attendant Console, Switched Loop Call Types The following types of attendant-seeking calls are sent to the common queue and then directed to an idle LOOP button at a console: ● Incoming trunk calls that are administered to ring in the queue.
FEATURES AND SERVICES Figure 2-4. Buttons and Display of BIS-34D Ringing The SLAC receives normal ringing on incoming calls. Abbreviated alerting (one short burst of ringing), accompanied by a change in the LOOP button wink rate, indicates to the attendant that a held call has exceeded the preset hold time interval. Calls on hold can be administered to continue on hold after the second timeout or to return to console queue.
Attendant Console, Switched Loop Considerations One System 25 configuration can support either one or two SLACs or one or two DTACs, but not a combination of a SLAC and a DTAC. The optional Direct Extension Selector Console can be connected to a SLAC to provide busy/idle status of inside stations and quick calling of their extension numbers. In a system with two consoles, either or both can have a Selector Console as an adjunct.
FEATURES AND SERVICES Call Waiting: Calls cannot wait at the SLAC Callback Queuing: Calls that are originated without use of the START button can be queued for busy facilities. They are treated like calls from standard multiline stations. A queued call remains on the LOOP button where it was originated and does not return via the common queue. Headset Adapter: Connection of a headset adapter to the SLAC allows the optional use of a headset instead of the handset in handling calls.
Attendant Console, Switched Loop Hardware Requirements Each console requires a port on a ZTN79 ATL Station circuit pack. Figure 2-5 provides a connection diagram for the SLAC. SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP PART OF SIP C2 SIP ADAPT .
FEATURES AND SERVICES Attendant Direct Extension Selection Description This feature permits the attendant to extend calls to stations by pressing one or two buttons instead of pressing START and dialing the extension number. Each attendant console in a system can have an associated Direct Extension Selector Console. A Selector Console can be used with either a Direct Trunk Attendant Console (DTAC) or with a Switched Loop Attendant Console (SLAC).
Attendant Direct Extension Selection 100 DXS BUTTONS WITH LEDS GROUP SELECT BUTTONS AND ASSOCIATED LEDS TEST BUTTON NOTE : STATUS LEDs are located to the left of each DXS button (00-99) under transparent front cover. Figure 2-6.
FEATURES AND SERVICES A call parked via the Selector Console can be picked up at any voice terminal by dialing the Park retrieval code ( ✶ 8 ) and the number on which the call is parked. The rightmost button on the bottom row is a Test button. When it is pressed, all DXS LEDs will light sequentially; a second press allows individual LEDs to be tested and a third press ends the test.
Attendant Direct Extension Selection Callback Queuing: Callbacks to the attendant do not flash at the associated Selector Console. Coverage: If the attendant receives a coverage call for a FPDC, the associated status LED on the Selector Console will flash and then go dark when the call is answered by the attendant. Direct Group Calling: When all stations in a DGC group are busy, the DXS status LED on the Selector Console lights.
FEATURES AND SERVICES SYSTEM 25 CABINET ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE PART OF SIP C2 SIP ADAPT. W1 B1 400B2 ADAPT.
Attendant Forced Release (SLAC Only) Attendant Forced Release (SLAC Only) Description This feature drops all active parties from a call in which the attendant and one or more other parties are connected together. The attendant uses the feature by pressing the FORCED RELEASE button while connected to other callers in a conference-type call. The other parties will be disconnected from the console and from each other.
FEATURES AND SERVICES Attendant Join (SLAC Only) Description This feature allows the attendant, while extending an incoming call, to connect together the calling party, the called party, and the console in a 3-way call. All parties can talk to each other. The attendant activates the feature by pressing the JOIN button while still connected to one of the other parties. Considerations The Join feature cancels a split condition.
Attendant Message Waiting Attendant Message Waiting Description This feature allows the attendant to remotely control the status of Message LEDs on user stations. The attendant can activate the Message LED of the station while either (1) ringing, (2) receiving Busy Tone, or (3) talking to a station. The status of the Message LED of the called party is reflected by the green status LED of the Attendant Message Waiting button in any of these cases.
FEATURES AND SERVICES Coverage Calls: The attendant can light the Message LED of the covered station when receiving a coverage call for the station. Hands-Free Answer On Intercom: If the attendant lights the Message LED on a voice terminal with AUTO ANS button active, the auto-answer function will turn off, allowing subsequent calls to receive coverage as assigned.
Attendant Position Busy Attendant Position Busy Description This feature allows an Attendant Console to be placed in an inactive mode. Systems with Direct Trunk Attendant Console(s) (DTAC) There must be two Attendant Consoles in the system before this feature can be activated. A Position Busy (POS BUSY) button can be assigned on each of the consoles. Pressing POS BUSY at one of two active consoles causes the POS BUSY status LED to light and the console to be placed in the inactive mode.
Features and Services A console in Position Busy mode can receive attendant PDC, DID, and DGC calls, and outgoing calls can still be placed. Local functions can be activated. Considerations Position Busy allows one of two attendant positions to be made inactive when not required. This is useful in situations where calling traffic requires only one console operator. Interactions The following features interact with Attendant Position Busy.
Attendant Position Busy Forwarding: If a PDC/FPDC is signed in at an inactive attendant console, then calls to this PDC/FPDC will go to the active attendant (SLAC) or to the inactive attendant (DTAC only). All calls to FPDCs not signed in will be transferred to the active attendant. Night Service: An inactive attendant that is a Directed Night Service receiver will receive Night Service calls.
FEATURES AND SERVICES Attendant Release Description This feature releases the attendant from unextended call. There are two forms of Attendant Release: Manual and Automatic. This feature applies to the Direct Trunk Attendant Console (DTAC) and the Switched Loop Attendant Console (SLAC). Manual Release: Pressing RELEASE releases the attendant from an extended call and completes the associated call transfer.
Attendant Release Interactions The following feature interacts with Attendant Release. Attendant Camp-On: camped on. External calls that are released when Busy Tone is heard will be Administration Requirements System with SLAC: Enable Automatic Hold feature? (yes for Automatic Hold or no for Automatic Release; default = no).
FEATURES AND SERVICES Attendant Return Coverage On Busy Description This feature allows a camped-on call at a busy station or DGC Group to be returned to the attendant for service after a specified time period. A camped-on call not answered within 1 to 120 seconds (administrable) after the attendant releases the call will return to the console in one of the following ways: ● On the Return-On-Busy (RTN-BUSY) button at a Direct Trunk Attendant Console (DTAC).
Attendant Return Coverage On Busy Attendant Direct Extension Selection: If a call to a Floating PDC (FPDC) is returned to the attendant, the FPDC’s status LED on the Selector Console will flash during ringing and go dark when the call is answered. Direct Group Calling: External calls that are camped onto a DGC group that does not have a delay announcement will return to the attendant console after the specified number of rings.
FEATURES AND SERVICES Attendant Return Coverage On Don’t Answer Description This feature allows unanswered calls extended by the attendant to be returned to the attendant for additional service. Calls that are not answered after a administered number of rings will transfer ringing to the Return-On-Don’t-Answer (RTN-DA) button on a Direct Trunk Attendant Console (DTAC) or to a LOOP button on a Switched Loop Attendant Console (SLAC).
Attendant Return Coverage On Don’t Answer Coverage: ● DTAC only—Whenever a DTAC attendant is a coverage receiver for a particular coverage group and a call is placed from the attendant position via the Start button or the Selector Console to a voice terminal in that group, the Coverage-Group (COVER-GRP) button on the Attendant Console will not track the call (COVER-GRP button status LED will not flash).
FEATURES AND SERVICES Attendant Source and Destination (SLAC Only) Description This feature allows the attendant, while extending a call, to switch back and forth between the calling party (the source) and the called party (the destination) before connecting them together. Pressing the SOURCE button on the SLAC after the called party has been reached has these results: ● The called party (the destination) is put on hold.
Attendant Splitting One-Way Automatic Attendant Splitting One-Way Automatic Description This feature allows the attendant to converse privately with a called party while the calling party is split away on hold. When the attendant presses START (or a DXS button) to extend an incoming call to a called party, the calling party is automatically split away from the connection and placed on hold. This allows the attendant to talk privately with the called party before extending the call.
FEATURES AND SERVICES Attendant System Alarm Indication Description This feature provides a visible alarm on the Attendant Console to alert the attendant to problems detected by the system software. The ALARM LED on the Attendant Console will flash whenever a detected fault persists longer than four minutes, or if more than five transient faults per hour are detected. The alarm indication should be reported immediately to your AT&T Systems Technician.
Automatic Intercom Automatic Intercom Description This feature allows a multiline voice terminal user including ATL cordless telephone (or attendant) to place and answer calls to and from another station by use of a dedicated button appearance. Automatic Intercom provides a private path between two designated multiline voice terminals. To place an Automatic Intercom call, the calling party presses the Automatic Intercom (AUTO ICOM) button and goes off-hook.
FEATURES AND SERVICES Interactions The following features interact with Automatic Intercom. Attendant Position Busy: The inactive attendant is permitted to place Automatic Intercom calls. Automatic Intercom calls to an inactive DTAC where the AUTO ICOM button is located in one of the two rightmost button columns will not ring at the console, nor can they be covered by the active attendant. However, Automatic Intercom calls to an inactive SLAC will ring there.
Automatic Route Selection (ARS) Automatic Route Selection (ARS) Description This feature provides for the routing of calls over the telecommunications network based on preferred routes (normally the least expensive route available at the time the call is placed.) An ARS pattern can be composed of two subpatterns (time of day determines which subpattern is selected), each consisting of up to three routes, associated Facility Restriction Level (FRL) codes (described below), and CO overflow flags.
Features and Services ● Calls made to specified COs or seven-digit telephone numbers within the Home Number Plan Area (Home Area Code). These calls are routed as specified in the Home Area Code Exception Lists, or else via the Area Code Routing Table, or (by default if not otherwise specified) the local CO facility. ● Calls made to Area Codes outside the Home Area Code, sometimes referred to as Foreign Area Codes (FNPAs).
Automatic Route Selection (ARS) Calls are checked to determine if they are international calls or operator calls. Dialed numbers “01” or 011 signify international calls, “0” plus a number other than “1” signify operator calls (00 calls signify Intra-Lata operator calls). If the call is an international call and the terminal is not restricted, the international routing pattern is selected and the call routed accordingly. Operator calls are routed via the local CO facility.
Features and Services An FRL is typically lower for the first route in a subpattern and increases with each additional route in the pattern. A terminal’s FRL must be equal to or greater than the route FRL for the route to be selected. The system first checks the Route #1 for an available trunk on which to route the call. If the route is busy, Route #2 is checked, then Route #3, if required.
Automatic Route Selection (ARS) ● Area Code (NAA) Routing Table: Entries may include every North American NAA and Special Number NAA, each with an associated ARS Routing Pattern. All NAAs existing before 1995 are assigned Routing Pattern #1 by default. As new NAAs are created, they have to be assigned routing patterns. ● Other Area Code Exception List: One List with up to 512 eight-digit numbers. Each entry has an associated ARS Routing Pattern. ● Digit Translations Tables: One per trunk group.
Features and Services ● Specify whether “Dial 1” is needed for toll calls within your area code. (This requirement is ignored for the 10-digit dial plan.) ● Specify current dial plan, i.e., pre-interexchangeable area codes, interexchangeable area codes, or 10-digit number plans.
Automatic Route Selection (ARS) — Subpattern A Start and End Time (Hour:Minute). — Subpattern A and B—Route 1, 2, and 3 Facility Access Codes (1-9999) or Virtual Facility Codes (#190-#199). — Subpattern A and B— Route 1, 2, and 3 FRLs (0-3). — Subpattern A and B Overflows to CO facility (yes or no). — Subpattern A and B Overflow FRL (0-3). Terminal Port: ● ARS FRL Level (0-3).
FEATURES AND SERVICES STATION USER DIALS ARS ACCESS COOE [401] NUMBER DIALED ON EMERGENCY NUMBERS LIST (911, AND THREE CUSTOMER DEFINED 7-DIGIT NUMBERS VOICE TERMINALS “RESTRICT OUTWARD CALLS” = YES NO YES CALL ROUTED VIA LOCAL CO FACILITY NO NO NUMBER DIALED INTERNATIONAL, OPERATOR, OR OTHER YES YES CALLING USER RECEIVES SYSTEM REORDER TONE NUMBER DIALED ON TOLL CALL ALLOWED LIST? 64 CODES MAY BE DIVIDED INTO 4 LISTS OF ANY LENGTH OPERATOR YES TOLL ALLOWED [1-3] INTERNATIONAL NO STATION U
Automatic Route Selection (ARS) FROM SHEET 1 NUMBER DIALED WITHIN HOME NPA? OUTSIDE HOME NPA (FNPA) NO NO NUMBER DIALED ON FNPA EXCEPTION LIST YES CALL ROUTED VIA ASSOCIATED ROUTING PATTERN [800] YES SYSTEM [30] NO YES CALL ROUTED VIA LOCAL CO FACILITY SPECIAL N11 SERVICE CODE DIALED YES [900] CODE HAS AN ASSIGNED ROUTING PATTERN NO YES [901] NO NUMBER DIALED ON HOME NPA EXCEPTION LISTS [500] AREA CODE ON NPA ROUTING TABLE [300] YES CALL ROUTED VIA ASSOCIATED ROUTING PATTERN CALL ROUTE
FEATURES AND SERVICES ROUTING SUBPATTERNS (RSP) A AND B RSP A ROUTING PATTERNS (1-8) START/ STOP TIME [101], [l02] [100] RSP B [200] ROUTE 1 ROUTE 2 ROUTE 3 POOLED FACILITY ACCESS CODE POOLED FACILITY ACCESS CODE POOLED FACILITY ACCESS CODE CO OVERFLOW FLAG [110] [120] [130] [140] FRL (0-3) [111] FRL (0-3) [121] FRL (0-3) [131] FRL (0-3) [141] ROUTE 1 ROUTE 2 ROUTE 3 POOLED FACILITY ACCESS CODE POOLED FACILITY ACCESS CODE POOLED FACILITY ACCESS CODE CO OVERFLOW FLAG [210] [220]
Bridging of System Access Buttons Bridging of System Access Buttons Description This feature allows a multiline station user to handle calls on Bridged Access (BA) buttons associated with System Access (SA) buttons of another multiline station (Figure 2-10). The following terms are used throughout this feature description: ● Principal station— a multiline voice terminal that has SA buttons bridged by one or more other multiline stations. ● Principal—the user of a principal station.
FEATURES AND SERVICES The user active on a BA button can use many features with the bridged call; operation is no different from calls on other buttons. For example, Hold, Conference, and Transfer can be used from a BA button just as they would be used from a SA button. Calling restrictions applied to calls made on bridged appearances are those of the bridging station, not those of the principal station.
Bridging of System Access Buttons status LEDs of the SA button and the bridged appearances light steadily. If neither principal nor bridging user answers, the call goes to the principal’s coverage—if provided—in the usual way. When the covering station answers, the status LEDs at the principal and bridging stations light.
FEATURES AND SERVICES Automatic Intercom: Calls on Automatic Intercom buttons on the principal station are not accessible from bridged call appearances. Automatic Route Selection (ARS): When a station user originates a call on a BA button and dials the ARS access code. the call is completed according to the restrictions assigned to that station. The restrictions of the principal and the other bridging stations have no effect. Callback Queuing: Calls originated on Bridged Access (BA) buttons can be queued.
Bridging of System Access Buttons Direct Group Calling (OGC): DGC calls arriving on SA buttons at a principal station can receive bridging treatment at a bridging station. Direct Station Selection (DSS): Calls from DSS or Flex DSS buttons on the principal station are not accessible from bridged appearances. Exclusion: If a principal or bridging station presses the EXCLUSION button during a call, all other internal stations on the call will be dropped.
FEATURES AND SERVICES Park: If a station is active on a bridged call appearance and activates Park, the call is parked on the Personal Dial Code (PDC) number of the principal station, not of the bridging station. If the parked call is not answered, it will return on the principal’s SA button. Personal Speed Dialing: Personal Speed Dialing is a station-oriented feature.
Bridging of System Access Buttons If two bridged stations attempt to originate a call at the same time, and if the call is completed, the PDC number of the station that dialed the first digit is placed in the SMDR records under the STN column. Transfer: A call can be transferred from a bridged call appearance using the usual transfer operations.
FEATURES AND SERVICES Busy-To-Idle Reminder Description Busy-to-Idle Reminder alerts a multiline voice terminal user by a single ring as soon as a busy internal station, DGC group, or facility (trunk group) becomes available. The feature can be activated only for stations, DGC groups, and trunk groups represented on the terminal by DSS, FLEX DSS, AUTO ICOM, and FACILITY buttons. Before making a call to a station, the multiline voice terminal user can check the green status LED of the station button.
Call Accountability Call Accountability Description This feature allows calls made by system users from other users’ stations to be charged to the callers’ own “home” Personal Dial Code (PDC). To charge a call to the home PDC, the user dials ## followed by the PDC immediately upon receiving first dial tone to place a call. When second dial tone is returned, the user dials the desired number in the normal way.
FEATURES AND SERVICES Call Accounting System (CAS) Description Call Accounting is the collecting, processing, and use of information about all trunk calls placed from and received by System 25. It is intended to help customers control telephone use and manage associated costs. Detailed call data is available at Interface Port 2 of the Digital Switch’s CPU/MEM Circuit Pack.
Call Accounting System (CAS) ● Multi-Function Mode: Allows the user to print reports, edit files, and run other PC-based programs while the CAS continues to collect and buffer call records in the background. The user must enter the Dedicated Mode to process calls and generate reports. The CAS performs three main functions; (1) call record processing, (2) report generation, and (3) CAS system management. In addition, a limited directory lookup and message center is provided.
Features and Services The following table summarizes CAS station and account capacities. AT&T CALL ACCOUNTING SYSTEMS CAS Model Stations Account Codes 200 100 5000 300 150 5000 500 500 5000 2000 2000 15000 Refer to the CAS documentation supplied with the software package for additional information. Considerations The CAS provides customers with an efficient tool to control and manage their telephone usage and costs.
Call Accounting System (CAS) ● DTR (data terminal ready) required from printer. ● RTS (ready to send) and CTS (clear to send) not required. ● No flow control. Refer to Figures 2-11 and 2-12 for typical CAS connection information. SYSTEM 25 CABINET PART OF OCTOPUS CABLE C2 ZTN130 CPU/MEM PART OF SIP > Z210A ADAPT. C1 355A/AF ADAPT. CALL ACCOUNTING SYSTEM LEGEND: C1 C2 355A ADAPTER 355AF ADAPTER Figure 2-11.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE C2 ZTN130 CPU/MEM PART OF SIP Z210A ADAPT. C1 355AF ADAPT. C3 C1 Z3A4 ADU PART OF SIP Z3A1 OR Z3A4 ADU (NOTE) CALL ACCOUNTING SYSTEM C1 B1 W1 858A <> C4 400B2 ADAPT. C7 2012D TRANS. LEGEND: B1 C1 C2 W1 Z3A1 ADU - Z3A4 ADU C3 C4 355AF ADAPTER Z3A4 ADU C1 C7 248B ADAPTER 400B2 ADAPTER 2012D TRANSFORMER - 248B ADAPT.
Callback Queuing Callback Queuing Description This feature provides System 25 users with a simple way to complete calls to busy facilities (stations or trunk groups), without having to manually repeat the calling procedures. Callback Queuing puts inside calls to busy stations and trunk pools into a queue. The maximum number of queue slots is 64, administrable in any combination of inside and outside calls. After a call is queued for the busy facility, the caller can stay off-hook or go on-hook.
FEATURES AND SERVICES While off-hook on a queued call, a single-line user can transfer or conference the call. ● On-Hook Queuing The caller can hang up after a call to a busy station goes into queue. The call retains an association with the on-hook calling terminal, and a callback will alert the on-hook user when the queued-for station is available. After a single-line terminal user goes on-hook, the queued call cannot be accessed until a callback attempt occurs.
Callback Queuing ● Callback Cancellation The user can cancel a call that was queued manually or automatically. At a multiline set, if the call is queued off-hook, the user presses the DROP button, then the queued call button. If the call is queued on-hook, the user must go off-hook, press the queued call button to become active on the call, press DROP, and then press the queued call button again. At a single-line set, the user must get dial tone, then dial the callback cancel access code #61.
FEATURES AND SERVICES Considerations Callback Queuing saves time for users because they can avoid repeated redialing of busy numbers. It allows trunks to be used more efficiently and can reduce the number of trunks required for a system. The feature is similar to the Busy-to-Idle Reminder feature but applies to different types of calls. The two features can both be used to reduce redialing effort. A single-line voice terminal can queue only one call at a time.
Callback Queuing Bridging of System Access Buttons: Calls originated on Bridged Access (BA) buttons can be queued. On callback attempts, only the originator will be rung; all other appearances will only flash. Any appearance in the bridging arrangement can be used to drop a queued call, if no other station is off-hook. If both principal and bridging users are off-hook on a call to a busy facility, only the first one off-hook can queue the call.
FEATURES AND SERVICES Exclusion: pressing the EXCLUSlON button does not drop a queued call. The EXCLUSION button’s status LED tracks the status LED of the associated button. For example, on a callback attempt, the EXCLUSION LED will also change from winking to flashing. If the EXCLUSION button is tracking a conference on hold, it will stay winking with the rest of the conference. When the callback attempt is answered. the EXCLUSION LED lights steadily to track all the conference buttons.
Callbaok Queuing Note: It is highly recommended that queue size be set to either 0 or 64, not to some number in between. ● Assign the minimum time between callback attempts for inside calls (0 to 120 seconds; default = 30). ● Assign the minimum time between callback attempts for outside calls (0 to 120 seconds; default = 30). Voice Terminal Ports: (Every station has independent control of the number of callback retries and the number of rings per attempt.
Features and Services Calling Restrictions Description Designated voice and data terminals can be restricted from making certain types of calls. Available restrictions are: ● Outward Restriction ● Toll Restriction ● Facility Access Restriction ● ARS Restrictions ● Public Station Restrictions ● International Restrictions. ● Interexchange Carrier (IXC) Restrictions Note: Each of these restrictions is voice terminal oriented, not PDC oriented.
Calling Restrictions Equal Access: Allows equal access to all Interexchange Carriers (IXC) when a station is administered for IXC+1 and/or IXC+011 dialing. Toll restriction checking occurs when an IXC code+1 or IXC code+01 is dialed. IXC code+0, IXC code+011, and 0+ calls are allowed from toll restricted stations that have outward calling capability and select a type 701 and 801 trunk administered with “Originating Line Screening” either via pool access or personal line appearance.
Calling Restrictions Facility Access Restriction: Any station may be denied dial access to the local CO and/or to all other pooled facilities (as a group). A station so restricted may only dial access those facilities via the Automatic Route Selection (ARS) feature. In addition, each trunk and Virtual Facility can be administered to allow or restrict dial access. If dial access is restricted, the trunk or Virtual Facility may only be dial accessed via ARS.
Features and Services Pooled Facility—Direct Access: Toll restricted stations receive their class of service toll restrictions whet her a Direct Facility Access (FACILITY) button or a facility access code is used. Personal Lines: Personal Lines are subject to the toll restriction options of the stations on which they appear. Remote Access: A barrier code class of restriction (COR) has the same parameters as the class of service permissions associated with stations.
Call Management System (CMS) Call Management System (CMS) Description The Call Management System (CMS) is an automatic call distributor that directs specified incoming calls to assigned “agents” for handling. It also provides reports of CMS call traffic and agent performance. The CMS has options and parameters that allow the system to be tailored to the individual needs of specific businesses.
FEATURES AND SERVICES ● If no agent has become available by the end of the delay message, CMS puts the call into the main split’s queue of waiting calls. If available on the System 25, Music-onHold will be heard by these callers while they wait. ● As soon as an agent in the main split becomes available, CMS will transfer the call at the front of the queue to the agent.
Call Management System (CMS) Considerations CMS is useful for businesses where particular groups or departments receive special types of calls in high volumes. Members of such groups can be assigned to splits. Call completion time is minimized; with calls going directly to a split, attendant assistance is not required. CMS has the following maximum capacities: ● 28 lines ● 4 line groups ● 28 lines in one group ● 28 agent positions ● 28 agents in one split.
FEATURES AND SERVICES Call Progress Tones Call Progress tones provide audible feedback on the status of calls during call setup. These tones are heard through the handset or the headset or the speaker, if Speakerphone or HFAI is activated. ● Busy Tone: A slow pulsed tone indicating that all facilities for answering the call are in use. ● Call Waiting/Camp-On Tone: A single or double burst of tone sent to a busy terminal to notify the user that a call is waiting.
Call Waiting Call Waiting Description This feature allows a user at a busy voice terminal to be audibly alerted when another party is calling. A voice terminal is considered busy if all its System Access (SA) buttons are in use (multiline sets), if it is off-hook (single-line sets), and if all coverage points are busy. With Call Waiting, the user hears a distinctive call waiting tone from the handset one time; the caller hears special ringback tone, repeated.
FEATURES AND SERVICES Interactions The following features interact with Call Waiting. Attendant Camp-On: Trunk calls camped onto a station by an attendant are given priority over other waiting calls. Attendant Positions: Calls cannot wait at Direct Trunk Attendant Consoles and Switched Loop Attendant Consoles.
Command Mode Command Mode This feature allows data terminal users to originate data and voice calls and change (or view) their data port options. (Refer also to the general description of the system’s data features in “Data Services Overview”). Command Mode supports digital data endpoints connected via Asynchronous Data Units (ADUs) to ports on a Data Line CP (TN726). Command Mode also supports, with certain restrictions, users of the STARLAN Interface Circuit Pack, ZTN84.
FEATURES AND SERVICES : The data terminal user can originate a call for an on-premises source voice or data terminal to a remote terminal by selecting and dialing the required digits. Refer to the “Third-party Call Setup” feature description for a complete description of this feature. : If the Command Mode menu item is chosen, the terminal displays the data port’s administered options. System default values for each option are also shown.
Command Mode Table 2-G. Partial List of Permissible Data Port (TN726) Options OPTION DEFINITION Speed (61-68)† Autobaud, Low*, 300, 1200, 2400, 4800, 9600, 19200 Parity (69) Odd, Even, 0, 1. The 0 and 1 choices are not shown on the user’s display. Enable Command Mode (70) Yes or No. Must be On for Command Mode (i.e., Command Mode Menu display). Not shown on user’s options display. Allow user to change data port options? (71) Yes or No. Used to enable/disable User Changeable Options feature.
FEATURES AND SERVICES Table 2-H. Options Typical Option Profiles for Data Port Endpoints Host Data Term.
Communications Access Manager (CAM) Communications Access Manager (CAM) The Communications Access Manager (CAM) program facilitates communication between workstations on the AT&T STARLAN NETWORK (STARLAN NETWORK) and workstations on System 25. Since CAM has a built-in interface to System 25’s Command Mode, it is an ideal communications application for PCs connected to System 25. Detailed procedures for using CAM can be found in the CAM User Guide.
FEATURES AND SERVICES COMMUNICATIONS ACCESS MANAGER EX-RS232C DRIVER RS-232-C PORT NAUCOM DRIVER STARLAN NAU PORT PERSONAL Figure 2-13. COMPUTER Communications Access Manager Architecture ● Personal Directory area —holds a maximum of 200 entries, displayed 10 entries at a time. Each screen is arranged alphabetically. ● Message and Status area —contains prompts and messages for the user for the action being executed.
Conference Conference Description This feature allows up to five parties, including the conference originator, to participate in a conference call. Any voice terminal user (the ATL cordless telephone user cannot participate in a conference call), including operators at Direct Trunk Attendant Consoles and Switched Loop Attendant Consoles, can set up conferences. Refer to the description of “Conference Drop” for additional information on conferencing.
FEATURES AND SERVICES Interactions The following features interact with Conference. Account Code Entry, Forced (FACE): Calls can be conference in both directions between a FACE-restricted station and a non-FACE station. Account Code Entry, Optional: If more than one user attempts to associate an account code with a Conference Call, the first to activate the feature will prevail. Attendant Message Waiting: Pressing the Attendant Message Waiting (ATT MSG) button while on a conference call will be ignored.
Conference Exclusion: Exclusion may be invoked before establishing a conference. If it is invoked after the conference is established, all internal conferees will be dropped (except for the party that invoked Exclusion). Extended Stations: An Extended Station counts as one of the two allowable outside lines on a conference call. Forwarding: If one of the called parties for a conference is a forwarding station, its forwarded-to station will be the conference facility.
Features and Services Conference Drop Description This feature allows a voice terminal user, except for the attendant at a Switched Loop Attendant Console (SLAC), to selectively drop a previously added party from a conference call. At a SLAC, the attendant can drop conferees only before they have been added to conference.
Conference Drop Considerations Conference Drop allows users to conference lines appearing on their terminals and then remove them from the conference when appropriate. The only parties that a user should try to drop from a conference are those that the user actually added. If a user tries to drop a party who previously added the user to a conference, other parties may also be dropped. Interactions The following feature Interacts with Conference Drop.
FEATURES AND SERVICES Coverage, Group Description This feature allows calls to covered stations to be redirected to a group of covering stations. A total of 32 standard Coverage Groups may be assigned; an additional 32 “DGC” Coverage Groups may be assigned. Each standard group may be covered by up to eight coverage receivers (buttons). There is no limit on the number of covered users (senders) that each Coverage Group can include, but a covered user can be assigned to only one Coverage Group.
Coverage, Group terminal. If there is no idle Cover button on any covering terminal, either individual or group, the call will not receive coverage and the calling party will receive Busy Tone. Calls sent to coverage will continue to ring at single-line sender terminals but will cease ringing at multiline sender terminals. In the latter case, the calls will remain on the incoming call appearance button, and that button’s status LED continues to reflect the status of the call.
FEATURES AND SERVICES Considerations Coverage provides a way to redirect calls to alternate answering positions. The feature is versatile enough to permit suitable alternate answering arrangements for virtually every level of employee. Special functions, such as the Send All Calls feature, accommodate the dayto-day variations that occur in an employee’s work schedule. Interactions (Standard Group Coverage) The following features interact with Standard Group Coverage.
Coverage, Group When forwarding to an outside number, coverage may only occur in one case: the forwarding had been activated using a trunk group’s facility access code (not ARS), the forwarding cannot be completed because the trunk group is busy, and the forwarding station is not busy. In this case, the call will ring at the forwarding station and its coverage stations.
FEATURES AND SERVICES Callback Queuing: Callback calls to the originator do not send ring signals to its coverage stations. If a call is queued for a station, then one of the coverage stations becomes available, the call remains queued for the originally-dialed station. Direct Station Selection (DSS): A DSS button can be assigned to a DGC Coverage Group. The button lights whenever all DGC members are busy. Flex DSS: A Flex DSS button can be assigned to a DGC Coverage Group.
Coverage, Group Administration Requirements (Standard Group Coverage) System: ● Provide Coverage ringing on internal calls (yes or no; default = yes). If “no”, covered calls will flash but not ring at covering stations on internal calls. ● Number of rings before Coverage ringing starts on no answer (0-31; default = 2). The status LEDs on Group Coverage buttons at covering stations begin flashing immediately in all cases.
FEATURES AND SERVICES Coverage, Individual Description This feature is similar to Group Coverage, covered in the preceding feature description. The primary difference is that Individual Coverage is a one-on-one type coverage between pairs of stations. An Individual Coverage (COVER-IND) button can be assigned on multiline voice terminals to cover calls to a specific (single) voice terminal. The covering station can answer covered calls by selecting COVER-IND.
Coverage, Individual Interactions The following features interact with Individual Coverage. Attendant Console, Direct Trunk: When a coverage call rings at a busy Attendant Console, the attendant receives a single burst of ringing. If the call is still unanswered when the attendant hangs up the other call, the Attendant Console will resume ringing. Bridging of System Access Buttons: An incoming call is given individual coverage according to the coverage specified for the principal.
FEATURES AND SERVICES Administration Requirements Voice Terminal Port: ● 2-116 Individual Coverage button (button function # 12): — Individual Coverage PDC (1-9999). — Allow Ring (yes or no).
DS1 Facility Interface DS1 Facility Interface Description The DS1 facility interface feature provides connectivity between System 25 and a T1 facility. The DS1 facility is a transmission system to transport digital signals of the DS1 format. The System 25 forms voice signals using the DS1 format.
FEATURES AND SERVICES Signaling Types Signaling types refers to signaling used by DS1 on the T1 facility. Two signaling types can be used in System 25, Robbed-bit and Common Channel. Robbed-bit signaling (RBS) robs or replaces the least significant bit (of each DS0 channel’s 8-bit word in every 6th frame) with that channel’s signaling information. For D4 frame format, that means the 6th and 12th frame carry RBS. For ESF frame format, this means the 6th, 12th, 18th, and 24th frames carry RBS.
DS1 Facility Interface When digital signals are transmitted over a network of digital communications links, switching nodes, multiplexers, and transmission interfaces, all entities must be synchronized. This is referred to as network synchronization. For synchronous transmission, information is transmitted to the transmission facility at a fixed rate. Each bit occupies a fixed unit time interval. All significant transitions must correspond to multiples of the fixed unit time interval.
FEATURES AND SERVICES Non-AT&T Digital PBX Endpoints To determine if the System 25 can be connected to another vendor’s PBX, several items must be verified: ● The other vendor’s PBX must provide a DS1 interface as specified by AT&T. ● The other vendor’s PBX must provide at least one of the line coding, framing, and signaling options provided by the System 25. ● The other vendor’s PBX must implement the digital loss plan specified in EIA RS464/PN1378.
DS1 Facility Interface The trunks terminating on a 4ESS switch must be administered as either tie or direct inward dialing trunk types. The tie trunks can be either one-way or two-way; either immediate start, wink start or delay dial. The DID trunks are incoming only and wink start or immediate start. Some 4ESS switches do not provide secondary dial tone. It is recommended that System 25 provide the secondary dial tone.
FEATURES AND SERVICES synchronized to the AT&T Reference Frequency, then it can be used as the synchronization reference for the System 25. DS1 Interface Circuit Pack The TN767 circuit pack is the principal hardware element connecting System 25 to the T1 facility interface. Two DS1 circuit packs may be mounted in the System 25 cabinet(s). Each DS1 facility interface CP supports up to 24 trunks (23 if common channel signaling is used).
DS1 Facility Interface Administration Requirements The administration of DS1 interface CP is completed by accessing the Port, High Density Circuit (HI D CKT), and System entries of the main administration menu.
FEATURES AND SERVICES The items to administered under System include (default): ● Assign Primary Synchronization Source (No slot) ● Enable Automatic Synchronization Source Switching (enabled) Hardware Requirements Requires a TN767 CP plus ZTN131. The TN767 CP provides 24 ports.
DS1 Facility Interface 131O FEET MAXIMUM CABLING DISTANCE SYSTEM 25 SYSTEM 25 C6D CONNECTOR CABLE (NOTE) TN 767 < TN767 > NOTE: FOR DISTANCES OVER 50 FEET (15.2 M) USED C6E CONNECTOR CABLE(S) BETWEEN C6C CONNECTOR CABLE AND DS1 TIE TRUNK CIRCUIT PACK. Figure 2-15. Direct DS1 Connection Between System 25 Cabinets (Located 1310 Feet Apart, Maximum) S25 TN767 DSX-1 CSU CSU OFFICE REPEATER DSX-1 OFFICE REPEATER DS1 3000 FEET OR LESS 655 FEET MAXIMUM 655 FEET MAXIMUM Figure 2-16.
FEATURES AND SERVICES S25 TN767 DSX-1 CSU PROTECTION CIRCUIT (NOTE) 655 FEET MAXIMUM REPEATERED DS1 LINE CSU PROTECTION CIRCUIT DSX-1 DS1 (NOTE) 655 FEET MAXIMUM NOTE: USE OF THE OFFICE REPEATER IS OPTIONAL DEPENDING UPON THE DISTANCE TO THE FIRST T1 REPEATER Figure 2-17. System 25 Connection to DS1 Facility Located 4311 Feet or More Away S25 TN767 DSX-1 CSU 655 FEET MAXIMUM T1 LINE REPEATER 3000 FEET OR LESS CSU DS1 Figure 2-18.
DS1 Facility Interface S25 TN767 MICROWAVE INTERFACE LIGHT-GUIDE INTERFACE LIGHT-GUIDE INTERFACE DSX-1 DSX-1 655 FEET MAXIMUM Figure 2-19. MICROWAVE INTERFACE INFRARED INTERFACE INFRARED INTERFACE ANY DSX-1 INTERFACE ANY DSX-1 INTERFACE DS1 655 FEET MAXIMUM System 25 Connection to DS1 Facility (Non-Metallic Transmission Interface) C6C CONNECTOR CABLE (NOTE) SYSTEM 25 TN767 < 551 CSU > TB1 TO CO NOTE: FOR DISTANCES OVER 50 FEET (15.
FEATURES AND SERVICES Data Call Setup This feature allows a user to originate calls from a data terminal or a voice terminal. System 25 provides three methods of data calling: ● ● ● 2-128 Dialing from a data terminal, which is described in the “Data Terminal Dialing” feature description. Setting up data calls from a voice terminal, which is described in the “Transfer to Data” feature description.
Data Services Overview Data Services Overview System 25’s data features provide switched data transmission at up to 19,200 bps (RS-232 interface), and a 212A modem compatible conversion resource capable of handling data at 300 and 1200 bps. The system provides switched connections between data endpoints. These endpoints include data terminals, personal computers, multiport computers, and modems. Data endpoints are either digital data endpoints or analog data endpoints.
FEATURES AND SERVICES The following describes the categories and attributes of each: 1. DTE Devices This group of data endpoints have one thing in common: their interface configuration (although RS-232 control signal utilization varies significantly from terminal to terminal).
Data Services Overview b. ASCII Data Terminal With Keyboard This category can be subdivided into two classes: (1) basic terminals, and (2) intelligent, programmable data equipment such as personal computers. Basic terminals appear to the data port to be on-line and available whenever they are turned on, thus ready to enter either the Data Terminal Dialing mode. or to enter the Setup mode on calls originating from a voice terminal or on auto-answered calls.
FEATURES AND SERVICES endpoints is important for users who provide their own modems, connected to dedicated trunks or private lines, for internal modem pooling. Data Endpoint States The data endpoint may take on three states: (1) off-line, (2) on-line (on-hook), and (3) on-line (off-hook). Off-line is when a data terminal is out of service (turned off, disconnected, etc,). The on-line (on-hook) state occurs when the terminal is turned on, is available to answer a call, but is not on a data call.
Data Services Overview e. Data Terminal Dialing Mode Data Terminal Dialing is a data feature accessed via Command Mode. It provides a procedure to establish data calls without the use of a voice terminal. Data Terminal Dialing supports both on-premises and off-premises data calls (with the support of the System 25 Modem Pooling feature). Dialed digits are entered from the data terminal keyboard or host computer (using a program compatible with Data Terminal Dialing protocol).
FEATURES AND SERVICES b. Data Terminal Dialing Data Terminal Dialing provides call setup from terminals and host computers c. Transfer To Data Transfer To Data is the preferred method of data call origination from multiline voice terminals equipped with Transfer to Data (DATA) buttons and associated digital data endpoints. The DATA button is associated by DDC with a near end data endpoint. A unique DATA button must be provided for each DDC that the voice terminal is capable of controlling.
Data Terminal Dialing Data Terminal Dialing Description This feature allows users to onginate (place) data calls from a data terminal. Voice terminal dialing and call progress tones are replaced by keyboard dialing and call progress messages. The message “DIAL:”’ prompts the user to enter the called number from the keyboard, and “RINGING” or “DIALING ... COMPLETED” informs the user that the dialed number is being called. Table 2-1 provides a list of the call progress messages.
FEATURES AND SERVICES Pause characters may be used consecutively if a longer pause is required. Note that System 25 cannot detect tones, such as a second dial tone for end-to-end signaling. End-to-End Signaling: Data connections to off-premises destinations require that a conversion resource (pooled modem) be inserted into the connection. Occasionally it is necessary to send additional tones to the remote endpoint after the connection is established to signal the remote equipment.
Data Terminal Dialing Table 2-1. Call Progress Messages for Data Terminal Dialing Displayed Message DIAL: Application Placing a call RINGING Placing a call BUSY Placing a call ANSWERED Placing or receiving a call TRY AGAIN Placing a call INCOMING CALL-* Receiving a call Placing a call from PLEASE ANSa voice terminal DISCONNECTED* CONNECTED, SPEED = NNNN Call is terminated Call is connected INCOMPATIBLE FAR END DIALING . .
FEATURES AND SERVICES Answering Endpoint: When the dialed endpoint is alerted, the user receives “INCOMING CALL-”. (The called terminal will auto-answer if it is turned on.) If the handshake succeeds, a data connection is established and the “CONNECTED” message is displayed if so optioned. If the handshake fails, the user receives “INCOMPATIBLE FAR END, DISCONNECTED” and the data endpoint returns to idle mode.
Dial Access to Message Waiting Indicators Dial Access to Message Waiting Indicators Description This feature allows users to turn on or turn off the message waiting indicator on any voice terminal in the system by dialing a code. To turn on a Message LED at some station, the user first goes off-hook, or flashes the switchhook, to get dial tone. The user then dials activation code #90 followed by the extension number of the target station.
FEATURES AND SERVICES Dial Plan The dialing plan for System 25 is based on the concept that, whenever possible, calls should be placed to individuals rather than to voice terminals. To implement this concept, individuals are assigned Personal Dial Codes (PDCs) and are allowed to sign in those PDCs at other voice terminals. There are two types of PDCs: assigned and floating. An assigned PDC is associated with each voice terminal. Floating PDCs (FPDCs) may be signed in at any voice terminal.
Dial Plan ● ✶ — PAUSE character (in programmed numbers) ● #100-#189 — System Speed Dialing Codes ● #190-#199 — Virtual Facility Codes ● #20-#39 — Personal Speed Dialing Codes ● #4 — Activate Program mode ● #5 — Insert dialed digits here (in Virtual Facility numbers) ● #8 — Start end-to-end signaling (in programmed numbers) ● #60 — Activate Callback Queuing at single-line voice terminal ● #61 — Cancel Callback Queuing request at single-line voice terminal ● #70 — Activate Forwarding ● #
FEATURES AND SERVICES Data Dial Codes (DDCs) At the time of installation each digital data endpoint will be assigned a Data Dial Code (DDC) that serves as its extension number. A maximum of 104 DDCs may be allocated in a system. Direct Inward Dial (DID) Number Assignments Each DID number is associated with a unique PDC (floating or assigned), a DGC access code, a Remote Access point, a DDC, or a pooled facility access code.
Dictation System Access Dictation System Access Description This feature permits voice terminal users to access and control customer-owned dictation equipment. System 25 can provide an interface to dictation systems that require either an industry-standard station line port or an Auxiliary Trunk port with contact closure (equivalent to a push-to-talk switch). The dictation system is accessed by dialing the designated access code or by pressing a DSS button on which this access code is stored.
FEATURES AND SERVICES Voice Terminal Port: ● Assign DSS access buttons, as desired Hardware Requirements Customer-provided dictation equipment suitable for connection to a telephone system. Port on a ZTN78, TN742, or TN763 CP, as required. If the equipment requires a contact closure, the TN763 and supporting equipment must be used. Detailed connection information is provided in Figure 2-22.
Digital Tape Unit (DTU) Digital Tape Unit (DTU) The Digital Tape Unit (Figure 2-23) is a RS-232 device used to record administration translations. The DTU does not encode the translations data as it records, nor does it require decoding circuitry when playing back (restoring) recorded data. Data is recorded and transmitted at 1200 bps. The DTU requires 115V commercial power from a 3-wire grounded outlet. It should be located on a desk or table top.
FEATURES AND SERVICES SYSTEM 25 CABINET ZTN130 CPU/MEM PART OF OCTOPUS CABLE C2 PART OF SIP Z210A ADAPT. C1 355A/AF ADAPT. DIGITAL TAPE UNIT LEGEND: C1 C2 355A ADAPTER 355AF ADAPTER Figure 2-24.
Direct Group Calling (DGC) Direct Group Calling (DGC) Description Direct Group Calling (DGC) allows incoming calls to be directed to a specific group of telephones. Up to 32 DGC groups, each including up to 20 members, may be set up. Each DGC group can have its own individual (unique) announcement. A terminal can be in only one DGC group. Incoming calls on particular trunks can be directed to a DGC group. These trunks can also be used for outgoing calls.
FEATURES AND SERVICES Considerations DGC groups are particularly useful when the answering group receives a high volume of calls. Call completion time is minimized and attendant assistance is not required. Any number of outside trunks may be administered to feed into a DGC group. A trunk may feed only one DGC group. Interactions The following features interact with Direct Group Calling.
Direct Group Calling (DGC) Personal Lines: An outside line directed to a DGC group can be assigned button appearances in addition to the DGC group assignment. When an incoming call is ringing at a DGC group, the status LED on the voice terminal button appearance lights steadily, indicating that the line is busy.
FEATURES AND SERVICES Direct Group Calling Delay Announcement Description This feature provides a recorded announcement to an outside (trunk) caller who has been placed in queue for a DGC Group. When all members in the group are busy (off-hook), the call will be queued for DGC service and the calling party will receive ringback tone. Note that no incoming call indication (ringing) is provided to the DGC group members at this point.
Direct Group Calling Delay Announcement Hardware Requirements The announcement device must automatically hang up at the end of each call so that the incoming call can be returned to the DGC queue. Each announcement device requires a port on a ZTN78 Tip Ring Line (or TN742 Analog Line) CP. The system supports up to 32 DGC delay announcements. For Music-On-Hold hardware information, refer to the “Music-On-Hold” feature description. Detailed connection information is provided in Figure 2-25.
FEATURES AND SERVICES Direct Inward Dialing (DID) Description Direct Inward Dialing (DID) allows incoming dial pulse type calls to reach specific individuals or facilities in the system without attendant assistance. System 25 customers reserve blocks of DID numbers from the CO. The DID numbers may correspond to a PDC, FPDC, DGC access code, DDC, or any facility with an access code such as a pooled facility or a paging zone. The system is capable of receiving either 1, 2, 3, or 4 digits over its DID trunks.
Direct Inward Dialing (DID) Interactions The following features interact with Direct Inward Dialing. Attendant Camp-On: DID calls are not provided Attendant Camp-On treatment. They will not appear on the Direct Trunk Attendant Console Return-On-Busy or Return-On-Don’t-Answer buttons or on the Switched Loop Attendant Console Loop buttons unless they are first answered at the attendant position and are subsequently extended by the attendant.
FEATURES AND SERVICES Pooled Facility Access: Access to pooled facilities via DID is permitted. This includes access to WATS, FX, tie trunks, private lines, dictation equipment, and paging systems. This access is provided by selecting facility access codes so that they will match DID numbers. Warning: Matching DID numbers to FACs may open the way for unauthorized calls which will be billed to the outgoing trunk. Remote Access: A valid DID number can be assigned for Remote Access calls into the system.
Directory Directory Description This feature allows the user of a voice terminal where the Display feature is administered to search the system’s integrated directory data base for the extension numbers associated with specific names. Information resulting from the use of Directory is displayed on the voice terminal’s screen. The user enters Directory Mode from Normal Mode by pressing the DIRECTORY button.
FEATURES AND SERVICES The user of a non-attendant display set can exit from Directory Mode directly to Program Mode by moving the program switch on the left side of the terminal to position P. However, to reenter Directory, the user must first go from Program to Normal and then press DIRECTORY. The user can return from Directory Mode to either Normal Mode or Local Mode by any of the following actions: ● Press DIRECTORY again.
Directory Administration Requirements Administration of the Display feature enables Directory.
FEATURES AND SERVICES Direct Station Selection (DSS) Description Direct Station Selection (DSS) allows one-button access to another voice terminal, a paging zone, or a DGC Group. DSS requires a button assignment on a multiline voice terminal. There are two types of DSS buttons. Numbers stored on DSS buttons (maximum of four digits) are programmed at the SAT; numbers stored on Flexible DSS buttons (maximum of four digits) are programmed at the voice terminal.
Direct Station Selection (DSS) Coverage: DSS calls placed to an individual with Coverage will receive standard coverage treatment. Display: Operation of a programmed FLEX DSS button generates a display of the information stored on the button: if the button is not programmed, NO INFORMATION is displayed. Direct Group Calling: A DSS button can be assigned to a DGC group. The associated LED lights steadily when all stations in the group are busy.
FEATURES AND SERVICES Display Description This feature provides visual alphanumeric call information at multiline voice terminals equipped with display modules. The Display feature also provides support for the Directory, Inspection, Local Display, and Program features, which are all covered in separate feature descriptions.
Display Display Operation Modes Most normal call handling activity, such as placing and answering calls and using features, takes place in “Normal Mode.” Call displays in this mode require no manual action by the user except for operation of the SCROLL button to display Screen 2 in certain types of calls.
FEATURES AND SERVICES routing information, System Speed Dialing numbers, etc.] is not displayed to the terminal user. ● Displays for redirected/coverage and returning/third-party calls have the following formats: — Screen 1 contains either information about the called party (usually a station or DGC group) or a feature descriptor that explains why the call has come to this station (for example, PARK RTN or NIGHT SERVICE).
Display Special Descriptors The descriptors summarized in Table 2-J appear on displays to provide special information about calls. These symbols consist of upper-case and lower-case letters and other typographical characters. Descriptors on Screen 2 must be interpreted with respect to the contents of Screen 1. Table 2-J. Location Descriptor Screen 1/Position 1 Screen 1/ Positions 15 and 16 (If position 15 is blank, check for one of the descriptors in next block.
FEATURES AND SERVICES Standard Call Displays The following basic displays illustrate the arrangement of information on the screen(s) for some of the most common types of calls. ● Origination or Reception of Inside Calls When a display telephone set user places or receives an inside call, the other party’s extension number appears in positions 1-4 and name (if administered) in positions 614.
Display number and name; the call type designator appears in position 16 (here, “b” indicates that the covered party was busy). ● Screen 1 >344 Carter,L Screen 2 798 Bradshaw b Reception of Returning or Third-Party Calls Screen 1 identifies either where the call is returning from or the destination of the third-party call. Screen 2 presents identification of either the calling party on the returning call or the data terminal that set up the third-party call.
FEATURES AND SERVICES ● — The system time-out for Account Code Entry is reached. — The user selects another button that overwrites the display. Busy-To-Idle Reminder When a user receives this signal, the display format is the same as when the call was originally placed, except that idle descriptor “I” appears in position 1. Number and name fields are displaced to the right.
Display ● FLEX DSS Button Operation Operation of a FLEX DSS button that is not programmed with an extension number generates the display NO INFORMATION. ● Forwarding Reception of a forwarded call follows the standard format for a redirected call, with the call type descriptor “f” in position 16 of Screen 2. A forwarding display station receives abbreviated alert when a call is forwarded to an outside number; the display is flashed on Screen 1 only.
FEATURES AND SERVICES ● Send All Calls When Send All Calls is invoked, the sending station still receives incoming call information. If the calls are being sent to coverage, the proceeding-to-coverage descriptor “c” appears in position 16. Screen 1 ● 146 Pearson,M c Transfer At a station receiving a transferred call, the transfer descriptor “T” is displayed in position 1 before the transfer is completed. The transferring party’s number and name are also shown.
Display Considerations The Display feature provides valuable call information with a minimum of effort on the part of the voice terminal user. Interactions The following features interact with Display Capabilities. Attendant Console, Direct Trunk: Display capabilities are not supported for this type of console.
FEATURES AND SERVICES When a nondisplay station originates a trunk call, then conferences the call with an inside display station and drops off the display shows the trunk name only, not the originally-dialed digits. Message Waiting Indications: When a display set user dials #90 (or #91) followed by an extension number to light (or extinguish) a Message LED at some station, the dialed digits are displayed. A confirmation of Message LED activation or deactivation is not displayed.
Distinctive Ringing Distinctive Ringing Description This feature allows users to distinguish between different types of incoming calls. The system provides the following types of ringing: ● A repeated two-burst tone indicates an outside call or a call extended by the attendant. The two-burst tone pattern is: 0.4 seconds on, 0.2 seconds off, 0.6 seconds on, and 4.0 seconds off. ● A repeated one-burst pattern indicates a call from an internal user.
FEATURES AND SERVICES End-To-End Signaling Description This feature allows multiline voice terminals to send touch-tone (DTMF) signals over the DDD network and allows single-line and multiline users to send touch-tones over dial pulse trunks. The 7300H series voice terminals do not generate touch-tones when a dial pad button is pressed. The End-to-End Signaling feature provides for the conversion of signals generated by these terminals to touch-tones.
Exclusion Exclusion Description This feature allows multiline voice terminal users to keep other users with appearances of the same Personal Line from listening in on or interrupting their calls. It can also be used in a Principal Station/Bridging Station arrangement by either party to exclude other inside stations from a private call. Exclusion allows users to exclude the attendant and other stations from an existing or held call, or to drop other System 25 users from a call.
FEATURES AND SERVICES Coverage: If a coverage receiver invokes Exclusion after answering a coverage call, all other terminals (including the attendant and the covered station) are excluded. The covered user cannot enter the call until Exclusion is pressed a second time by the covering user. Display: When a display station attempts to enter a personal line or bridged appearance that has the Exclusion feature in effect, EXCLUDED is displayed. Hold: A call can be placed on hold after Exclusion is invoked.
Expert Mode Expert Mode Description Expert Mode is an enhancement to the Command Mode feature that provides an alternative method of performing the full range of Command Mode functions. By eliminating the display of menus and allowing multiple commands to be entered on a single line, Expert Mode lends itself to computer-driven instructions. Individual users who are very familiar with Command Mode operations may also find it useful.
FEATURES AND SERVICES If the user enters “D” and then a RETURN, the system will prompt for the data endpoint number as follows: Command: D DIAL: The user must then enter the digits required to complete the call. Activating the Third-Party Call Setup Feature The following provides an abbreviated method of using the Third-Party Call Setup feature while in the Expert Mode. A complete description of this feature is provided later in this manual.
Expert Mode Examples: Command: S +1200 -300 +4800 Add 1200 and 4800 baud to the available speeds, remove 300 baud Command: PE Change Parity to Even Command: MY Change Mismatch to Yes If the user enters an invalid Option or setting, the system responds with INVALID OPTION and the entry is ignored. Once all changes have been entered, the user enters XE to enable the options.
Features and Services Extended Stations Description Allows single-line voice terminals to be located at distances from 2000 to 17,500 feet from the systems cabinets. Extended stations have the same feature capability as other voice terminals. These stations count as an outside party on conference calls. Transmit and receive levels are increased at extended stations for conferencing. Considerations A single-line voice terminal must be administered as an extended station before this feature is activated.
External Alerts External Alerts Description External Alerts provide standard station ringing at locations away from the called stations. This feature can be used to activate an external alerting device such as a bell. External Alerts supports the Trunk-Answer-from-Any-Station (TAAS) form of Night Service. The feature can be used in conjunction with voice terminals located in noisy environments and large areas such as warehouses, etc.
FEATURES AND SERVICES Hardware Requirements Order line-activated alerting devices (e.g., bells) as required. An alerting device operating on a line separate from a terminal requires a port interface on a ZTN78 or TN742. Refer to Figure 2-26 for connection information. Order the Supplemental Alert Adapter (PEC 2301-SAA) for controlling a remote alerting device. A Supplemental Alert Adapter is installed in the line between the port CP and the user’s MERLIN System terminal.
External Alerts SYSTEM 25 CABINET ZTN79 ATL LINE CP PART OF OCTOPUS CABLE C2 PART OF SIP > SIP ADAPT. W1 S1 ALERT C8 B1 < C1 C1 TERMINAL T1 ALERTER C.U. V.T. A1 LEGEND : A1 - SUPPLEMENTAL ALERT ADAPTER - PEC 2301-SAA B1 - TYPICAL - 103A CONNECTING BLOCK* C1 - MODULAR CORD (D8W-87) C2 - OCTOPUS CABLE (WP90780) C8 - MODULAR CORD (D4BU-87) S1 - EXTERNAL ALERT T1 - HYBRID TYPE TERMINAL W1 - 4-PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER Figure 2-27.
FEATURES AND SERVICES Following Description This feature allows users who are away from their own voice terminals to receive their calls at other inside voice terminals. Following is functionally equivalent to internal Forwarding. In order to have their calls follow them, users sign in their PDCs at the terminals where they will be located temporarily. A call coming into the “home” terminal is redirected to the terminal where the PDC is signed in (the “away” terminal).
Following Calls Placed to A PDC: Calls to a PDC that is not signed in at an “away” terminal are directed to the home terminal and receive that terminal’s normal hunting or coverage treatment. If a PDC is signed in at an away terminal, calls placed to the PDC fall into one of the following categories: ● The general case— calls placed from terminals other than the away terminal ● A special case— call placed from the away terminal.
FEATURES AND SERVICES instead be provided Reorder Tone. Finally, if the FPDC is not signed in, and if the attendant position is not administered to handle these calls, then the calling party will receive Reorder Tone. For non-DID calls if an invalid FPDC is dialed, then the calling party will receive Reorder Tone. If a DID call does not match any assigned number in the dialing plan, it will be directed to the attendant or to Reorder Tone, as administered.
Forwarding Forwarding Description This feature allows users to direct their incoming calls to another (forwarded-to) voice terminal where they will be located temporarily. Calls can be forwarded to inside stations or to locations outside System 25. Figure 2-28 is a simplified block diagram of this feature. FORWARDING STATION CALLING STATION Figure 2-28. FORWARDED-TO STATION Stages of Call Forwarding Forwarding is similar to the Following feature.
FEATURES AND SERVICES Waiting is administered at the forwarded-to station. Forwarding Calls to Locations Outside System 25 The user activates Forwarding to an outside station in one of the following ways: ● By dialing feature access code #70, the single-digit ARS access code, and the forward-to number, then hanging up after hearing confirmation tone. ● By dialing feature access code #70, a pooled facility (trunk) access code, and the forward-to number, then hanging up after hearing confirmation tone.
Forwarding After dialing the Remote Access trunk and the barrier code, the caller receives second dial tone. The caller then enters access code #70 and the PDC of the forwarding station; confirmation tone followed by silence is returned if a valid PDC was dialed. Finally, the remote caller dials the outside forward-to number and hears confirmation tone. To cancel Remote Access Forwarding, the remote caller repeats the activation procedure but substitutes “0” for the outside forward-to number.
FEATURES AND SERVICES A given station can receive forwarded calls from any number of other stations. Note: When incoming trunk calls are forwarded to outside locations, severe attenuation of the voice signal may occur. Interactions The following features interact with Forwarding. Account Code Entry, Forced: Stations with this feature administered for all calls cannot forward calls to any outside numbers.
Forwarding Display: Reception of a forwarded call follows the standard format for a redirected call, with the call type descriptor “f” in position 16 of Screen 2. A forwarding display station receives abbreviated alert when a call is forwarded to an outside number; the display is flashed on Screen 1 only. The new forwarding descriptor “F” appears in position 1, followed by the digits of the outside number.
Features and Services Trunk Groups, Loop Start: If System 25 uses Loop Start trunks, calls can be forwarded to remote locations only if Trunk-to-Trunk Transfer has been administered for Loop Start trunks. Administration Requirements Voice Terminal Port: ● 2-190 Allow this station to toward calls to outside locations? (yes or no; default = no).
Hands-Free Answer on Intercom (HFAI) Hands-Free Answer on Intercom (HFAI) Description This feature allows the following voice terminals to provide hands-free answer service on eligible incoming calls; each terminal must have Automatic Answer (AUTO ANS) assigned to a flexible button. ● BIS (7305H03B, 7305H04C, 7313H01A, 7314H01A, 7316H01A, and 7317H01A) and HFAI (7309H01A); these sets provide full service without requiring adjuncts.
FEATURES AND SERVICES — The set generates a tone burst over its speaker to indicate an incoming call. — The parties may converse. The called party can speak in a normal voice toward the set. No other action by the called party is required. — During the call, the called party can press the HFAI/Mic or MICROPHONE button to mute the microphone temporarily and prevent the caller from hearing. Pressing the button again turns the microphone on again.
Hands-Free Answer on Intercom (HFAI) Voice Terminals without Speakerphone or Headset Adapters The HFAI feature is activated by pressing the AUTO ANS button. A beep signal announces an incoming call and the SPEAKER LED lights. A one-way talking link is established from the caller to the terminal; the user can hear the caller but cannot converse. Lifting the handset connects the user to the caller.
FEATURES AND SERVICES Headset Adapter Adjunct Description The headset adapter adjunct is an interface device for connecting a headset to an associated voice terminal. A headset plugged into the adapter is activated by switches on the adapter. The terminal operator has the choice of using either the handset or the headset for handling calls. Turning the headset on and off is equivalent to lifting and hanging up the handset.
Headset Adapter Adjunct The 500A Headset Adapter is powered locally by a 2012D Transformer, which plugs into a 115V ac receptacle. Power from the transformer is applied to the voice terminal mounting cord via a 400B2 adapter at the wall jack and conducted to the 500A on its connecting cord. Refer to “Voice Terminal Adjunct Power Supplies” in Section 4 for additional information.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP PART OF SIP C2 SIP ADAPT.
Headset Adapter Adjunct SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP PART OF SIP C2 SIP ADAPT. W1 B1 Z400F ADAPT. C1 VOICE TERMINAL T1 C7 C8 PWR.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE TN735 MET LINE CP PART OF SIP C2 SIP ADAPT. W1 C1 B1 C7 248B ADAPT.
Hold Hold Description This feature allows users to temporarily disconnect from one call and either place or answer another call. A single-line voice terminal user can place only one call on hold and must remain off-hook to retain the held call. A multiline voice terminal user can place as many calls on hold as it has lines and can hang up without losing held calls. Single-line users can place a call on hold by flashing the switchhook (the user receives Confirmation Tone).
FEATURES AND SERVICES Music-On-Hold: A held party on an outside line will receive Music-On-Hold if provided. Personal Lines: A Personal Line cannot be placed on hold if any other stations are also offhook on that line. Remote Access: Remote Access callers cannot use the Hold feature.
Inspection Inspection Description This feature enables the user at any voice terminal administered for the Display feature to perform the following functions: ● View incoming call identification messages even while busy on another call. ● View information about held or bridged calls. ● Examine information stored on REP DIAL, FLEX DSS, and LAST # DIALED buttons. ● Determine the busy status of pooled trunk groups. ● Determine feature button type.
FEATURES AND SERVICES ● Active Call Appearance Button The normal call information pertaining to the call is displayed. If the display user is excluded, EXCLUDED is displayed. ● FLEX DSS Button The stored number and the associated name are displayed. If the button is not programmed, FLEX DSS is displayed. ● REP DIAL Button The digits stored on the button are displayed. If the button is not programmed, REP DIAL is displayed.
Inspection The user of a non-attendant display set can exit from Inspection directly to Program Mode by activating the Program switch. However, to reenter Inspection, the user must first go from Program to Normal, then enter Inspection Mode. Administration Requirements Administration of the Display feature enables Inspection. Hardware Requirements The Inspection feature can be used only at display-equipped multiline voice terminals.
Features and Services Integrated Solution (IS) Description This feature is the enhancement to System 25 with a UNIX®-based computer (PC) acting as a Master Controller. The PC is a multi-tasking computer which provides the following options: ● Basic Administration System (Included with IS): Basic Administration (BAS) allows you to add, move, and change your telephone system to meet the demands of your business. This is accomplished through the default administration interface of System 25.
Integrated Solution For Office Automation applications, there are no absolute requirements, but the customer’s needs should be understood. For example, most customers who need word processing also would like a letter-quality printer. A serial interfaced printer should be recommended due to the ease with which serial ports may be added to the PC. Most serial printers will require a null modem cable such as our PEC 2724-91G or 2724-92G. Any AVP application will require at least one VOICE POWER board.
Features and Services Hardware Requirements Requires appropriate cables and connectors for Administration and/or Call Accounting Descriptions of the SIP (Station Interconnect Panel), TAE (Trunk Access Equipment), and associated cables and adapters are provided under the heading “Connectivity” in Section 4 of this manual.
Intercept Treatment With Reorder Tones Intercept Treatment With Reorder Tones Description Reorder tone (fast busy) is provided when a call cannot be completed (for example when an unassigned or toll-restricted number is dialed, a dialing error occurs, a requested trunk group is busy, or an attempt to park a call falls). Calls to FPDCs that are not signed-in anywhere or to unassigned DID numbers will be routed to the attendant or will receive Reorder Tone, at the System Administrator’s option.
FEATURES AND SERVICES Interdigit Timeouts Description This feature allows an originating register to be made available for others if dialing is not completed within a set time period. Interdigit timeouts is 24 seconds until the first five digits have been dialed, 10 seconds until the next five digits have been dialed, and five seconds thereafter.
Last Number Dialed Last Number Dialed Description Last Number Dialed automatically saves the last number dialed from a multiline voice terminal or ATL cordless telephone and allows the user to place the call again without manually redialing the number. The feature is administered to a button on the terminal. Both inside and outside calls can be made in this way. The original call can be placed by manual dialing, by operation of a programmed button, or by Speed Dialing.
FEATURES AND SERVICES currently stored on the button. Automatic Intercom: Numbers called using an Automatic Intercom button are not saved by the Last Number Dialed feature. The number currently stored by Last Number Dialed is not changed by operations of the Automatic Intercom button. Bridging of System Access Buttons: The Last Number Dialed feature saves numbers called from either Bridged Access buttons or System Access buttons.
Last Number Dialed Administration Requirements Last Number Dialed is a default feature on all multiline voice terminals. One button is assigned to the feature at each set. The feature can be moved or removed by administration.
FEATURES AND SERVICES Leave Word Calling Description Leave Word Calling (LWC) is available only when a Voice Message System (VMS) is connected to the System 25; the VMS provides the message processing and voice synthesizing facilities used by LWC. The interface between System 25 and VMS requires administration of special ports on analog tip/ring circuit packs. LWC enhances the messaging capabilities of System 25 by enabling users to generate “call me” voice messages for PDCs and FPDCs.
Leave Word Calling (LWC) Considerations System 25’s Leave Word Calling feature provides an easy method to send “call me” messages by way of an attached VMS. When the feature is activated, caller and called party information is delivered to the VMS, which lights the Message LED of the called party and then prepares a brief message containing the caller’s name and extension. The called party can retrieve the message at his/her convenience. Multiline voice terminals cannot use dial code #92 to activate LWC.
FEATURES AND SERVICES Hardware Requirements A Voice Message System must be connected to the System 25 by way of a port on a ZTN78 Tip Ring Line circuit pack. Use of a TN742 Analog Line circuit pack for VMS interface is not recommended.
Line Selection Line Selection Description Multiline voice terminals may have many line (facility) appearances. There are three methods by which a user may select a desired line: (1) Prime Line Preference, (2) Ringing Line Preference, and (3) Preselection. Prime Line Preference: Automatically connects a multiline voice terminal to a specified line or facility designated as preferred when the terminal goes off-hook.
FEATURES AND SERVICES If a line rings at a multiline terminal when the terminal is busy on another call, Ringing Line Preference will not activate, even if the user goes on-hook during the ringing cycle. However, Ringing Line Preference is not canceled at the Attendant Console while the attendant is off-hook. If a line is ringing while the attendant is off-hook, the ringing line will be selected as soon as the attendant goes on-hook.
Line Selection Power Failure/Cold Start: On power-up, most multiline voice terminals will have no I-use LED lit and will not draw dial tone until a button is pressed. After this, line selection should work as described above. Administration Requirements Voice Terminal Port: ● Prime Line Preference: Assign Prime Line Preference; default = top SYSTEM ACCESS button or top LOOP button (Switched Loop Attendant Console only).
FEATURES AND SERVICES Line Status and I-use Indications Description Provides users with a usual indication of the status of feature buttons and lines appearing at a their multiline terminals. A green status LED and a red I-Use LED are provided for each programmable button on most multiline voice terminals. Table 2-K summarizes LED states and associated descriptions for line appearances. Table 2-K. I-Use (Red LED) LED Indications Meaning Line Status (Green LED) Off Off Facility is idle.
Line Status and I-Use Indications Interactions The following features interact with Line Status and I-Use Indications. Attendant Console, Direct Trunk: When a line that appears at both the attendant position and a multiline voice terminal is placed on hold by the terminal user, the green status LED winks at the terminal but lights steadily on the Attendant Console. When the line is placed on hold by the attendant, the green status LED winks on the console and on voice terminals on which it appears.
FEATURES AND SERVICES Local Display Description This feature allows the user of a display-equipped voice terminal to operate the Time/Timer circuit built into the display module. The voice terminal must be in the “Local Mode” for use of Local Display. The Timer has Set, Start, Fwd (Forward), Stop, Rev (Reverse), Time/Timer, and Exit buttons to control the visible clock, calendar, and 60-minute timer displays and an audible alarm.
Local Display The terminal user can set any of the Local Display functions by performing the following procedure while not active on a call: 1. If the clock/calendar screen is not already being displayed, press LOCAL (or Time/Timer if the terminal has no LOCAL button). The clock/calendar screen appears on the display 2. Press Set repeatedly, until the item to be changed flashes. 3. Press Fwd or Rev to change the item’s setting. 4. To change the setting of another item, return to step 2. 5.
FEATURES AND SERVICES Hardware Requirements The Local Display feature is available only on display-equipped multiline voice terminals.
Manual Signaling Manual Signaling Description This feature allows a user to signal another voice terminal. The user may do this at any time, whether on-hook or off-hook. In voice terminal user guides, this feature is called “Signaling.” Multiline voice terminal users can signal another predesignated multiline voice terminal by pressing an associated Manual Signaling (SIGNAL) button. A single tone burst is provided at the signaled terminal.
FEATURES AND SERVICES Administration Requirements Voice Terminal Port: ● Assign Manual Signaling (SIGNAL) button 2-224
Message Center-Like Operation (SLAC Only) Message Center-Like Operation (SLAC Only) Description A System 25 Switched Loop Attendant Console (SLAC) can be made to function like a message center through administration of call type translations. Certain specific types of calls in the common queue will then be directed only to a console administered as a message center. This arrangement involves no changes in equipment or in operating procedures.
FEATURES AND SERVICES Message Center capability can configurations: be supported in any of the following two-console ● One dedicated Attendant Position and one dedicated Message Center. A call extended by the Attendant Position to a station that does not answer or is busy returns to the Message Center. ● One dedicated Attendant Position and one combined Attendant Position/Message Center; the Attendant at the combined position also functions as the Message Center operator for the entire system.
Messaging Services Messaging Services Description These services include features that light a Message LED to indicate that another station or the attendant) has a message for the user. The Messaging Services provide light activation/deactivation only. Users must call the sender to receive their messages.
FEATURES AND SERVICES If a user tries to turn on the Message LED at a voice terminal for which the user does not provide Individual Coverage, Reorder Tone is received. Refer to the “Coverage, Individual” feature description for additional information. Dial Access to Message Waiting Indicators This service allows users to turn on or off the built-in Message LED (or Z3A Message Waiting Indicator adjunct) of any voice terminal in the system (including their own). Access is by way of dial codes.
Messaging Services Hardware Requirements The Z3A Message Waiting Indicator (MD), if available, can be used on single-line voice terminals not equipped with built-in Message LEDs.
FEATURES AND SERVICES Modem Pooling Description Allows switched data connections between digital data endpoints and analog data endpoints. (Refer also to the discussion of the system’s data features provided in the “Data Services Overview” feature description.) Data transmission between digital and analog endpoints requires a conversion resource since the digital format used by the data module is not compatible with the modulated signals of an analog modem.
Modem Pooling Conversion resources are requlred for: ● Data Terminal Dialing: To establish a data connection for calls originated via Terminal Dialing to intrapremises analog data endpoints. ● Incoming Trunk Calls: To establish a data connection between an incoming trunk call and a digital endpoint. Incoming trunk calls that are answered at a voice terminal can be transferred to a data endpoint using the Transfer To Data feature.
FEATURES AND SERVICES Administration Requirements System (Pooled Modems): ● Modem Request Code (1-9999; default = 820). Allows users to indicate a need for a conversion resource on a data call originated at an analog data endpoint. ● Receiver Responds To Remote Loop (yes or no; default = yes). When active, Data Set Ready is asserted when the modem is in an analog loop test mode. ● Disconnect On Loss Of Carrier (yes or no; default = yes).
Music-On-Hold Music-On-Hold Description This feature provides music or other audible indication to a held party on an outside line On an outside call, if the user places the call on Hold, or after a call into a DGC group receives the delay announcement, music is provided to the calling party. If a caller receives music because all members of a DGC group are busy, when a group member becomes available to answer the call, music is removed and the calling party is connected to the DGC member.
FEATURES AND SERVICES Park: Parked calls (except parked conferences) receive music. Transfer: When a station user transfers a call to another station, the transferred party is put on “special hold” until the process has been completed. If Music-On-Hold has been administered for the special hold condition, the transferred party hears music during the hold Interval.
Music-On-Hold SYSTEM 25 CABINET PART OF OCTOPUS CABLE TN742 OR ZTN78 C2 PART OF SIP > SIP ADAPT. W1 MOH W1 B1 C5 > MUSIC SOURCE LEGEND: TN742 ZTN78 B1 C2 C5 W1 MOH - ANALOG LINE CP TIP RING CP TYPICAL-103A CONNECTING BLOCK* OCTOPUS CABLE (WP90780) - PEC 2720-05P MODULAR CORD (D4BU-87) 4-PAIR INSIDE WIRING CABLE* KS-23395 MUSIC-ON-HOLD INTERFACE UNIT - PEC 62517 * - FURNISHED BY INSTALLER Figure 2-33.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE PART OF SIP TN742 OR ZTN78 C2 SIP ADAPT.
Night Service Night Service Description Allows users to answer incoming calls on specified trunks when the attendant is not on duty There are two types of Night Service (NS): ● Directed NS: Redirects incoming calls on specified trunks to designated voice terminals. ● Trunk-Answer-from-Any-Station (TAAS) NS: Allows users to answer incoming calls on specified trunks by dialing the Night Service access code. Both types of NS may be provided (specified on a per-trunk basis).
FEATURES AND SERVICES Note that at least one station must be designated as a NS receiver for this feature to work properly. If only an announcement is required, administer the announcement device as a station and make this station the NS receiver. Refer to the “Night Service Delay Announcement” information on the delay announcement. feature description for additional Trunk-Answer-from-Any-Station: Allows any user to answer NS calls.
Night Service Tie Trunks: Dial-in Tie Trunks cannot be given night service treatment. Administration Requirements Trunk Ports: ● Assign trunk Class of Service with Night Service (8-15). Note: ● A Remote Access trunk must not be administered for either form of Night Service treatment. Assign Directed Night Service trunk (yes or no; default = yes). Voice Terminal Port: ● Directed NS — Add Night Service trunk number to station list.
FEATURES AND SERVICES Night Service Delay Announcements Description This feature provides a recorded announcement for incoming trunk calls when the system has Directed Night Service (NS) activated and a call is not answered. Directed NS calls not answered within a specified number of rings (1-15) may be directed to a recorded announcement. Two different recorded announcements may be assigned.
Night Service Delay Announcements Hardware Requirements A suitable announcement machine is required for each announcement and must be connected to a port on a ZTN78 Tip Ring Line (or TN742 Analog Line) CP. The system supports two Directed Night Service delay announcements. Detailed connection information is provided in Figure 2-35.
FEATURES AND SERVICES Off-Premises Stations (OPS) Description An Off-Premises Station (OPS) is a single-line voice terminal that is located in another building and connected to System 25 via arrangements with the local CO. The station has the same features as an on-premises single-line station except that it is counted as an outside party in a conference call. Also, the Message feature will not operate with these sets. Considerations This service is sometimes furnished to executives at their residences.
Out-of-Building Stations Out-of-Building Stations Description Single-line voice terminals and multiline 7300H series terminals may be directly connected to the system even though they are not located in the same building. For 7300H series terminals, special In-Range Out-of-Building (IROB) units are used to protect the switch and its users from lightning, power crosses, etc. Out-of-Building Stations can access all system features.
Features and Services Paging System Access Description This feature provides users with dial access or feature button access to paging equipment. System 25 can provide an interface to paging systems that require a ground start trunk port, a loop start trunk port, or an industry-standard tip/ring station line port. The exact interface depends upon the paging system’s requirements.
Paging System Access System 25 supports all AT&T PagePac* voice paging systems. The following are the most common interface arrangements for System 25 and AT&T voice paging systems. PagePac 20 (with ZoneMate): This paging system interfaces with either a ground start or loop start trunk port. No additional equipment is required. Zone paging is provided by the ZoneMate. PagePac 20 (without ZoneMate): The PagePac 20 PowerMate may be used alone as a single zone paging amplifier.
FEATURES AND SERVICES Tie Trunks: Incoming Tie Trunk calls can access paging ports connected to Auxiliary Trunk circuit packs. If administered as a Tandem Trunk, an incoming Tie Trunk can also access other types of paging ports. Administration Requirements Ground Start or Loop Start Trunk Port: ● Requires a port on a ZTN76 Ground Start Trunk CP or ZTN77 Loop Start Trunk CP for each interface required.
Paging System Access Detailed connection information is provided in Figures 2-36 and 2-37. Descriptions of the SIP (Station Interconnect Panel), TAE (Trunk Access Equipment), and associated cables and adapters are provided under the heading “Connectivity” in Section 4 of this manual.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF 25-PAIR CABLE PART OF 66-BLOCK TN763 A W1 278A ADAPTER W1 C5 B1 PAGING OR DICTATION SYSTEM C6 D-181321 ZENER KIT C6 48V DC P1 LEGEND: TN763 A B1 C5 C6 P1 W1 - AUXILIARY TRUNK CP SINGLE-ENDED 25-PAIR CONNECTOR CABLE (A25D) (NOTE 1) TYPICAL - 103A CONNECTING BLOCK* MODULAR CORD (D4BU-87)* SINGLE-ENDED MODULAR CORD (DYB4) (NOTE 2) KS-22911, L1, POWER SUPPLY, 48 VOLT DC (NOTE 2) 4-PAIR INSIDE WIRING CABLE* NOTES : 1.
Park Park Description This feature allows a user to put a call into a special hold/parked condition so that it can be picked up from any voice terminal in the system. It is used in three typical applications: ● Basic Park: A user parks a call and then picks it up at another voice terminal. ● Meet-Me-Conference: A conference member parks the conference and pages another employee to join the conference. ● Transfer: A user parks a call and then pages another employee to pick up the call.
FEATURES AND SERVICES pressing an idle Park button. The status LED of the parked line on the Attendant Console winks and the status LED of the Park button on the Selector Console lights steadily. A call parked with the Selector Console is retrieved by dialing ✶ 8 and the access code assigned to the dedicated Park button.
Park Callback Queuing: Queued calls cannot be parked unless they are part of a conference. Reorder tone is returned whenever an illegal park is attempted, but the queued call is not disconnected. If parked conference members drop out, leaving only a queued call, it will be disconnected to prevent the illegal condition of a single queued call being parked.
FEATURES AND SERVICES Personal Dial Code (PDC) Description A Personal Dial Code (PDC) consisting of one to four digits is assigned to each voice terminal in the system. The PDC serves as the “extension number” of its terminal. Each PDC can also be associated, through system administration, with the name of the terminal’s user; terminals that have no specific users, such as lobby or conference room sets, can be assigned appropriate place or function names.
Personal Dial Code (PDC) Direct Station Selection: If an attempt is made to program a FPDC (rather than a PDC) on a Flex DSS button, Reorder Tone is received. Display: Calls to a FPDC signed in at a station covered by an attendant console receive coverage. However, the attendant display will show the PDC and name of the covered station, not the FPDC. Administration Requirements System: ● Route calls for unassigned DID numbers to the Attendant (yes or no; default = yes).
FEATURES AND SERVICES Personal Lines Description This feature provides a dedicated outside line for multiline voice terminal or ATL cordless telephone users. Unlike pooled facilities, which can be accessed via dial codes, Personal Lines can be accessed only via a dedicated feature button, and provide both incoming and outgoing service. Up to 16 terminals may share a Personal Line. Up to four parties may be off-hook on the line at the same time (the line itself is the fifth conferee).
Personal Lines Line Selection (Prime Line Preference): Personal Line. Prime Line Preference may be assigned to a Park: A parked Personal Line is bridgeable by any user with a button appearance of that line. Bridging on to the connection does not unpark the call; in this case, the parked call will not return to the parking user. Pickup: After a call is picked up from a Personal Line button, the called terminal can still enter the call.
FEATURES AND SERVICES Pickup Description This feature allows a user to answer a call ringing at another voice terminal. There are two forms of Pickup: (1) Directed and (2) Group. Directed Pickup: Directed Pickup allows calls to other voice terminals, including Automatic Intercom calls and calls ringing at coverage buttons. to be “picked up” by dialing the Pickup code ( ✶ 7 ) and the ringing terminal’s PDC.
Pickup If no eligible calls are ringing, attempting pickup results in reorder tone. Interactions The following features interact with Pickup. Bridging of System Access Buttons: Pickup is a station-oriented feature. Thus, calls ringing at a principal System Access (SA) button can be picked up by members of the principal’s Pickup Group; calls ringing at a Bridged Access (BA) button can be picked up by members of the bridging station’s Pickup Group.
Features and Services Pooled Facility - Dial Access Description This feature allows multiline and single-line voice terminal and ATL cordless telephone users to access a common pool of trunks by dialing a facility access code. Up to 16 facility access codes can be assigned (one per trunk group). The codes can be one to four digits in length. A group of similar trunks assigned the same access code is referred to as a trunk group. Additional information is provided in the “Trunk Groups” feature description.
Pooled Facility - Dial Access Administration Requirements Voice Terminal Port: ● Restrictions - Refer to “Calling Restrictions” feature description. Trunk Port: ● Assign facility access codes. ● Allow dial access for facility (yes or no).
Features and Services Pooled Facility - Direct Access Description This feature allows multiline voice terminal users to access a common pool of trunks via a Direct Facility access (FACILITY) button. Upon pressing a FACILITY button and going off-hook, a multiline voice terminal user is connected to a common pool of outside trunks (i.e., CO, FX, WATS, tie). If the Status and I-Use LEDs associated with the button light steadily, the user may complete the call.
Pooled Facility - Direct Access Administration Requirements Voice Terminal Port: ● Assign Direct Facility Access (FACILITY) buttons. ● Restrictions—Refer to “Calling Restrictions” feature description. Trunks: ● Assign Facility Access Codes. ● Allow dial access for facility (yes or no).
Features and Services Power Failure Transfer (PFT) Description This feature provides service to and from the CO for a limited number of prearranged single-line voice terminals during a commercial power failure (or when voltage drops below 90 volts for longer than 250 milliseconds) and during other service interruptions. Any loop start or ground start trunk may be arranged to terminate at a specific station on a one-to-one basis.
Power Failure Transfer (PFT) Only FCC registered single-line voice terminals may be used for PFT stations. Rotary sets must be used for dial pulse PFT trunks; touch-tone sets must be used for touch-tone PFT trunks. In the event of a Power Failure Transfer (switch has lost power or a major fault has occurred) a contact closure is provided to the Central Office (CO) over a dedicated pair of wires. The CO then makes busy all DID trunks.
FEATURES AND SERVICES Figure 2-38.
Power Failure Transfer (PFT) SYSTEM 25 CABINET ETU TRUNK PORT 25-PAIR CALL PROCESSOR -48V ETU TO CO 25-PAIR CENTRAL OFFICE TAE 25-PAIR CPU TO ADDITIONAL ETUs STATION PORT ETU TO SWITCH (TRUNK) ADDITIONAL ETU ETU TO SWITCH (LINE) ETU TO SIP OCTOPUS CABLE PART OF SIP 858A ADAPT.
FEATURES AND SERVICES NOTES: 1. TRUNK AND STATION CONNECTIONS TO ETU 2-4 ARE SIMILAR TO ETU (1). 2. THREE OF EIGHT STATION LINES (FROM ANALOG STATION CP) AND THREE OF EIGHT TRUNKS (FROM CO TRUNK CP) WHEN USED ARE “FED-THROUGH” ETU, THEY ARE NOT SWITCHED IN THE EVENT OF A POWER FAILURE. 3. MAXIMUM ETU(S) = 4, MAXIMUM PFT STATIONS PER ETU = 5. Figure 2-40.
Program Program Description This feature enables system users to store numbers for access by feature buttons or code dialing. Multiline voice terminal users can program numbers on REP DIAL and FLEX DSS buttons. Both multiline and single-line terminal users can store Personal Speed Dialing numbers. FLEX DSS buttons provide access to inside extension numbers only; REP DIAL buttons and Personal Speed Dialing are used for account codes and outside numbers (maximum of 28 digits and 25 digits, respectively).
FEATURES AND SERVICES USED IN PERSONAL SPEED DIALING NUMBERS CHAR. ✶ Produces a 1.5 second pause. — Since System 25 does not have a Dial Tone detector, judicious use of the pause character will help to ensure that intermediate Dial Tones are obtained before more digits are sent. — The pause character should not be programmed for internal calls. #✶ Transmits an actual “ ✶ ”. # # Transmits an actual “ # ”.
Program To Program a Number by Using the Code: 1. Lift the handset and listen for dial tone. 2. Dial #4 to enter the Program mode. 3. Dial the number you want to program. 4. Either: — Press the FLEX DSS or REP DIAL button, or — Dial the Personal Speed Dialing code (#20-#39) to indicate where this number should be stored. 5. Listen for confirmation tone and dial tone. 6. To program another number immediately, repeat steps 3 through 5. 7. Hang up.
FEATURES AND SERVICES Considerations The Program feature allows users to assign their own Personal Speed Dialing/Flex DSS/Repertory Dialing numbers. This is particularly useful where working arrangements or personnel responsibilities change. Users cannot place or answer calls while in the program mode. Incoming calls will receive Busy Tone.
Program Administration Requirements Voice Terminal Port: ● Assign FLEX DSS and REP DIAL buttons. ● Allow Personal Speed Dialing on a per-station basis.
FEATURES AND SERVICES Recall Description Users of single-line voice terminals that have RECALL buttons can obtain System 25 recall dial tone by pressing the button. Pressing RECALL is equivalent to briefly pressing and releasing the switchhook (switchhook flash), which is the required method of getting recall dial tone at a terminal not equipped with the RECALL button. Multiline voice terminals are administered for either manual or automatic activation of the Callback Queuing feature.
Remote Access Remote Access Description This feature allows a caller to dial into a System 25 from the public network using a predetermined 7- or 10-digit number and use some features and services. The caller may be required to dial a barrier (security) code after reaching the system to access the features and services. System administration can assign CO, FX, or INWATS trunks for Remote Access calls. These trunks can be dedicated to Remote Access or shared with other kinds of calling.
Features and Services If a Remote Access call reaches an inside station, the station can transfer the call back out of the system, subject to System 25 trunk-to-trunk restrictions and the transferring station’s calling restrictions. This is allowed even if the caller’s barrier code does not allow a direct call out. Considerations Using Remote Access, an employee of a company with a System 25 PBX can access system facilities from home or other remote locations.
Remote Access Interactions The following features interact with Remote Access. Account Code Entry: This feature cannot be used by Remote Access callers. Call Accountability: This feature cannot be used by Remote Access callers. Calling Restrictions: A barrier code class of restriction (COR) has the same parameters as the class of service permissions associated with stations. A system-wide default COR must be administered for use if barrier codes are disabled. Barrier code CORs override the default COR.
Features and Services Program Mode: This feature cannot be used by Remote Access callers. Remote Initialization and Maintenance Service (RIMS): RIMS requires a unique barrier code and carries special non-administrable restrictions. Speed Dialing, Personal: This feature cannot be used by Remote Access callers. Station Message Detail Recording (SMDR): Remote Access calls are included in the SMDR records.
Remote Access Administration Requirements System: ● Enable barrier codes (yes or no; default = yes). ● Assign DID remote access number (PDC or 0; default = 0). ● Assign system default COR for Remote Access: — ARS Facility Restriction Level (0 to 3; default = 3). — Toll Restriction Calls (1 to 4 or 0 for none; default = 0). — Outward Restricted? (yes or no; default = no). — “CO pool” dial restricted? (yes or no; default = no). — “Other pools” dial restricted? (yes or no; default = no).
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Remote Administration Interface Remote Administration Interface Description This feature provides dial-up access to the system’s administration port, either for a standard system administration terminal or for a PC running Advanced Administration software. Both read and write capability is provided with access to all system translation and fault tables. A remote administration terminal can perform the same functions as the on-premises SAT.
Features and Services Remote Initialization and Maintenance Service (RIMS) Description Remote Initialization and Maintenance Service (RIMS) provides an AT&T technician remote access to System 25. Using the RIMS feature, the technician can do System 25 initialization, ongoing administration, and maintenance. The remote administrator can initialize translations after the system is installed.
Remote Initialization and Maintenance Service (RIMS) 2. If you have a special telephone line connected to your System 25 for Remote Administration, do one of the following: ● Unplug the line when it is not being used. ● Install a switch in the line to turn it off when it is not being used. ● Install a security device, such as AT&T’s Remote Port Security Device. In addition, keep the Remote Administration telephone number secret.
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Repertory Dialing Repertory Dialing Description This feature allows multiline voice terminal users to store a telephone number, account code, or feature access code in the system’s memory and associate that number with a REP DIAL button. Pressing REP DIAL is equivalent to dialing the stored number. Individual numbers can be up to 28 digits in length. Programming the number is accomplished from the user’s voice terminal.
FEATURES AND SERVICES Display: When a call is placed by pressing a REP DIAL button, the characters stored are displayed. If ✶ was programmed to store a pause, P is displayed in the position of the ✶ . If ✶ was stored by programming # ✶ , only ✶ is displayed. If the button is not programmed, REP DIAL is displayed. Following/Forwarding: The associated activation and deactivation sequences (or portions of them) can be stored on REP DIAL buttons.
Send All Calls Send All Calls Description This feature allows multiline voice terminal including ATL cordless telephone users to turn off their ringers and invoke a “do not disturb” condition toward incoming calls. In addition, users who have coverage or bridged appearances will have those calls directed immediately to their covering and/or bridging stations, without the normal system ringing delay.
FEATURES AND SERVICES Interactions The following features interact with Send All Calls. Bridging of System Access Buttons: The principal station can be administered so that pressing the SEND ALL CALLS button will send ringing for incoming calls to its coverage stations only, to its bridging stations only, or to both. If ringing is sent to a Bridged Access (BA) button via Send All Calls, and if the BA button is administered to not receive ringing, the call will flash (but not ring) at the BA button.
Send All Calls Hands-Free Answer on Intercom: Activating Send All Calls will cause an active AUTO ANS button to turn off. As long as the Send All Calls feature is in use, AUTO ANS cannot be turned on. Line Status Indications: The line status lights still flash for incoming calls when Send All Calls is in effect even though normal ringing is cut off. The lights stop flashing when the calls are answered by a covering station or dropped by the caller.
FEATURES AND SERVICES Speaker Description Some 7300H-series voice terminals have a built-in loudspeaker that allows on-hook dialing, group listening, and monitoring of call progress signals. The terminal user turns on the speaker by pressing the SPEAKER button. Pressing the button at an idle terminal has the same effect as lifting the handset: the user is connected to the selected line and hears Dial Tone. An associated LED is lighted when the Speaker is on.
Speakerphone Adjunct Speakerphone Adjunct Description The speakerphone adjunct permits users of voice terminals not equipped with built-in speakerphones to place and receive calls without lifting their handsets. The adjunct has an On/Off switch, a switch to temporarily mute the microphone, status lamps, and a volume control (for incoming voice only). All voice terminal features operate normally with the speakerphone adjunct.
FEATURES AND SERVICES The unit has a SPEAKERPHONE ON/OFF pushbutton switch and a MICROPHONE ON/OFF pushbutton switch. The former controls the entire unit; the latter turns the microphone on and off for privacy. Each button has an associated green status LED. The S101A Speakerphone must be powered locally with a 2012D Transformer that plugs into a 115V ac receptacle. Adjunct power supplies are described in Section 4, “Hardware Description.
Speakerphone Adjunct ON LAMP VOLUME CONTROL SPEAKERPHONE TRANSMITTER 4A SPEAKERPHONE SYSTEM S101A/S102A SPEAKERPHONE Figure 2-41.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP PART OF SIP C2 SIP ADAPT. W1 B1 C1 VOICE TERMINAL T1 C8 S102A SPEAKERPHONE PEC 3163-HFU LEGEND: B1 C1 C2 C8 T1 W1 - TYPICAL-103A CONNECTING BLOCK* MODULAR CORD (D8W-87) - FURNISHED WITH SET OCTOPUS CABLE (WP90780) - PEC 2720-05P SPECIAL CORD - FURNISHED WITH ADJUNCT 7300H SERIES VOICE TERMINALS EXCEPT 34-BUTTON DELUXE 4-PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER Figure 2-42.
Speakerphone Adjunct SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP PART OF SIP C2 SIP ADAPT. W1 B1 Z400F ADAPT. C1 VOICE TERMINAL T1 C7 PWR.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE TN735 MET LINE CP PART OF SIP C2 SIP ADAPT W1 B1 400B2 ADAPT C1 C7 248B ADAPT 2012D TRANS LEGEND: B1 C1 C2 C8 T1 W1 248B ADAPTER 400B2 ADAPTER 2012D TRANSFORMER C7 - TYPICAL-103A CONNECTING BLOCK* MODULAR CORD (D8W-87) - FURNISHED WITH SET OCTOPUS CABLE (WP90780) PEC 2720-05P SPECIAL CORD - FURNISHED WITH ADJUNCT 7203M SET - 12-BUTTON MET SET 4 PAIR INSIDE WIRING CABLE* MODULARIZES 2012D TRANSFORMER POWER ADAPTER PEC 21691 15-18V AC
Speed Dialing Speed Dialing Description There are two types of Speed Dialing: (1) System Speed Dialing, and (2) Personal Speed Dialing. System Speed Dialing: Allows the System Administrator to store up to 90 numbers (maximum of 28 characters in length) that are accessible by dialing 3-digit codes from any voice or data terminal. Examples of typical System Speed Dialing numbers include frequently-dialed DDD numbers (together with leading facility access codes for WATS, FX etc.) and account codes.
FEATURES AND SERVICES Personal Speed Dialing: Allows users to program up to twenty Personal Speed Dialing numbers (maximum of 25 characters in length) that are accessible only from their terminals. The numbers are accessed by dialing associated access codes (#20-#39). Personal Speed Dialing is authorized on a per-station basis through System Administration. The System Administrator will inform users if they can use this feature.
Speed Dialing Data Terminal Dialing: System Speed Dialing codes can be entered during Data Terminal Dialing. Personal Speed Dialing is not supported. Display: When a call is placed by dialing a Personal Speed Dialing code, the characters stored are displayed. If ✶ was programmed to store a pause, P is displayed in the position of the ✶ . If ✶ was stored by programming # ✶ , only ✶ is displayed. When a call is placed using a System Speed Dialing code, only the dialed code (#100-#189) is displayed.
FEATURES AND SERVICES STARLAN NETWORK Access Description The AT&T STARLAN NETWORK (STARLAN NETWORK) Access feature provides connectivity between System 25 and a colocated STARLAN NETWORK. This connectivity is provided by a combination of hardware and software elements. The STARLAN NETWORK must use Release 2 software; System 25 is not compatible with Release 3 STARLAN NETWORK software. The STARLAN INTERFACE circuit pack (ZTN84) is the principal hardware element connecting System 25 and the STARLAN NETWORK.
STARLAN NETWORK Access ACCESS must be used in conjunction with the AT&T STARLAN NETWORK Server software (Version 2.0 or later). Installation software furnished with ACCESS requires the STARLAN NETWORK client installation diskette in order to install ACCESS. ● Communications Access Manager (CAM) CAM is an MS-DOS applications program that provides an enhanced calling interface and terminal emulation for PCs connected to System 25 or a STARLAN NETWORK.
FEATURES AND SERVICES 3. After a connection message is received, CAM automatically switches to terminal emulation (data) mode. 4. The user may now log into and converse with the remote host 5. To disconnect, the user selects the CAM disconnect command Figure 2-45. STARLAN NETWORK and System 25 Configuration The System 25 View of a STARLAN NETWORK From System 25, the STARLAN CP looks and functions like a TN726 DLC (with only four ports).
STARLAN NETWORK Access Calls from System 25 to the STARLAN NETWORK A. An MS-DOS PC connected to System 25 uses the STARLAN NETWORK ACCESS software to run STARLAN NETWORK applications. The PC may be connected either to a System 25 DLC port or to an analog station or trunk port. (The latter arrangement uses System 25’s Modem Pooling feature.) A typical call is as follows: 1. The PC user loads ACCESS and is automatically connected to the STARLAN NETWORK.
FEATURES AND SERVICES Third-Party Call Setup A data terminal (on System 25) or workstation (on the STARLAN NETWORK) can set up a call between two other stations (voice or data) using the Third-Party Call Setup feature. Since voice port/data port associations are not meaningful for STARLAN CP ports, STARLAN NETWORK workstations must always specify the Personal Dial Code of the source voice terminal or the Data Dial Code of the source data terminal.
STARLAN NETWORK Access Common Administration (default): ● CO trunk pool dial restriction (no) ● Other trunk pool dial restriction (no) ● Outward restriction ● Toll Restriction Class (none) ● ARS FRL (3) ● Restrict Third-Party Call Setup feature (yes) Hardware Requirements Requires a STARLAN INTERFACE CP. Each CP provides four interface ports between the System 25 and the STARLAN NETWORK.
FEATURES AND SERVICES NAU NEU ZTN84 ZTN78 TN742 A1 A2 B1 C1 C2 C5 W1 - NETWORK ACCESS UNIT - PEC 2614-100 NETWORK EXTENSION UNIT - PEC 261O-OO1 STARLAN CP - PEC 62518 TIP/RING LINE CP - PEC 62504 ANALOG LINE CP - PEC 63511 WP90851-L1 (Y ADAPTER) - PEC 2750-T05 (NOTE 1) 858A ADAPTER 103A CONNECTING BLOCK* MODULAR CORD D8W-87 (FURNISHED WITH NAU) OCTOPUS CABLE WP90780 - PEC 2720-05P (NOTE 1) MODULAR CORD D4BU-87 (FURNISHED WITH PHONE) FOUR PAIR BUILDING WIRING* NOTE 1: C2 AND A1 ARE NOT REQUIRED IF NO PHO
STARLAN NETWORK Access NAU NEU ZTN79 ZTN84 A1 A2 A3 B1 C1 C2 C3 C4 T1 W1 - NETWORK ACCESS UNIT - PEC 2614-100 NETWORK EXTENSION UNIT - PEC 2610-001 ATL LINE CP - PEC 62505 STARLAN CP - PEC 62518 “Y” ADAPTER WP90851-L1 - PEC 2750-T05 (NOTE 1) 858A ADAPTER ATL ADAPTER (NOTE 1) CONNECTING BLOCK 103A* MODULAR CORD D8W-87 (FURNISHED WITH NAU AND PHONE) OCTOPUS CABLE WP90780 - PEC 2720-05P 6 INCH MODULAR CORD (PART OF A3) 7 FOOT MODULAR CORD (PART OF A3) 48 VOLT DC POWER SUPPLY KS22911 (NOTE 1) FOUR PAIR BUILD
FEATURES AND SERVICES Station Hunting Description This feature provides linear, circular, or combinational hunting sequences for calls to busy single-line voice terminals and data terminals. Calls to a busy terminal may hunt to (only) one other terminal; however, up to five terminals may hunt to the same terminal. Although hunting is not available to or from multiline terminals, single-line terminals may have their calls covered by multiline terminals. Station Hunting takes precedence over Coverage.
Station Hunting Considerations Station Hunting provides several flexible alternatives to ensure that calls do not go unanswered. Note that only calls to busy terminals will hunt; once a call begins ringing at a terminal it will remain there unless picked up or covered. Interactions The following features interact with Station Hunting. Attendant Camp-On: When the attendant extends a call to a busy terminal in a hunt group, the call hunts for an idle terminal.
FEATURES AND SERVICES Station Message Detail Recording (SMDR) Description This feature provides detailed call information records on all incoming and outgoing trunk calls and sends this information to an (optional) output device. Data on inside calls is not collected. The call records can be used to compute costs, allocate charges, and analyze calling patterns.
Station Message Detail Recording (SMDR) The SMDR call detail (Figure 2-48) contains the following information for each call record: ● TYPE (Column 1) All voice calls are labeled C, data calls are labeled D. (“TYPE” is not printed as a column heading) ● Blank (Column 2) ● DATE (Columns 3-10) The date the call is originated. ● Blank (Column 11) ● TIME (Columns 12-16) The time the trunk is seized is listed using a 24-hour clock. For example, 2:01 PM is listed as 14:01. Seconds are truncated.
Features and Services ● Blank (Column 46) ● FAC (Columns 47-51 - Facility) Indicates the facility used to place the call. For outgoing calls including Speed Dialing numbers, the pooled facility selected by ARS or the facility access code that was dialed (or that corresponds to the facility button that was pressed) is identified. For Remote Access calls through the System 25 to outside numbers, this field contains the number of the outgoing trunk or trunk pool.
Station Message Detail Recording (SMDR) ● Blank (Column 74) ● PDC (Columns 75-78) Identifies the user responsible for outgoing calls. The user is identified by the call accountability login (##PDC) entered at the originating voice terminal. If no call accountability is entered, the PDC field is blank. Figure 2-49 and Figure 2-50 summarize the Call Record and Call Record Header formats. Considerations SMDR provides detailed call information on incoming and outgoing calls.
Features and Services Remote Access: Remote Access calls are fully covered in the SMDR call records. Failed remote calls are shown in account field (see Figure 48). Tandem Trunking: If an outgoing call is originated by a tandem tie trunk, the tandem trunk’s FAC is recorded in the STN field. If no FAC exists for this trunk, then the 4-digit trunk number (9xxx) will appear. No other SMDR fields are affected. Administration Requirements System: ● Send SMDR records to SMDR Port (yes or no; default = yes).
Station Message Detail Recording (SMDR) DATE 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 C C C C C C C C C C C C C C C C C C C C C C C C TIME 11:14 11:14 11:15 11:17 11:19 11:20 11:34 11:44 11:50 12:14 12:24 13:27 13:14 13:23 13:28 13:33 13:45 14:14 14:24 14:34 14:43 15:14 15:16 15:19 CALLED NUMBER 1-232-566-1321 IN 1-322-564-1376 1-2
Features and Services DESCRIPTION ASCII CHARACTER POSITION (Column Number) 01 Call Type 02 Space 03-04 VALID CHARACTERS C or D Date:Month 0-9 Date:Day 0-9 Date:Year 0-9 05 06-07 08 09-10 11 12-13 14 15-16 17 Space Time:Hour 0-9 : : Time:Minute 0-9 Space 18-35 Dialed Number 0-9, Space, -, IN 36 Error Character ?, or Space 37 Space 38-39 40 41-42 43 44-45 46 47-51 52 Duration:Hour : 0-9 : Duration:Minute 0-9 Duration:Second Facility Space, 0-9, # Space Station 57-58 Space
Station Message Detail Recording (SMDR) ASCII CHARACTER POSITION 00 01-03 04-07 08-12 13-16 17-23 24-29 30 31-36 37-38 39-41 42-48 49-51 52-54 55-57 58-62 63-69 70-76 77-79 80 81 Figure 2-50.
FEATURES AND SERVICES SYSTEM 25 CABINET PART OF OCTOPUS CABLE C2 ZTN130 CPU/MEM > PART OF SIP Z210A ADAPT. C1 355A/AF ADAPT. SMDR OUTPUT DEVICE LEGEND: C1 C2 355A ADAPTER 355AF ADAPTER Figure 2-51.
Station Message Detail Recording (SMDR) SYSTEM 25 CABINET PART OF OCTOPUS CABLE PART OF SIP C2 ZTN130 CPU/MEM Z21OA ADAPT. C1 C3 355AF ADAPT. Z3A4 ADU C1 C4 PART OF SIP SMDR OUTPUT DEVICE C1 Z3A1 ADU* B1 W1 858A 400B2 ADAPT. C7 2012D TRANS. 248B ADAPT.
Features and Services LEGEND: B1 C1 C2 W1 Z3A1 ADU C3 355AF ADAPTER Z3A4 ADU C1 C7 248B ADAPTER 400B2 ADAPTER 2012D TRANSFORMER – – – – – – – – – – – – – TYPICAL-103A CONNECTION BLOCK† MODULAR CORD (D8W-87) - PEC 2725-07G OCTOPUS CABLE (WP90780) - PEC 2720-05P 4-PAIR INSIDE WIRING CABLE† EQUIPPED WITH 3-FOOT PLUG-ENDED EIA CORD - PEC2169-001 EIA CROSSOVER CABLE (M7U-87) RS-232 RECEPTACLE TO MODULAR JACK EQUIPPED WITH 3-FOOT RECEPTACLE-ENDED EIA CORD MODULAR CORDS (2) (D8W-87) PEC 62515 MODULAR POWER CORD
Station Message Detail Recording (SMDR) This figure no longer applicable. Figure 54.
Features and Services LEGEND: C2 OPS C3 355AF ADAPTER Z3A4 ADU C1 C7 248B ADAPTER 400B2 ADAPTER 2012D TRANSFORMER – – – – – – – – – – OCTOPUS CABLE (WP90780) - PEC 2720-05P OFF-PREMISES STATION EIA CROSSOVER CABLE (M7U-87) RS-232 RECEPTACLE TO MODULAR JACK EQUIPPED WITH 3-FOOT RECEPTACLE-ENDED EIA CORD MODULAR CORDS (2) (D8W-87) MODULAR POWER CORD (D6AP-87) MODULARIZES 2012D TRANSFORMER POWER ADAPTER 15-18V AC SOURCE PEC 62515 Figure 2-55.
Station-to-Station Message Waiting Station-to-Station Message Waiting Description This feature allows pairs of multiline voice terminal users to signal each other with Message Waiting (MSG WAIT) buttons and associated green status LEDs at each terminal. When either user presses the MSG WAIT button, the LEDs light at both stations. This arrangement enables one user to inform the other user that a message is waiting; it can also be adapted to other two-way signaling purposes such as “come to my office.
FEATURES AND SERVICES System Administration Description The software that controls System 25 operation consists of tables located in system memory. These tables contain data associated with: ● Trunk, Station, and Auxiliary Equipment Ports ● System Parameters ● Direct Group Calling Groups ● Toll Calls Allowed Lists ● Peripheral Equipment Data Communications Parameters ● Automatic Route Selection. Collectively, these software tables are referred to as translations.
System Administration A main menu gives the user ready access for these tasks: — Adding/changing/removing voice station assignments — Adding/removing users to and from coverage groups — Saving translations. A significant advantage of the AAS package is that it can be used either at the same location or can be used remotely via a dial-up connection. Considerations The default system administration password (systemx5) can be changed through an administration item.
FEATURES AND SERVICES The Model 703 keyboard generates ASCII codes. The terminal produces two audible tones to indicate the completion of activities. ● Short Tone—A tone of less than one half-second indicates the normal termination of an operation ● L o n g T o n e — A one-second tone indicates that an error or an abnormal operating condition has been detected. The Model 703 SAT Supplement contains a complete set of operating instructions for the Model 703 Data Terminal.
System Administration A-Z or a-z 0-9 ✶ , # . ? BACKSPACE RETURN " The data transfer rate is set when a carriage return character is received by the administration port. There are two supported transfer rates: 1200 bps and 300 bps. Refer to the R3 Administration Manual for administration procedures and additional information.
FEATURES AND SERVICES Figure 2-56.
System Administration SYSTEM 25 CABINET PART OF OCTOPUS CABLE PART OF SIP ZTN130/ ZTN142 CPU/MEM C2 Z210A ADAPT. C1 355A/AF SYSTEM ADMINISTRATION TERMINAL LEGEND: C1 C2 355A ADAPTER 355AF ADAPTER – MODULAR CORD (D8W-87) - PEC 2725-07G – OCTOPUS CABLE (WP90780) - PEC 2720-05P – RS-232 PLUG TO MODULAR JACK - PEC 2750-A24 – RS-232 RECEPTACLE TO MODULAR JACK - PEC 2750-A25 Figure 2-57.
Features and Services LEGEND: B1 C1 C2 W1 Z3A1 ADU C3 C4 355AF ADAPTER Z3A4 ADU C1 C7 248B ADAPTER 400B2 ADAPTER 2012D TRANSFORMER – – – – – – – – – – – – – – TYPICAL-103A CONNECTION BLOCK† MODULAR CORD (D8W-87) - PEC 2725-07G 0CTOPUS CABLE (WP90780) - PEC 2720-05P 4-PAIR INSIDE WIRING CABLE† EQUIPPED WITH 3-FOOT PLUG-ENDED EIA CORD - PEC 2169-001 EIA CROSSOVER CABLE (M7U-87) ADU CROSSOVER CABLE (D8AM-87) RS-232 RECEPTACLE TO MODULAR JACK EQUIPPED WITH 3-FOOT RECEPTACLE-ENDED EIA CORD PEC 62515 MODULAR C
System Administration LEGEND: B1 C1 C2 W1 Z3A1 ADU C3 355AF ADAPTER Z3A4 ADU C1 C7 248B ADAPTER 400B2 ADAPTER 2012D TRANSFORMER – – – – – – – – – – – – – TYPICAL-103A CONNECTION BLOCK† MODULAR CORD (D8W-87) - PEC 2725-07G OCTOPUS CABLE (WP90780) - PEC 2720-05P 4-PAIR INSIDE WIRING CABLE† EQUIPPED WITH 3-FOOT PLUG-ENDED EIA CORD - PEC 2169-001 EIA CROSSOVER CABLE (M7U-87) RS-232 RECEPTACLE TO MODULAR JACK EQUIPPED WITH 3-FOOT RECEPTACLE-ENDED EIA CORD MODULAR CORDS (2) (D8W-87) PEC 62515 MODULAR POWER COR
Features and Services LEGEND: C1 C2 C3 355AF ADAPTER – – – – MODULAR CORD (D8W-87) - PEC 2725-07G OCTOPUS CABLE (WP90780) - PEC 2720-05P EIA CROSSOVER CABLE (M7U-87) - PEC 2724-30C RS-232 RECEPTACLE TO MODULAR JACK - PEC 2750-A25 Figure 2-60.
System Administration LEGEND: C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P OPS - OFF-PREMISES STATION C3 - EIA CROSSOVER CABLE (M7U-87) 355AF ADAPTER - RS-232 RECEPTACLE TO MODULAR JACK Z3A4 ADU - EQUIPPED WITH 3-FOOT RECEPTACLE-ENDED EIA CORD C1 - MODULAR CORDS (2) (D8W-87) C7 - MODULAR POWER CORD (D6AP-87) 248B ADAPTER - MODULARIZES 2012D TRANSFORMER 400B2 ADAPTER - POWER ADAPTER 2012D TRANSFORMER - 15-18V AC SOURCE Figure 2-61.
FEATURES AND SERVICES System Maintenance Description The primary objective of System 25 maintenance is to detect, report, and clear troubles as quickly as possible and with minimum disruption to normal service. This goal is supported by periodic automatic diagnostic tests and fault detection hardware. System design allows most troubles to be resolved to the circuit pack level. System 25 hardware and software are organized as independent units or maintenance objects.
System Maintenance If an error that begins as a Transient System Error is verified or reaches a threshold level of severity, it is reclassified as a Permanent System Alarm. Transient system errors are stored in the Transient System Error log. The system can store a combined total of 40 Permanent System Alarms and Transient System Errors in the error tables. ● Most Recent System Errors: The ten Most Recent System Errors are recorded by the system, regardless of their level of severity.
FEATURES AND SERVICES Tandem Trunking Description Tandem trunking provides an enhanced networking capability for System 25. With this feature, tie trunks can be used to call through System 25 to reach another switching system (CO or PBX). Calls may be completed over on-network or off-network facilities. To be treated as tandem trunks, tie trunks must be assigned trunk numbers beginning with the digit 9. Incoming calls on these trunks may route out of System 25 over ground start, loop start, or tie trunks.
Tandem Trunking To gain access to an ARS routing facility, the tandem trunk’s “station” FRL must be equal to or greater than the route’s FRL. Thus, a tandem trunk with a FRL of 0 has the least ARS privileges, while a FRL of 3 provides the most privileges. If the restriction level of the tandem trunk is less than all route FRLs, reorder tone is returned to the calling party. Dial Access: No toll restriction is provided for tandem trunk calls.
FEATURES AND SERVICES Test Description This feature provides users of the 7300H series voice terminals the ability to test their terminals. Placing the Test/Program (T/P) switch in the “T” position causes all red and green LEDs to light alternately and the tone ringer to sound. If the terminal has a display module, the following responses also occur: ● The display shows 16 darkened squares. ● After the Test switch is returned to its normal position, the Local Display alarm clock produces 3 short beeps.
Third-Party Call Setup Third-Party Call Setup Description The Third-Party Call Setup feature allows a data terminal (the third party) to set up, via Command Mode, a call between an on-premises voice or data terminal (the source) and another voice or data terminal (the destination; can be on- or off-premises). Once the call has been set up, the third-party drops off and is not included in the call. Each third-party data terminal may be administered to have a particular source terminal “associated” with it.
FEATURES AND SERVICES example, if the source terminal is restricted to on-premises calls only, a call to an offpremises destination terminal will be blocked. Setting Up A Third-Party Call To set up a call from the third-party data terminal, the user selects from the entry-level Command Mode menu (see Figure 2-58). The user then enters the characters as required to call the destination terminal. Calls may be completed as follows.
Third-Party Call Setup Considerations With this feature, computer-based telemarketing or other calling applications can set up calls for the user. Interactions The following features interact with Third-Party Call Setup. Account Code Entry, Forced (FACE): If the source station is FACE-restricted, the third-party data terminal must prefix the outside destination number with ✶ 0 and an account code. Coverage: Third-Party Call Setup calls to the source terminal will not be directed to a coverage station.
FEATURES AND SERVICES — ● No source terminals (feature disabled; default) AT&T STARLAN NETWORK Access: Ports administered on the STARLAN INTERFACE circuit pack may not have a particular source terminal associated with them. Depending on the administration parameters enabled, third-party data terminals on the STARLAN INTERFACE circuit pack may establish calls for: 2-336 — Any voice or data source terminal — No source terminals (feature disabled; default).
Tie Trunks Tie Trunks Description Tie trunks provide private communications links between System 25 and other PBXS Incoming tie trunk calls may be directed to the attendant, to a voice terminal, or to a data endpoint. Service may be either automatic, immediate dial, delay dial, or wink start. Dial pulse or touch-tone signaling is supported on both incoming and outgoing calls (and may be different for incoming and outgoing calls).
FEATURES AND SERVICES Administration Requirements Trunk Port: ● Assign Trunk Type And Number. ● Assign Class Of Service Code (0-15). ● Assign Facility Access Code; default = 102. ● Allow Dial Access (yes or no; default = yes). ● For Auto-in Type Only—Assign To DGC Group (Group Number 1-32, or 0 for none; default = 0). ● Make This a Directed Night Service Trunk (yes or no; default = yes). ● Assign Night Service Delay Announcement (1, 2, or 0 for none; default = 0).
Tie Trunks Hardware Requirements Requires port interfaces on a TN760B Tie Trunk CP or TN767 DS1 Interface CP.
FEATURES AND SERVICES Touch-Tone and Dial Pulse Services Description All touch-tone single-line voice terminals and MET sets are equipped with dial pads that generate Dual Tone Multifrequency (DTMF) signals when a dial button is pressed. Model 500 Series single-line terminals have rotary dials that generate dial pulses corresponding to the numbers selected. The 7300H series (MERLIN) voice terminals are equipped with touch dial pads that generate digitally coded signals when a dial button is pressed.
Transfer Transfer Description This feature allows a user to move any call from the user’s terminal to another voice terminal, then disconnect from the call. A user can transfer calls either with or without announcement. A multiline terminal user presses TRANSFER; the party is automatically placed on Special Hold (indicated by a broken-flutter on the status LED of the call appearance button). The system will automatically select an idle System Access button.
FEATURES AND SERVICES Bridging of System Access Buttons: A call can be transferred from a bridged call appearance using the usual transfer operations. When a call is held for transfer by pressing the TRANSFER button, an idle System Access button or an idle System Access-Originate Only button, if available, is automatically selected by the system for placing the new call.
Transfer Music-On-Hold: An administration item allows Music-On-Hold to be enabled or disabled for “Special Hold.” Park: Single line voice terminals cannot transfer parked calls. Pickup: A transferred call maybe answered via the Pickup feature. Public Station: If a non-restricted user (typically the attendant) transfers dial tone to a PUBLIC station, the restriction level (level 5) of the PUBLIC phone will apply, unless higher restriction level stations remain on the call with the PUBLIC station.
Features and Services Transfer To Data Description This feature allows multiline voice terminal users to originate or answer a call from their voice terminals and then establish a data connection by transferring the call to a data terminal. Note: Single-line voice terminals cannot be used to establish a data connection by transferring a call to a data endpoint. (Refer also to the overview of the system’s data features provided in the “Data Services Overview” description.
Transfer To Data Data Call Preindication A multiline voice terminal user, by going off-hook and pressing an idle DATA button, may indicate that a data call will be attempted. This reserves the associated data port and a modem pool conversion resource. This procedure is recommended when the data call is a trunk call. The data port reservation is acknowledged by a winking status LED at the DATA button. Subsequently, invoking Transfer To Data transfers the call to the associated data terminal.
FEATURES AND SERVICES Trunk Groups Description This feature allows each trunk in the system to be assigned to one of up to 16 trunk groups. Trunks link two switching systems, such as System 25 and the local CO or System 25 and another PBX. Although not required, trunks can be grouped together in trunk groups (sometimes referred to as pooled facilities) when all the trunks in the group perform the same function.
Trunk Groups ● Wink Start—A momentary signal (wink) is sent to the distant switch (Tie and DID trunks). ● Delay Dial—A steady signal is sent to the distant switch and is removed when ready to receive digits (Tie trunks only). ● Automatic— No start dial signals are used. sufficient to route the call (Tie trunks only). The seizure signal sent or received is Trunk groups connecting with a local CO, WATS office, or FX office can be ground or loop start. DID trunk groups can be immediate or wink start.
FEATURES AND SERVICES Facility Access Restriction (see “Calling Restrictions”): Stations may be restricted from dialing the CO trunk pool and/or all (fifteen) other trunk groups (as a whole). Stations so restricted may still dial out if they are transferred to a trunk by another station not so restricted. Tie Trunks: Refer to the “Tie Trunks” feature description. Toll Restriction (see “Calling Restrictions”): When toll restricted stations access FX, WATS, or Tie trunks, they are not toll restricted (i.e.
Trunk-To-Trunk Transfer Trunk-To-Trunk Transfer Description This feature allows users to connect incoming trunk calls to other outside trunks and then hang up (under certain conditions). Incoming trunk calls may be transferred to another trunk, or conferenced with another trunk. In all cases and at all times, either a System 25 station must remain in the conference or one of the calls must be an incoming call on a ground start, loop start (administered for trunk-totrunk transfer), DID, or tie trunk.
FEATURES AND SERVICES User Changeable Options Description User Changeable Options allows a data terminal user who is in the Command Mode to view and change the settings of certain data port options. This feature is available to users of Data Line CP ports; users of STARLAN Interface CP ports cannot change their port options. Table 2-L contains brief descriptions of the user changeable options. Table 2-L.
User Changeable Options 2-351
FEATURES AND SERVICES Viewing Options When is selected, current and default values for the various data port options are displayed, as shown below: OPTIONS CURRENT DEFAULT Speed (highest) Parity Mismatch Local Echo Answer Text Connect Indicat.
User Changeable Options Once a user has selected an option to be changed, a menu of valid settings for this option is displayed (, , etc.). An “X” is displayed beneath the current setting of the options, or beneath an option that may have been changed but not yet enabled.
FEATURES AND SERVICES ● If the user selects , the following menu is displayed: OPTIONS CURRENT REQUESTED Speed (highest) Parity Mismatch Local Echo Answer Text Connect Indicat. Recall Sequence 9600 Even Yes Yes Yes Yes Br-Br 4800 (Auto) Even Yes Yes Yes Yes Br-Br The value in the CURRENT column indicates the current (active) status of the option. The value in the REQUESTED column indicates the most recently entered value (not yet enabled).
User Changeable Options Administration Requirements ● Data Port: A data port must be administered to allow the terminal user to change options from the Command Mode menu. If permission is denied, the user may view the current option settings but not change them. ● AT&T STARLAN NETWORK Access: The User Changeable Options feature is not available for ports administered as STARLAN INTERFACE ports. Refer to the “STARLAN NETWORK Access” feature description for additional information.
FEATURES AND SERVICES Virtual Facilities Description A virtual facility (VF) is a call routing facility that is not defined by the physical facility (trunk) over which calls are routed, but is instead defined by a combination of access codes, authorization codes, and coded characters that allow special handling of the destination telephone numbers. VFS can be used to automatically route calls via other carrier networks, private networks, or tie trunks.
Virtual Facilities If the VF is used in the first position of a routing pattern, calls may queue on it if all of the routes are busy. Whenever a VF is used to complete a call (either by dial access or through ARS), call processing treats the number as a physical facility for Station Message Detail Recording (SMDR) purposes. Thus, if VF code #190 is used to complete a call, the SMDR call record will show “#190” as the facility used. A VFN may contain up to 28 characters.
FEATURES AND SERVICES — The “9” is used to access the remote PBX’s ARS. — The “ ✶ ” represents a pause of 1.5 seconds (allows time for dial tone to occur). — The “555 4343” defines the local address of a private network and its internal routing table. — The “ ✶ ” represents a 1.5 second pause. ● — The “#5” indicates that the destination number should be inserted here, rather than at the end of the VF translation.
Virtual Facilities Accessing a Virtual Facility Dial access is provided by dialing the VF code (#190-#199, including the “#”), followed by the destination telephone number. ● Example: — The user dials the following VF code and associated destination telephone number. #192 12125551643. — The stored VFN 2222 ✶ 333 ✶ 444. associated with VF code #192 is defined as — The first four digits (2222) represent the FAC for a tie trunk group to a remote PBX. — The ✶ represents a 1.5 second pause.
FEATURES AND SERVICES Interactions When using a VF through dial access, calling restrictions will be based on the station’s class of service. Dial access VF calls will be completed only if: ● The VF code is valid and not dial restricted. ● The station is not outward restricted. ● The station has dial access permission for the physical facility embedded within the VFN. ● The destination telephone number is valid and allowed for the station’s toll restriction class.
AUDIX Voice Power System AUDIX Voice Power System Description The AT&T AUDIX VOICE POWER (AVP) System provides a group of communications services that expand System 25 operation in the area of collecting, processing, and delivering voice messages for inside users and outside callers. It functions somewhat like a sophisticated systemwide answering machine and/or an automated attendant. AVP is an adjunct to System 25, connected by way of special ports on analog tip/ring circuit packs.
Features and Services Choosing Passwords Passwords should be as many digits as possible, and should not be obvious. Avoid those with ascending digits (e.g., 1234), the same digits (e.g., 0000), digits corresponding to the employee’s name (e.g., 5646 for John), the current year (e.g., 1993), the same number as extension (e.g., extension 3455, password 3455), reverse extension (e.g., extension 3455, password 5543), numbers that identify the user (e.g., social security, employee ID, room number, etc.
FUNCTIONAL DESCRIPTION Digital Switch 3-1 Common Control 3-2 CPU/MEM CP 3-2 Switching Network 3-6 TDM Bus 3-6 Port Circuits 3-9 Circuitry Common to All Port CPs 3-9 Analog Line (TN742) 3-14 ATL Line (ZTN79) 3-16 Auxiliary Trunk (TN763) 3-18 Data Line (TN726) 3-19 DID Trunk (TN753) 3-21 Ground Start Trunk (ZTN76) 3-22 Loop Start Trunk (ZTN77) 3-24 MET Line (TN735) 3-25 STARLAN Interface (ZTN84) 3-26 Tie Trunk (TN760B) 3-27 Tip Ring Line (ZTN78) 3-30 System Resources 3-31
Memory 3-41 Call Processing 3-41 TDM BUS 3-42 Port Circuit Packs 3-42 Step-By-Step Call Description -ii- 3-42
Figures Figure 3-1. System 25 Digital Switch 3-1 Figure 3-2. CPU/MEM (ZTN142) Circuitry 3-3 Figure 3-3. TDM Bus Time Slot Generation (Not a Timing Diagram) 3-6 Figure 3-4. TDM Bus—Three Cabinet System Figure 3-5. Equipment Connections Via Circuit Pack Figure 3-6. Port Circuit Pack Common Circuitry Figure 3-7. Analog Line (TN742) Unique Circuitry 3-15 Figure 3-8. ATL Line (ZTN79) Unique Circuitry 3-17 Figure 3-9. Auxiliary Trunk (TN763) Unique Circuitry 3-19 Figure 3-10.
FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION This section describes how the digital switch and the software of System 25 provide control and switching. Digital Switch Figure 3-1 shows a block diagram of the System 25 digital switch.
FUNCTIONAL DESCRIPTION Common Control The Common Control circuitry consists of a single ZTN142 CPU/MEM (Call Processing Unit/Memory) circuit pack (CP). CPU/MEM CP The CPU/MEM runs the system feature code for the system and provides for the storage of software associated with system operation. This CP is powered from the backplane by +5 and –5 volts. It also draws -48 volts from the backplane to drive the Emergency Transfer Unit.
FUNCTIONAL DESCRIPTION Figure 3-2.
FUNCTIONAL DESCRIPTION All uplink messages from the port circuits are checked for consistency and passed to the Common Control. The controller is the distribution control point for all downlink control messages. It continuously scans, over the TDM bus, the port circuit microprocessors for sanity and activity. External RAM associated with this microprocessor stores control channel information and port related information. The controller consists of bus buffers and a Sanity and Control Interface (SAKI).
FUNCTIONAL DESCRIPTION ● Emergency Transfer Unit (ETU) Control Removes -48 V dc power from the ETUs of the system when the system loses power or a major system malfunction occurs. ● Bus Terminators These resistors are required for proper operation of the TDM bus. The CPU/MEM CP provides the proper termination for one end of the bus, and a plug-in TDM bus termination circuit card (plugs into cabinet backplane) is used to terminate the other end.
FUNCTIONAL DESCRIPTION Switching Network System 25 uses distributed processing techniques to provide switched voice and data services. The switch operates at 64 Kbps. The switching network consists of the Time Division Multiplex (TDM) bus, the Port Circuits and the System Resource Circuits. The TDM bus connects the intelligent ports to the Common Control circuit pack and other ports through the network control circuit.
FUNCTIONAL DESCRIPTION ● Physical Characteristics The TDM bus is an 8-bit bus that snakes continuously between cabinets in a multicabinet system as shown in Figure 3-4. The total length is about 9 feet for a three cabinet system. The bus is driven from any of the circuit packs in the cabinets. Similarly, a signal on the bus can be received by any circuit pack. Within a cabinet, the bus is printed on one side of the circuit pack carrier backplane while the other side is solid ground.
FUNCTIONAL DESCRIPTION TDM BUS TERMINATOR CARD CABINET 3 ON/OFF SWITCH AC POWER # 6 AWG BUILDING GROUND WIRE TDM BUS EXTENDER CABLE CABINET 2 AC POWER #6 AWG GROUND WIRE CABINET 1 COUPLED BONDING CONDUCTOR (CBC) AC POWER TO SINGLE POINT GROUND Figure 3-4.
FUNCTIONAL DESCRIPTION Port Circuits The port circuit packs listed below provide the link between trunks and external equipment and the TDM bus. Figure 3-5 shows the equipment types that can be connected to the digital switch by the call processing and port circuit packs.
FUNCTIONAL DESCRIPTION PART OF DIGITAL SWITCH DATA TERMINAL EQUIPMENT, HOST C0MPUTER TN726 DATA LINE CP RS-232C Z3A1/2/4 ADU SINGLE-LINE VOICE TERMINAL (2500-SERIES 7101A OR 7102A) DATA TERMINAL EQUIPMENT, HOST COMPUTER RS-232C TN724 ANALOG LINE CP OR ZTN78 TIP RING LINE CP TN726 DATA LINE CP Z3A5 ADU MULTILINE VOICE TERMINAL (7300H-TYPE) ZTN79 ATL LINE CP ATL CORDED AND CORDLESS TELEPHONES ZTN76 GROUND START TRUNK CP OR ZTN77 LOOP START TRUNK CP _CO, _FX,_WATS_ _ _ PAGING EQUIPMENT DID TRUNKS
FUNCTIONAL DESCRIPTION PART OF DIGITAL SWITCH SAT, DTU, SMDR, CAS (ON-PREMISES) (DIRECT CONNECTION) Z3A1 ADU * Z3A4 ADU * * REQUIRED FOR CONNECTIONS >50 FEET OR NOT SHARING SAME AC OUTLET SAT, SMDR, CAS (ON-PREMISES SWITCHED CONNECTION) Z3A1/4 ADU ZTN142 CPU/MEM CP (1) SAT (2) SMDR, CAS (3) DTU (4) RESERVED TN726 DATA LINE CP TN726 DATA LINE CP Z3A4 ADU ZTN142 CPU/MEM CP SAT, SMDR, CAS (OFF-PREMISES DIRECT CONNECTION) MODEM (212-TYPE) CO SAT, SMDR, CASE (OFF-PREMISES SWITCHED CONNECTION)† MODEM
FUNCTIONAL DESCRIPTION SINGLE-LINE VOICE TERMINALS (42, 500, 2500-SERIES, 7101A, 7102A) — — — — — — — — — — RECORDED ANNOUNCEMENTS — — — — — — — — — — DICTATION EQUIPMENT — — — — — — — — — — EXTERNAL ALERTING DEVICES — — — — — — — — — — PART OF DIGITAL SWITCH ZTN78 TIP RING LINE CP OR TN742 ANALOG LINE CP MUSIC-ON-HOLD MULTILINE (7300H-TYPE TERMINALS — — — — — — — — — — DIRECT TRUNK ATTENDANT CONSOLE OR SWITCHED LOOP ATTENDANT CONSOLE — — — — — — — — — — ZTN79 ATL LINE CP ATTENDANT DIRECT EXTE
FUNCTIONAL DESCRIPTION The SAKI also does the following functions: — Identifies the circuit pack to the Common Control (location and vintage) — Controls status indicator Light-Emitting Diodes (LEDs) — red (failure), green (translated), and yellow (circuit busy) — Initiates power-on startup procedures — Checks the on-board microprocessor for sanity and causes reinitialization in case of problems — Takes NPEs out of service under control of the on-board microprocessor — Resets the protocol handler
FUNCTIONAL DESCRIPTION ● NPE (Network Processing Element) Each port circuit pack contains one or two NPEs. The Analog Line, ATL Line, Tip Ring, Data Line, Ground Start, Loop Start, and DID Trunk Circuit Packs contain two NPEs. The MET Line, Auxiliary Trunk, and Tie Trunk Circuit Packs contain one NPE. The NPEs do switching network functions for the port circuits. Under control of the on-board microprocessor, an NPE can connect a port circuit to any one of the TDM bus time slots.
FUNCTIONAL DESCRIPTION Figure 3-7. Analog Line (TN742) Unique Circuitry ● Port Circuits The eight port circuits are identical. Each port circuit consists of a coder/decoder (codec), hybrid circuit, electronic battery feed circuit, ring relay, and overvoltage surge protection circuit. The codec is a 4-wire circuit that converts the analog signal from a voice terminal to a PCM data signal. It converts an incoming PCM data signal from the NPEs to an analog signal.
FUNCTIONAL DESCRIPTION The electronic battery feed circuit provides talking battery to the voice terminal. It also produces a controlled dc battery feed for short and long loops, detects when a receiver is lifted, and provides the message waiting signal by periodically turning off the feed voltage. The ring relay provides the interface between the ringing application circuit and the port circuit. It causes ringing turn on and turn off.
FUNCTIONAL DESCRIPTION TO MULTILINE VOICE TERMINALS AND ATL CORDED AND CORDLESS TELEPHONES Figure 3-8.
FUNCTIONAL DESCRIPTION Auxiliary Trunk (TN763) The Auxiliary Trunk Circuit Pack (Figure 3-9) interfaces four ports provided for customerprovided equipment (CPE) and the TDM bus. It is connected to the CPE by up to three pairs of wires. The transmission pair (T and R) carry voice signals and touch-tone control signals. The T and R also provide a loop start seizure indication to the CPE. The seizure pair (SZ and SZ1) provide seizure indication to the CPE.
FUNCTIONAL DESCRIPTION ON-BOARD MICROPROCESSOR TO AUXILIARY EQUIPMENT Figure 3-9. Auxiliary Trunk (TN763) Unique Circuitry Data Line (TN726) The Data Line Circuit Pack (Figure 3-10) interfaces eight Asynchronous Data Units (ADUs) data devices and the TDM bus. The ADUs are typically, in turn, connected to RS-232 type devices.
FUNCTIONAL DESCRIPTION Figure 3-10.
FUNCTIONAL DESCRIPTION ● Port Circuits Each of the eight identical port circuits allows the connection of interface equipment having an RS-232 compatible serial interface to the switch. The circuit provides asynchronous full duplex data transport at standard speeds from 300 to 19,200 bps and a low data rate (<300 bps). Each port includes an Asynchronous Data Unit (ADU) to extend the serial communications link length and provide safe isolation.
FUNCTIONAL DESCRIPTION NPE 0 NPE 1 ON-BOARD MICROPROCESSOR TO CENTRAL OFFICE Figure 3-11. DID Trunk (TN753) Unique Circuitry Ground Start Trunk (ZTN76j The Ground Start Trunk CP (Figure 3-12) interfaces eight central office trunks and the TDM bus. The Ground Start Trunk has the following unique circuitry: ● Ground Detector Circuit The ground detector circuit determines if ground has been applied to the tip lead for incoming seizure.
FUNCTIONAL DESCRIPTION NPE 0 NPE 1 TO CENTRAL OFFICE ON-BOARD MICROPROCESSOR Figure 3-12. ● Ground Start Trunk (ZTN76) Unique Circuitry Port I/O Circuit This circuit consists of bus expanders for communication between the on-board microprocessor and the port circuits. It receives commands from the on-board microprocessor and distributes them to the individual port circuits. It also accesses the port circuit scan points and passes the information to the on-board microprocessor.
FUNCTIONAL DESCRIPTION Loop Start Trunk (ZTN77) The Loop Start Trunk Circuit Pack interfaces eight central office loop start trunks and the TDM bus. Figure 3-13 shows the Loop Start Trunk unique circuitry. NPE 0 NPE 1 TO CENTRAL OFFICE ON-BOARD MICROPROCESSOR Figure 3-13. ● Loop Start Trunk (ZTN77) Unique Circuitry Port I/O Circuit This circuit consists of bus expanders for communication between the on-board microprocessor and the port circuits.
FUNCTIONAL DESCRIPTION operates the appropriate relay. The relays control circuitry provides the proper signaling for loop start trunks. The trunks support touch-tone dialing and dial pulse signaling. The surge protection circuit provides overvoltage lightning surge protection for the circuit pack. MET Line (TN735) The MET Line Circuit Pack interfaces four Multibutton Electronic Telephone (MET) lines and the TDM bus. The MET Line unique circuitry consists of four port circuits as shown in Figure 3-14.
FUNCTIONAL DESCRIPTION switchhook information is also sent over these channels. The electronic power feed device provides phantomed -48 volt dc power for the MET terminals over the data channels. The electronic power feed device is a “smart” circuit breaker. When it senses an overcurrent condition, it indicates the condition on an output lead and goes into thermal shutdown if not turned off by the on-board microprocessor.
FUNCTIONAL DESCRIPTION Tie Trunk (TN760B) The Tie Trunk Circuit Pack (Figure 3-15) interfaces four 6-wire tie trunks and the TDM bus. Two tip and ring pairs form a 4-wire analog transmission line. An E and M pair are used for signaling. The T and R pair transmit analog signals from the circuit pack. The T1 and R1 pair receive analog signals from the tie trunk. The E and M pair are dc signaling leads used for call setup handshaking.
FUNCTIONAL DESCRIPTION The signaling type is administrable for each port. Table 3-B summarizes the conditions present as the transmit and receive control signals for each signaling type. Table 3-C lists the preferred TN760B tie trunk signaling format to be used in the likely-to-be-encountered installation situations. Figure 3-15. Tie Trunk (TN760B) Unique Circuitry UNPROT. PORT: 4 3 2 1 PROT. Figure 3-16.
FUNCTIONAL DESCRIPTION Table 3-B. Signaling Signaling Type Summary Transmit Receive Type On-Hook Off-Hook On-Hook Off-Hook I Std. grd bat open/bat (*) grd I Compat. open/bat (*) grd grd open/bat (*) V open grd open grd * An open circuit is preferred over voltage. Table 3-C.
FUNCTIONAL DESCRIPTION Tip Ring Line (ZTN78) The Tip Ring Line Circuit Pack interfaces eight analog tip and ring voice terminal lines (single-line voice terminals) and the TDM bus. Figure 3-17 shows the Tip and Ring Line unique circuitry. The TN742 can be used instead of the ZTN78 Tip Ring CP. The TN742 supports up to five bridged single-line voice terminals; however, only two can be off-hook at one time. The ZTN78 does not support bridged terminals.
FUNCTIONAL DESCRIPTION ● Port I/O Circuit This circuit includes bus expanders connecting the on-board microprocessor and the port circuits. It receives commands from the on-board microprocessor and distributes them to the individual port circuits. It also accesses the port circuit scan points and passes the information to the on-board microprocessor.
FUNCTIONAL DESCRIPTION ● Bus Buffers There are four bus buffers on the circuit pack. The clock driver and receive buffers interface three system clock signals (2.048 MHz, 8 kHz, and 160 kHz) to the TDM bus. Two buffers interface the system tones (see Table 3-A) between the TDM bus and the Service Circuit CP. Music is not provided by the Service Circuit but can be provided via a port interface on a Tip Ring Line CP (ZTN78).
FUNCTIONAL DESCRIPTION ● On-Board Microprocessor With External RAM This circuit functions the same as the microprocessor in the common circuitry for the intelligent port circuits. In addition, it tells the dual-port RAM in the time slot table circuit the appropriate time slots in which to place a tone. The external RAM also has work space for complex tones (i.e., those tones that vary with time). ● Clock Circuit The clock circuit consists registers. The clock circuit circuitry.
FUNCTIONAL DESCRIPTION Port I/O and Sanity Check Circuit ● This circuit interfaces the on-board microprocessor to the port circuits and checks the sanity status of the DSPS of the port circuit. Tone Detector (TN748B) The Tone Detector Circuit Pack provides four touch-tone receivers and two general purpose tone receivers that detect appropriate system and network tones on the TDM bus.
FUNCTIONAL DESCRIPTION ● Port Circuits There are eight port circuits. Six port circuits are connected to Network Processing Elements (NPEs). Port circuits 0, 1, 4, and 5 are DTMF tone detector ports. Each of the six port circuits has an associated Digital Signal Processor (DSP), NPE to DSP interface circuitry, a DSP restart circuit and an interrupt filter. Port circuits 2 and 6 are general purpose tone detector ports. Port circuits 3 and 7 provide digital loopback testing of each NPE on the circuit pack.
FUNCTIONAL DESCRIPTION TDM BUS LEADS CIRCUIT PACK ADDRESS LEADS Figure 3-20. ● Pooled Modem (TN758) Common Circuitry The Pooled Modem contains the same common circuitry as port CPs. ● Conversion Resources The two conversion resources (port circuits) are identical and each contain the following: — Microprocessor — Transmit and Receive I-channel Controller (TRIC) — Universal Synchronous/Asynchronous Receiver and Transmitter (USART) — Data USART Clock (DUCK) — Digital Signal Processor (DSP).
FUNCTIONAL DESCRIPTION information. It also allows the port circuit microprocessor to inform the on-board microprocessor of various port circuit status information. The DUCK and TRIC interface I-channel information between the port circuit and the remote data module. The microprocessor controls the operation of the DUCK and the TRIC by programming their internal registers.
FUNCTIONAL DESCRIPTION Software The System software consists of switched services, administrative, and maintenance software. This software runs on top of the real-time operating system software. Switched Services Software The switched services software provides voice and data call processing. This software resides in the Common Control circuitry and in the 8-bit on-board microprocessors located in the port and service circuits.
FUNCTIONAL DESCRIPTION Memory Allocation The system software, like the hardware, is identified by release and version number. Each version identifies a particular memory configuration for the release number. Main memory is located in the Common Control circuitry, that is, the CPU/MEM Circuit Pack. Real-Time Constraints Real-time constraints are a function of the speed of the common control circuitry and the traffic load.
FUNCTIONAL DESCRIPTION Figure 3-21.
FUNCTIONAL DESCRIPTION Memory Administration and Feature Code Modules, which includes Station Call Processing, are software tasks associated with memory. Each task controls the storage and movement of data and messages between elements in the system. ● Administration Provides for administration of station and system features. This software also supports maintenance procedures related to error checking and diagnosing trouble.
FUNCTIONAL DESCRIPTION ● Operating System (OS) Controls all message and data flow to/from memory, to the Arch Angel Driver Interface, to the microprocessors on the port circuit packs, and to the RS-232 driver interfaces. Messages destined for a particular task are queued until the associated task can receive them. When a task has completed a particular process, the next message is obtained from the message queue of the tasks. The OS provides an interval timer that is used to time tasks.
FUNCTIONAL DESCRIPTION 5. The OS checks a message directory to determine which task (i.e., software module) is to receive the message. A function of the OS referred to as the “transformer” determines it has a message for the Station Call Processing task and queues the message in RAM. 6. The Station Call Processing task retrieves its message and interprets it as a call origination. The task determines whether there is an idle call appearance button (System Access button) on the called voice terminal.
FUNCTIONAL DESCRIPTION 18. When either of the parties hangs up, the associated port circuit controller sends an up-link message to the Station Call Processing task. 19. Station Call Processing interprets the on-hook message as the end of the call. 20. The task then sends a down-link message to the port circuit pack controllers to disconnect the time slot connections and turn off the LEDs associated with the calls.
HARDWARE DESCRIPTION System Cabinets (J58901A1 L4) 4-1 Cabinet 1 (Control and Port Circuits) 4-4 Cabinets 2 and 3 (Port Circuits) 4-4 Cabinet Address Plug 4-6 Circuit Packs 4-7 Required Circuit Packs 4-8 Optional Circuit Packs 4-9 Station Port Circuit Packs 4-9 Trunk Port Circuit Packs 4-11 System Resource Circuit Packs 4-12 Circuit Pack Compatibility 4-13 Circuit Pack Features 4-13 Terminal Equipment 4-14 Voice Terminals 4-14 Single-Line Voice Terminals 4-16 500 Series 4-16
7313H01A Voice Terminal (BIS-10) (PEC 3165-10B) 4-38 7314H01A Voice Terminal (BIS-22) (PEC 3166-22B) 4-40 7316H01A Voice Terminal (BIS-34) (PEC 3167-34B) 4-42 7317H01A Voice Terminal (BIS-34D) (PEC 3167-DSB) 4-44 10-Button MET Set (2991C/D05) 4-46 10-Button MET Set With Built-In Speakerphone (2993C04) 4-48 12-Button MET Set (7203M) 4-50 ATL Cordless Telephone (5-Button) (PEC 3168MLC) 4-52 Multiline Voice Terminal Connection Information 4-54 Multiline Voice Terminal Feature Operations 4-54
ADU Connections Auxiliary Equipment Connections 4-68 4-68 -iii-
Figures Figure 4-1. System 25 Cabinets (J58901A)—3-Cabinet System 4-3 Figure 4-2. System Cabinet (J58901A)—Rear View 4-4 Figure 4-3. System Circuit Pack Configurations 4-5 Figure 4-4. 2500 Series Analog Voice Terminals 4-17 Figure 4-5. 2526BMWG Voice Terminal 4-19 Figure 4-6. 7101A Voice Terminal 4-20 Figure 4-7. 420 Speakerphone Voice Terminal 4-22 Figure 4-8. 7302H01D Voice Terminal (5-Button) 4-25 Figure 4-9. 7303H01D Voice Terminal (10-Button) 4-27 Figure 4-10.
Figure 4-31. Out-of-Building 7300H Series Multiline Voice Terminal Connections 4-72 Figure 4-32. MET Set Connections 4-73 Figure 4-33. Stand-Alone Remotely Powered Multiline Voice Terminal and ATL Cordless Telephone Connections 4-74 Typical ADU Connections—Supporting Data Terminal and SingleLineVoiceTerminal 4-75 Typical ADU Connections— Supporting Data Terminal and 7300H Series Multiline Voice Terminal 4-76 Figure 4-36. Typical MADU Connections 4-77 Figure 4-37.
HARDWARE DESCRIPTION HARDWARE DESCRIPTION This Section provides descriptions of System 25 hardware components and their functions. The hardware is covered under the following major headings: ● System Cabinets: Includes circuit pack (CP) carriers, power supplies, wiring, and cooling equipment. ● Circuit Packs: Includes detailed information on CPs. ● Terminal Equipment: ports. ● Peripheral Equipment: Equipment that can be connected to the CPU/MEM CP.
HARDWARE DESCRIPTION The cabinets have a brown front cover with beige top and sides. The front cover has a system identification stripe across the top. The top has four indentations to facilitate the stacking of cabinets. Each cabinet is constructed of sheet metal and is 13 inches high, 17 inches wide, and 21 inches deep and weighs about 75 pounds fully loaded. A 3-cabinet system occupies a vertical space of about 40 inches. It is recommended that the cabinets be placed on a deskor table-top.
HARDWARE DESCRIPTION — CABINET 3 (12 PORT CIRCUIT PACKS) — CABINET 2 (12 PORT CIRCUIT PACKS) — CABINET 1 (CONTROL AND SERVICE CIRCUITS; 10 PORT CIRCUIT PACKS) Figure 4-1.
HARDWARE DESCRIPTION CAUTION & WARNING LABELS SYSTEM 25 J58901A FCC LABEL GROUNDING BLOCK VOLTS AC AMPS HZ INPUT AC POWER RECEPTACLE 25-PAIR CONNECTORS Figure 4-2. ON/OFF SWITCH System Cabinet (J58901A)—Rear View Cabinet 1 (Control and Port Circuits) Cabinet 1 (Figure 4-3) is always required. It provides mounting space for 12 CPs and can support a small telecommunications system (for example, 50 to 60 stations and 10 to 15 trunks.
HARDWARE DESCRIPTION CIRCUIT PACK SLOTS POWER SUPPLY 1 3 2 4 5 6 7 8 9 10 11 12 11 12 PORT CIRCUITS SERVICE CIRCUIT CPU/MEM CABINET 1—MOUNTING FOR CONTROL & PORT CIRCUIT PACKS CIRCUIT PACK SLOTS POWER SUPPLY 1 2 3 4 5 6 7 8 9 10 PORT CIRCUITS CABINET 2 OR 3—MOUNTING FOR PORT CIRCUIT PACKS NOTES: 1. REFER TO TECHNICAL SPECIFICATIONS, SECTION 5 FOR CIRCUIT PACK UNIT LOAD INFORMATION. 2. DIVIDE THE TOTAL NUMBER OF VOICE TERMINAL AND TRUNK CIRCUIT PACKS BETWEEN THE CABINETS USED.
HARDWARE DESCRIPTION Cabinet Address Plug An address plug is provided on the middle of the backplane of each cabinet (accessible after removing the top rear cover) and is used to designate the cabinet number to the software. When address plug is plugged into the designated area at CP slot 5, the cabinet is identified as Cabinet 1 at slot 6 as Cabinet 2, and at slot 7 as Cabinet 3. Table 4-A.
HARDWARE DESCRIPTION Circuit Packs This part describes required and optional System 25 Circuit Packs (CPs) and their compatibility and features. Required CPs are the CPU/MEM and the Service Circuit. Optional CPs are the Station Port CPs, Trunk Port CPs, Pooled Modems, and Tone Detectors; the latter two CPs, plus the Service Circuit, are also classified as System Resources. Table 4-B lists the CPs of System 25. For more detailed functional descriptions of the CPs, refer to Section 3 of this manual.
HARDWARE DESCRIPTION Required Circuit Packs The following CPs are provided with all Release 3 systems and must be mounted in Cabinet 1: ● ZTN142 CPU/MEM (Call Processing Unit/Memory) The ZTN142 (one per system) provides a central processing unit, Random-Access Memory (RAM) (memory) for call and feature processing, interrupt controller, programmable timers, real time clock, status display, processor bus interface, and four interface ports.
HARDWARE DESCRIPTION Optional Circuit Packs The following CPS are optional and can be mounted in any slot not occupied by the required CPS. Station Port Circuit Packs ● TN726 Data Line Provides eight ports for Asynchronous Data Units (ADUs). Used for in-building service within 2000 feet of the system cabinets. Data speeds from 300 bps to 19.2 Kbps are supported. Service beyond 2000 feet at less than 19.2 Kbps is supported; see Section 5 “Technical Specifications.
HARDWARE DESCRIPTION Provides eight ports for MERLIN® Communications System voice terminals and ATL cordless telephones. Used for service within 2000 feet of the system cabinets; ATL cordless telephones and corded multiline voice terminals more than 1000 feet from the system cabinet require local power. Off-premises extensions are not supported, Out-of-Building stations require In-Range Out-of-Building (IROB) units.
HARDWARE DESCRIPTION Trunk Port Circuit Packs ● TN753 DID Trunk Provides eight ports for immediate-start or wink-start Direct Inward Dialing (DID) trunks. ● TN760B Tie Trunk Provides four ports for Type 1 E&M, Type 1 E&M Compatible, or Type 5 Simplex tie trunks. Operating protocols include automatic, immediate-start, wink-start, or delay dial.
HARDWARE DESCRIPTION System Resource Circuit Packs ● TN748B and TN748C Tone Detector Provides four touch-tone receivers; the system can have a maximum of two TN748B or TN748CS, depending on the number of stations and the conditions in Table 4-C. One TN748B or TN748C CP must be used in addition to the ZTN131 Service Circuit in accordance with Table 4-C. Tone Detector Requirements Table 4-C. Number of Tone Detector (TN748B or TN748C) CPs ● Traffic (Calls/Hr.
HARDWARE DESCRIPTION Circuit Pack Compatibility The following System 75 CPs can be used in System 25, if required: ● The TN742 and TN746B Analog Line circuit packs can be used instead of the ZTN78 Tip Ring CP. The TN742 and TN746B support bridged stations and out-of-building or Off Premises Stations (OPS), the ZTN78 does not. The TN746B will only function properly in R3V3 systems. ● The TN762B Hybrid Line (Version 4 or later) can be used instead of the ZTN79.
HARDWARE DESCRIPTION — CPU/MEM CP: Green status LED only. “Off” for several seconds during power up and test, then lamp flashes to indicate an “OK” state. Steady “Off” or “On” indicates a problem. — System Resource CPs: Service Circuit CP - Similar to port CPs except yellow LED flashes to show system clock is active and is steadily “On” when a tone receiver is in use. “Off” indicates a problem. Modem Pool and Tone Detector CPs - Same as Port CPs.
HARDWARE DESCRIPTION Table 4-D. TERMINAL TYPE * Single-Line Tip Ring (Analog) † MERLIN Sys.
HARDWARE DESCRIPTION Single-Line Voice Terminals Single-line terminals can have only one incoming call ringing when the terminal is idle. The user at any busy single-line terminal can put an active call on hold and either originate a call or answer a waiting/camped-on call. Single-line terminals have access to most system features that do not require operation of programmable buttons.
HARDWARE DESCRIPTION ● Model 2500MMGB—Basic desk set (PEC 3100-1TD) ● Model 2500MMGT—Basic desk set with Recall button (PEC 3100-TRC) ● Model 2500SM—Basic desk set that can be used with a 4A Speakerphone (PEC 3100-2TD) ● Model 2514BMW—Basic desk set equipped with built-in headset jack ● Model 2554BM—Basic wall-mounted set (PEC 3100-TWR). Adjuncts: Refer to Table 4-E.
HARDWARE DESCRIPTION Table 4-E.
HARDWARE DESCRIPTION 2526BMWG Voice Terminal This analog terminal (Figure 4-5) consists of a standard touch-tone wall set equipped with a special faceplate and mounted in a weatherproof housing. The door of the housing can be fitted with an optional lock. This voice terminal is intended for outdoor use on buildings. fences, or poles. The 2526BMWG set can be connected for one line or two lines. It is approximately 13 inches high, 7 inches wide, and 6-1/2 inches deep.
HARDWARE DESCRIPTION 7101A Voice Terminal (MD) (PEC 3170-00M) The Model 7101A single-line analog voice terminal (Figure 4-6) is about 2-3/4 inches wide, 31/2 inches high, and 8-1/2 inches deep. The set comes equipped with the following: ● Handset ● Touch-Tone Dial ● Message Indicator ● Tone Ringer with Volume Control ● Two Fixed Feature Buttons — Recall - Used to place a call on hold and to obtain recall dial tone for Conference, Transfer, and other features accessible by feature access code.
HARDWARE DESCRIPTION 420 Speakerphone Voice Terminal (Not Orderable) The 420 Speakerphone voice terminal (Figure 4-7) is a single-line analog set that can be desk or wall mounted. The 420 Speakerphone set can no longer be ordered.
HARDWARE DESCRIPTION MEMORY BUTTONS PROGRAM BUTTON FLASH BUTTON HOLD BUTTON AND LAMP SPEAKERPHONE AND LAMP BUTTON MUTE BUTTON RINGER VOLUME CONTROL Figure 4-7. SPEAKER VOLUME CONTROL RECEIVER VOLUME CONTROL 420 Speakerphone Voice Terminal Single-Line Voice Terminal Connection Information Single-line voice terminal connection information is provided under the “Connectivity” heading later in this Section.
HARDWARE DESCRIPTION Multiline Voice Terminals The recommended multiline terminals for System 25 is the ATL cordless telephone and the 7300H Series hybrid sets that are also used with the MERLIN Communications System. Multibutton Electronic Telephone (MET) sets already available to the customer can be reused in a System 25 installation but are not orderable. Multiline voice terminals have programmable buttons that can be assigned for handling calls and for controlling features.
HARDWARE DESCRIPTION 7302H01D Voice Terminal (5-Button) (PEC 3160-111) The 7302H01D voice terminal (Figure 4-8) can be desk or wall mounted and is about 5-3/4 inches wide, 5-1/4 inches high, and 8-1/2 inches deep.
HARDWARE DESCRIPTION HANDSET TEST/PROGRAM SWITCH (ON SIDE) PROGRAMMABLE BUTTONS (5) WITH I-USE AND STATUS LEDs SPEAKER/RING VOLUME CONTROL (ON SIDE) Figure 4-8.
HARDWARE DESCRIPTION 7303H01D Voice Terminal (10-Button) PEC 3161-172 The 7303H01D voice terminal (Figure 4-9) can be desk or wall mounted and is about 7 inches wide, 5-1/4 inches high, and 8-1/2 inches deep.
HARDWARE DESCRIPTION TEST/PROGRAM SWITCH (ON SIDE) PROGRAMMABLE BUTTONS (10) WITH I-USE AND STATUS LEDs HANDSET TOUCH DIAL PAD SPEAKER/RING VOLUME CONTROL (ON SIDE) MESSAGE Figure 4-9.
HARDWARE DESCRIPTION 7305H01D Voice Terminal (34-Button) (MD) (PEC 3162-412) The 7305H01D voice terminal (Figure 4-10) can be desk or wall mounted and is about 10-1/4 inches wide, 5-1/2 inches high, and 8-1/2 inches deep. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
HARDWARE DESCRIPTION I-USE/STATUS LEDs HANDSET Figure 4-10.
HARDWARE DESCRIPTION 7305H02D Voice Terminal (34-Button Deluxe) (PEC 3162-417) The 7305H02D voice terminal (Figure 4-11) is available for general use and as a Direct Trunk Attendant Console. The voice terminal is about 10-1/4 inches wide, 5-1/2 inches high, and 8-1/2 inches deep.
HARDWARE DESCRIPTION † On the first Attendant Console, the first of the Direct Facility (Pooled) Access buttons defaults to loop-start trunks, the second to ground-start trunks, and the third to tie trunks. For any trunk type not assigned in the system, the associated button does not receive a default assignment. On the second Console, these buttons do not receive default assignments. Adjuncts: ● 502B Headset Adapters Note: ● The 502B unit provides HFAI service on the headset.
HARDWARE DESCRIPTION 7305H03B Voice Terminal (BIS) (PEC 3162-BIS) The 7305H03B voice terminal (Figure 4-12) is available for general use and as a Direct Trunk Attendant Console. It can be desk or wall mounted and is about 9-1/2 inches wide, 5-1/4 inches high, and 9-1/4 inches deep.
HARDWARE DESCRIPTION Number Dialed (1). ** On the first Attendant Console, the first 15 trunks in the system are assigned button appearances on the console. If there are fewer than 15 trunks, the remaining buttons are not assigned. On the second Console, these trunks do not receive default assignments. † On the first Attendant Console, the first of the Direct Facility (Pooled) Access buttons defaults to loop-start trunks, the second to ground-start trunks, and the third to tie trunks.
HARDWARE DESCRIPTION 7305H04C Voice Terminal (BIS With Display) (PEC 3162-DIS) The 7305H04C voice terminal (Figure 4-13) is available for general use and as a Switched Looped Attendant Console (SLAC). Display capability can be administered for SLACs or general use positions. In general use, this terminal can be desk or wall mounted; as a console, it is normally desk mounted.
HARDWARE DESCRIPTION — Twelve others predefined as Inspect, Attendant Message Waiting, Alarm, Local, Scroll, Forced Release, Start, Source, Release, Destination, Cancel, and Join. — Other seventeen programmable; default assignments are Flex DSS (15), Position Busy (1), and Last Number Dialed (1). Note: Programmable buttons without LEDs should be used only for features that do not require I-Use and Status indications.
HARDWARE DESCRIPTION 7309H01B Voice Terminal (HFAI) (PEC 3161-161) The 7309H01B voice terminal (Figure 4-14) can be desk or wall mounted. It is about 6-1/4 inches wide, 8-3/4 inches deep, and (not including the handset) 1-1/2 inches thick; when desk mounted, it is about 5-1/4 inches high in the back.
HARDWARE DESCRIPTION Figure 4-14.
HARDWARE DESCRIPTION 7313H01A Voice Terminal (BIS-10) (PEC 3165-10B) This 7313H01A 10-button terminal (Figure 4-15) can be desk or wall mounted. It is about 61/4 inches wide, 8-3/4 inches deep, and (not including the handset) 1-1/2 inches thick; when desk mounted, it is about 5-1/4 inches high in the back.
HARDWARE DESCRIPTION Figure 4-15.
HARDWARE DESCRIPTION 7314H01A Voice Terminal (BIS-22) (PEC 3166-22B) The 7314H01A 22-button voice terminal (Figure 4-16) can be desk or wall mounted. It is about 8-1/4 inches wide, 9-1/4 inches deep, and (not including the handset) 1-1/2 inches thick; when desk mounted, it is about 5-1/4 inches high in the back.
HARDWARE DESCRIPTION Figure 4-16.
HARDWARE DESCRIPTION 7316H01A Voice Terminal (BIS-34) (PEC 3167-34B) The 7316H01A 34-button voice terminal (Figure 4-17) is available for general use or as a Direct Trunk Attendant Console. It can be desk or wall mounted and is about 9-1/4 inches wide, 9-1/4 inches deep, and (not including the handset) 1-1/2 inches thick; when desk mounted, it is about 5-1/4 inches high in the back.
HARDWARE DESCRIPTION ** On the first Attendant Console, the first 15 trunks in the system are assigned button appearances on the console. If there are fewer than 15 trunks, the remaining buttons are not assigned. On the second Console, these trunks do not receive default assignments. † On the first Attendant Console, the first of the Direct Facility (Pooled) Access buttons defaults to loop-start trunks, the second to ground-start trunks, and the third to tie trunks.
HARDWARE DESCRIPTION 7317H01A Voice Terminal (BlS-34D) (PEC 3167-DSB) The 7317H01A 34-button voice terminal with display (Figure 4-18) is available for general use and as a SLAC. In general use, it can be desk or wall mounted; as a console, it is normally desk mounted. Display can be administered for SLACs and general use positions. The set is about 9-1/4 inches wide, 9-1/4 inches deep, and (not including the handset) 1-1/2 inches thick; when desk mounted, it is about 5-1/4 inches high in the back.
HARDWARE DESCRIPTION — Twelve others predefined as Alarm, Source, Destination, Inspect, Local, Cancel, Start, Scroll, Forced Release, Attendant Message Waiting, Join, and Release. — Other seventeen programmable; default assignments are Flex DSS (15), Position Busy (1), and Last Number Dialed (1). Adjunct: ● 502B Headset Adapters Note: The 5026 unit provides HFAI service on the headset. Figure 4-18.
HARDWARE DESCRIPTION 10-Button MET Set (2991C/D05) The 10-Button MET set (Figure 4-19) may be desk or wall mounted. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
HARDWARE DESCRIPTION Figure 4-19.
HARDWARE DESCRIPTION 10-Button MET Set With Built-In Speakerphone (2993C04) The 10-Button MET set with BIS (Figure 4-20) can be desk or wall mounted. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
HARDWARE DESCRIPTION Figure 4-20.
HARDWARE DESCRIPTION 12-Button MET Set (7203M) The 12-Button MET set (Figure 4-21) is a freestanding voice terminal. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
HARDWARE DESCRIPTION Figure 4-21.
HARDWARE DESCRIPTION ATL Cordless Telephone (5-Button) (PEC 3168MLC) The ATL Cordless Telephone (Figure 4-22) consists of a handset plus a base. The telephone with the handset placed in the cradle measures 5 inches wide, 2 1/2 inches high, and 8 1/4 inches deep, and weighs about 2 pounds and 9 ounces. The antenna on the base extends about 2 feet. The base has the option to accept a 7-inch flexible antenna or a 9-inch rigid antenna.
HARDWARE DESCRIPTION ● Tone ringer and volume control ● Security controls, antenna, handset battery charger. Adjuncts: None LINE APPEARANCE WITH I-USE AND STATUS LEDs TOUCH DIAL PAD TELEPHONE MODE SWITCH VOLUME CONTROL BASE HANDSET Figure 4-22.
HARDWARE DESCRIPTION Multiline Voice Terminal Connection Information Detailed connection information is provided under the “Connectivity” heading later in this Section. Maximum cabling distances from the system cabinets to multiline voice terminals is provided in Section 5, “Technical Specifications.” Multiline Voice Terminal Feature Operations Refer to Multiline Terminal User Guide (555-530-703) for information about feature operation.
HARDWARE DESCRIPTION Voice Terminal Adjuncts The following adjuncts and associated power supplies are supported on corded multiline sets only: ● MET Headset Adapter (for 10-Button MET sets); refer to “Headset Adapter Adjunct” in Section 2. ● 500A/502B Headset Adapter (for 12-Button MET sets and MERLIN System voice terminals): refer to “Headset Adapter Adjunct” in section 2.
HARDWARE DESCRIPTION Voice Terminal Adjunct Power Supplies Table 4-F provides a summary of the supplemental power supplies and their applications. Table 4-F. POWER SUPPLY Supplemental Voice Terminal Power Supplies OUTPUT FOR USE WITH 2012D Transformer 18 V ac ADUs (except Z3A5). MET sets that require local power 500A Headset Adapter. S101A Speakerphone. KS-22911, L1 Power Supply -48 V dc Selector Console. Z3A5 ADU. 7300 H-Series sets that require local power. 502B Headset Adapter (see note).
HARDWARE DESCRIPTION Asynchronous Data Units (ADUs) Asynchronous Data Units and Multiple Asynchronous Data Units (MADUs) provide an interface between ports on the TN726 Data Line CP and RS-232 Data Terminal Equipment (DTE) or Data Communications Equipment (DCE). The DTE is equipment that provides a data source, termination, or both—a host computer, printer, or a data terminal are examples of DTE.
HARDWARE DESCRIPTION ● An analog single-line voice terminal (2500 or 7100 series) or a 7300H series multiline voice terminal (Z3A5 ADU required) can be connected to the ADU, allowing the voice terminal and DTE to share a common wall jack and 4-pair cable run back to the SIP. Note: Neither off-premises nor out-of-building service can be provided with ADUs. For additional information on ADUs, see Z3A Asynchronous Data Unit User Manual (555-401701).
HARDWARE DESCRIPTION Table 4-G. UNIT Asynchronous Data Units PEC FEATURE Z3A1 2169-001 3-foot plug-ended EIA connector and mod jack for single-line set. Z3A2 2169-002 EIA plug and mod jack for single-line set. Z3A4 2169-004 3-foot receptacle-ended EIA cord and mod jack for single-line set. Z3A5 62506 3-foot plug-ended EIA connector and mod jack for hybrid set. (PEC includes KS-22911 L1 power supply and D8W-87 cord.) MADU 2169-005 Self-powered.
HARDWARE DESCRIPTION Peripheral Equipment Peripheral Equipment includes the following devices that connect to the call processing portion of the CPU/MEM (ZTN130) CP: ● System Administration Terminal (SAT); refer to “System Administration” in Section 2. ● Digital Tape Unit (DTU); refer to “Digital Tape Unit” in Section 2. ● Station Message Detail Recording (SMDR) printer or Call Accounting System (CAS); refer to “Station Message Detail Recording” or “Call Accounting System” in Section 2.
HARDWARE DESCRIPTION Optional Power Equipment In addition to the power supplies already mentioned, the following equipment can be used with System 25. Uninterruptible Power Supply The AT&T 1KVA Uninterruptible Power Supply (UPS) Model 010U111 PEC 2403-004 is recommended. At maximum load the UPS will bridge a 5-minute power outage. The UPS must be connected to the common System 25 power outlet. One UPS will support a 2cabinet system.
HARDWARE DESCRIPTION Connectivity System 25 requires 4-pair building wiring that conforms to AT&T Premises Distribution System (PDS) specifications. Various cords, cables, adapters, and connecting blocks are used to facilitate the connection of equipment and associated cable and wire. Major points of connectivity include the following: ● The system cross-connect field located on a wall adjacent to the system cabinets.
HARDWARE DESCRIPTION LEGEND: A B C OPS SIP D E F - SINGLE-ENDED 25-PAIR CONNECTOR CABLE (A25D)* 3 TO 1 SPLITTER CONNECTORIZED CABLE - PEC 2720-06X 2 TO 1 SPLITTER CONNECTORIZED CABLE - PEC 2720-05X OFF-PREMISES STATION STATION INTERCONNECT PANEL* OCTOPUS CABLE - PEC 2720-05P INSIDE WIRE* TRUNK ACCESS EQUIPMENT (TAE) CONNECTOR BLOCK* * - FURNISHED BY INSTALLER Figure 4-24.
HARDWARE DESCRIPTION Station Interconnect Panel (SIP) The Station Interconnect Panel (SIP) provides for the connection of the terminals (voice and data), peripheral equipment, and some auxiliary equipment of the system to station port CPS. This equipment includes voice terminals, attendant consoles, data terminals, System Administration Terminal, Digital Tape Unit, and Call Accounting System. The SIP is made up of 617A Panels and associated adapters.
HARDWARE DESCRIPTION Figure 4-25.
HARDWARE DESCRIPTION Figure 4-26 shows voice terminal connections to the system cabinets via the SIP. Typically, voice terminals are plugged into modular wall jacks that provide a cut-down block for building wiring. At the SIP, 858A Adapters provide a cut-down point for 4-pair wire runs. An octopus cable (PEC 2720-05P) from a station CP provides 25-pair connectorized cabling to eight 4pair modular jacks. Each jack is terminated on the SIP by an 858A Adapter.
HARDWARE DESCRIPTION Connectivity Figures Figures 4-27 through 4-37 provide connection information for various equipment. These figures have been included as an aid to understanding how equipment can be connected to System 25 and to indicate required connecting and supporting equipment. Other arrangements are possible; these figures can be useful in developing connecting arrangements for new or customer-provided equipment.
HARDWARE DESCRIPTION ADU Connections Figures 4-34 and 4-35 provide connection information for data terminals and associated single-line or multiline voice terminals. The voice terminal and data terminal leads are separated at the SIP with a Y-adapter and are connected to their respective station ports. Figure 4-36 presents a typical Multiple Asynchronous Data Unit (MADU) connection. Figure 4-37 shows local power connections for Z3A1, Z3A2, and Z3A4 ADUs.
HARDWARE DESCRIPTION SYSTEM 25 CABINET TN742 ANALOG LINE CP PART OF OCTOPUS CABLE EXPOSED CABLE PART OF SIP C2 SIP ADAPT.
HARDWARE DESCRIPTION SYSTEM 25 CABINET PART OF TAE 700A NETWORK INTERFACE BLOCK (110- OR 66-TYPE) PART OF OCTOPUS CABLE PART OF SIP TN742 ANALOG LINE CP C2 SIP ADAPT. W1 A NETWORK INTERFACE RJ21X OPS SINGLE-LINE VOICE TERMINAL CENTRAL OFFICE LEGEND: A - SINGLE-ENDED 25 PAIR CABLE (A25D)* C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P W1 - 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER Figure 4-29.
HARDWARE DESCRIPTION PART OF OCTOPUS CABLE SYSTEM 25 CABINET ZTN79 ATL LINE CP PART OF SIP SIP C2 ADAPT. W1 B1 C1 VOICE TERMINAL T1 LEGEND: B1 C1 C2 T1 W1 - TYPICAL-103A CONNECTING BLOCK* MODULAR CORD (D8W-87) - FURNISHED WITH SET OCTOPUS CABLE (WP90780) - PEC 2720-05P 7300H TYPE VOICE TERMINAL OR ATL CORDLESS TELEPHONE 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER NOTE: RANGE WITHIN 2000 FEET OF SYSTEM CABINET (LOCAL POWER REQUIRED BEYOND 1000 FEET). Figure 4-30.
HARDWARE DESCRIPTION SYSTEM 25 CABINET EXPOSED CABLE PART OF OCTOPUS CABLE ZTN79 ATL LINE CP PART OF SIP C2 SIP ADAPT.
HARDWARE DESCRIPTION SYSTEM 25 CABINET PART OF OCTOPUS CABLE TN735 MET LINE CP PART OF SIP C2 SIP ADAPT. W1 B1 400B2 ADAPT. C1/C9 MET SET C7 248B ADAPT. (NOTE) 2012D TRANS.
HARDWARE DESCRIPTION SYSTEM 25 CABINET ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE C2 PART OF SIP 451A Z400F ADAPT. ADAPT. C1 SIP ADAPT.
HARDWARE DESCRIPTION SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN78 OR TN742 PART OF SIP C2 Y ADAPT. (WP90851-L1) SIP ADAPT.
HARDWARE DESCRIPTION PART OF OCTOPUS CABLE SYSTEM 25 CABINET PART OF SIP C2 ZTN79 ATL LINE CP Y ADAPT (WP90851-L1) TN726 DATA LINE CP SIP ADAPT. W1 B1 C1 Z3A5 ADU C2 -48V DC P1 C1 C1 RS-232 TERMINAL LEGEND: WP90851-L1 B1 C1 C2 W1 Z3A5 ADU C1 P1 Figure 4-35.
HARDWARE DESCRIPTION SYSTEM 25 CABINET TN726 HOST COMPUTER OR TERMINALS LEGEND: TN726 - DATA LINE CP MADU - MULTIPLE ASYNCHRONOUS DATA UNIT (PEC 2169-005) SINGLE UNIT ASSEMBLY (8 ADU PORTS) W2 - BUILDING WIRING (25-PAIR CABLE) C10 - 25-PAIR CENTERFEED-TO-ENDFEED CABLE (PEC 2724-78B) (ALWAYS REQUIRED) C11 - M48C OCTOPUS CABLE (PEC 2724-29G) (7-FOOT CORD WITH EIGHT 6-INCH ARMS FOR “DTE” HOST INTERFACE C12 - M48G OCTOPUS CABLE (PEC 2724-98G) (7-FOOT CORD WITH EIGHT 6-INCH ARMS FOR “DCE” HOST INTERFACE Fig
HARDWARE DESCRIPTION D8AM-87 CROSSOVER CORD (REQUIRED IF THIS ADU IS CONNECTED TO ANOTHER ADU OR ANY OTHER DCE DEVICE, RATHER THAN DATA LINE CP) NOTE: PEC 21691 INCLUDES 2012D TRANSFORMER, 248B AND 400B2 ADAPTERS AND D6AP CORD. Figure 4-37.
TECHNICAL SPECIFICATIONS Hardware and Software Parameters 5-2 Unit Loads 5-6 Cable Distance Limitations 5-7 Call Progress Tones 5-10 Indicator Lamp Signals 5-11 Port Specifications 5-12 Recommended Central Office Trunk Facilities 5-19 Analog Transmission Characteristics 5-20 -i-
Figures Figure 5-1. Single-Line Voice Terminal Allowable Cable Distances 5-7 Figure 5-2. Multiline Voice Terminal Allowable Cable Distances 5-8 Figure 5-3.
TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS This section provides information on the technical characteristics and capacities of the system. Some items covered here are discussed elsewhere in the manual but are repeated here for ease of reference.
TECHNICAL SPECIFICATIONS Hardware and Software Parameters The following is a listing of maximums for hardware and software parameters.
TECHNICAL SPECIFICATIONS Hardware and Software Parameters (Contd) ITEM Emergency Transfer Units (ETUs) Voice Terminals per ETU Modem Pool Circuit Packs per cabinet Conversion Resources per circuit pack TOTAL 4 5 2 2 Paging Zones (Auxiliary CP) 3 Parked Calls (System) 24 Per Voice Terminal 1 Attendant Selector Console 8 Pickup Groups Members per group Trunk Groups 16 16 16 System Delay Announcements: Direct Group Calling Delay Announcement Directed Night Service Delay Announcement Account Code D
TECHNICAL SPECIFICATIONS Hardware and Software Parameters (Contd) ITEM TOTAL System Administration Terminal 1 Toll Call Allowed Lists Total Entries (all lists) 3 digits 164 Virtual Facilities 10 4 Traffic Data Simultaneous 2-Party Conversations ● Call Capacity — CCS/Hour — Busy Hour Call Capacity ● Reliability ● Mean Time Between Outages (MTBO) Power Consumption ● Per Cabinet, Maximum ● Thermal Dissipation Total Ports - also includes trunk and station ports [Software Limits; hardware maximum = 3
TECHNICAL SPECIFICATIONS Hardware and Software Parameters (Contd) ITEM TOTAL Trunks ● ● Trunk Ports — Tie Trunks Auxiliary Trunk Ports — Paging Access — Dictation Access Station Ports ● ● Data Ports Voice Ports — Single-Line Voice Terminals — Multiline Voice Terminals Attendant Consoles Selector Consoles 22- or 34-Button Sets (nonattendant) Non 22- or 34-Button Sets November 1995 104 104 3 8 240 104 200 200 144 2 2 96 142 5-5
TECHNICAL SPECIFICATIONS Unit Loads A cabinet can supply no more than 80 unit loads of 48 volt power (a unit load is defined as 44 mA). Unit loading is determined by the terminal connected to the port circuits. The following table lists unit loads for various terminals. UNIT LOADS (Note) EQUIPMENT CIRCUIT PACK UNIT LOAD PER PORT 2500 Voice Terminals ZTN78 0.5 7100 Voice Terminals TN742 1.0 MET Sets (10 Btn.) MET Set (12 Btn.) TN735 TN735 1.0 2.0 5-Btn. (7302H01D) 10-Btn. (7303H01D) ZTN79 1.
TECHNICAL SPECIFICATIONS Cable Distance Limitations This subsection provides allowable cabling distances for the following devices: ● Single-Line Voice Terminals (Figure 5-1) ● Multiline Voice Terminals (Figure 5-2) ● Data Terminals (RS-232) Connected to Asynchronous Data Units (ADUs) (Figure 5-3). Single-Line Voice Terminals SUPPORTING CIRCUIT PACK 24-GAUGE WIRE (0.
TECHNICAL SPECIFICATIONS Multiline Voice Terminals SUPPORTING CIRCUIT PACK 24-GAUGE WIRE (0.5106 mm) ZTN79 (7300H Series— in-building and ATL Cordless Telephone or out-of-building, no off-premises) TN735 (in-building MET Sets only) Note: FEET METERS 2,000 (Note) 610 1,000 305 Requires local power (PEC 62510) beyond 1,000 feet or whenever IROBS are used.
TECHNICAL SPECIFICATIONS Data Terminals (RS-232) Connected To Asynchronous Data Units DATA RATE 300 bps 1,200 bps 2,000 bps 4,800 bps 9600 bps 19,200 bps 24-GAUGE WIRE (0.5106 mm) FEET METERS 40,000 20,000 12,000 7,000 5,000 2,000 12,200 6,096 3,657 2,133 1,524 610 DISTANCE (SEE TABLE) RS-232C DEVICE (ASYNCHRONOUS) ADU ADU ZTN130 CALL PROCESSOR CP OR DISTANCE (SEE TABLE) RS-232C DEVICE (ASYNCHRONOUS) Figure 5-3.
TECHNICAL SPECIFICATIONS Call Progress Tones The following call progress tones are generated by the system: TONE 5-10 FREQUENCY PATTERN (In Milliseconds) Busy 480 Hz + 620 Hz 500 on, 500 off; repeated Call Waiting Notify 440 Hz 200 on; not repeated Confirmation 350 Hz + 440 Hz 100 on, 100 off, 100 on, 100 off, 100 on followed by silence Dequeuing 350 Hz + 440 Hz 100 on, 100 off, 100 on, 100 off, 100 on followed by silence Dial 350 Hz + 440 Hz Continuous Queuing 440 Hz Five 50 ms tones,
TECHNICAL SPECIFICATIONS Indicator Lamp Signals The following lamp signals are provided at multiline voice terminal and ATL cordless telephone line appearances: PATTERN (In Milliseconds) LAMP SIGNAL MEANING Dark Off Inactive Lighted On Active Flashing 500 on, 500 off; repeated Ringing Broken Fluttering 50 on, 50 off; repeated, (gated on/off every 500 ms) Transfer/Conference in progress Wink 350 on, 50 off; repeated Hold 5-11
TECHNICAL SPECIFICATIONS Port Specifications The following tables provide interface specifications for System 25 line and trunk port circuits: DATA TERMINAL PORTS (Note) STATION TYPE EIA RS-232 Device Via ADU Note: 5-12 CIRCUIT PACK Data Line (TN726) DATA TERMINAL SPECIFICATIONS RS-232 device must furnish signals on ADU pins 2 (TD) and 20 (DTR) and ground on either pin 1 or 7. The ADU furnishes signals on pins 3 (RD) and 8 (CD). The CD signal is also tied to pins 5 (CTS) and 6 (DSR).
TECHNICAL SPECIFICATIONS Port Specifications (Contd) DATA TERMINALS (Do Not Require Local Power) DATA TERMINAL REQUIRES Z3A1 or Z3A2 ADU AT&T 4410 4415 510A X X X ADMs 3A 31 X X ADDS Viewpoint * X ConCept HDS 108 X Datamedia Elite 1521 X Hazeltine 1510 X Hewlett Packard 2621A 2623A 2640 2645 2645A Teletype BLIT/1 (68000 based) 5620 (MAC-80 based) 5420 REQUIRES Z3A4 ADU X X X X X X X X * Requires Originate/Disconnect Switch.
TECHNICAL SPECIFICATIONS Port Specifications (Contd) VOICE TERMINAL PORTS STATION TYPE Tip and Ring Single-Line Sets (Analog) SPECIFICATIONS CIRCUIT PACK Tip Ring Line (ZTN78) ● 1-Pair Interface (Tip and Ring) ● Analog signals modulated over DC loop ● Loop Voltage: 24 V dc ● Tip and Ring Single-Line Sets (Analog) Analog Line (TN742) (TN746B) Signaling: Dual Tone Multifrequency (DTMF) or Dial Pulse ● REN (max.): 1.2 ● DC Current (max.
TECHNICAL SPECIFICATIONS Port Specifications (Contd) VOICE TERMINAL PORTS (Contd) STATION TYPE MET Sets (Hybrid) CIRCUIT PACK MET Line (TN735) SPECIFICATIONS ● ● Analog Voice, Digital Control/Signaling ● Power: Phantom Power Over Data Pairs ● Bipolar Signaling With 0 V dc Offset ● 1 MHz Nominal Signaling Rate ● MERLIN® System Sets 7300H Series) Hybrid) ATL Line (ZTN79) (TN762B) 3-Pair Interface 1-Voice pair 2-Control pairs ● Loop Range: 1000 feet (In-Building service only) 3-Pair Interfac
TECHNICAL SPECIFICATIONS Port Specifications (Contd) VOICE TERMINAL PORTS (Contd) STATION TYPE ATL Cordless Telephone SPECIFICATIONS CIRCUIT PACK ATL Line (ZTN79) Handset to Base 1000 feet clear area Base station: ● 3-pair Interface 1-Voice pair 1-Control pair 1-Power pair ● Analog Voice, Digital Control/Signaling ● Bipolar non-return to zero line-coding ● 40 kHz Nominal signaling rate ● Loop Range: 2000 feet ● 5-16 In-Building and In-Range Out-of-Building (IROB) services only (Local power
TECHNICAL SPECIFICATIONS Port Specifications (Contd) TRUNK PORTS TRUNK TYPE Auxiliary Trunk SPECIFICATIONS CIRCUIT PACK TN763 ● ● Direct Inward Dialing (DID) Trunk ● ● Capacity: 8 Circuits 2-wire (600 Ohm Fixed Impedance) Transmission Signaling: Wink Start, Delay Dial, or Immediate Dial.
TECHNICAL SPECIFICATIONS Port Specifications (Contd) TRUNK PORTS TRUNK TYPE DS1 Interface SPECIFICATIONS CIRCUIT PACK TN767 ● Capacity: 24 Circuits ● 4-Wire Transmission ● Ground Start Trunk ZTN76 ● ● Loop Start Trunk Capacity: 8 Circuits 2-wire (600 Ohms or RC Balance) Transmission ● Network Signaling: Ground Start ● Two-way or Incoming-only Service ● Capacity: 8 Circuits ZTN77 ● 5-18 3-pair Interface: Transmit Receive Loopback 2-wire (600 Ohms or RC Balance) Transmission ● Network
TECHNICAL SPECIFICATIONS Recommended Central Office Trunk Facilities The following table provides recommendations for CO trunks based on the number of voice terminals in the system and the calling traffic.
TECHNICAL SPECIFICATIONS Analog Transmission Characteristics Frequency Response: (Station-To-Station or Station-To-CO Trunk, relative to loss at 1 kHz) FREQUENCY 60 200 300-3000 3200 3400 Hz Hz Hz Hz Hz LOSS >20 dB <5 dB <1 dB <1.
TECHNICAL SPECIFICATIONS Analog Transmission Characteristics (Contd) Quantization Distortion: SIGNAL LEVEL +2 to -30 dBm0 -40 dBm0 -45 dBm0 DISTORTION LEVEL 35 dB 29 dB 25 dB Sampling Rate: 8 kHz Terminating Impedance: 600 ohms Trunk Balance Impedance: 600 ohms or Complex Z (selectable) Echo Return Loss: The echo return loss of the switching equipment is infinite. The echo return loss of the station equipment can be engineered for greater than 18 dB over the range of 500 Hz to 2500 Hz.
TECHNICAL SPECIFICATIONS Analog Transmission Characteristics (Contd) Single Frequency Return Loss (Talking State): Station to station—exceeds 12 dB Station to 4-wire trunk connection—exceeds 14 dB Station to 2-wire trunk connection—exceeds 12 dB Peak Noise Level: Analog to analog—20 dBrnc Analog to digital—19 dBrnc Digital to analog—13 dBrnc 5-22
ENVIRONMENTAL REQUIREMENTS Floor Plans And Layouts 6-1 Table Top Space 6-4 Wall Space Requirements 6-4 Temperature and Humidity 6-4 Air Purity 6-5 Lighting 6-5 Electrical Noise/Radio-Frequency Interference (RFI) 6-5 Environmental Considerations for ATL Cordless Telephone Set 6-6 AC Power Requirements 6-8 Grounding 6-10 Lightning Protection 6-10 -i-
Figures Figure 6-1. Typical System 25 Equipment Area Floor Plan 6-2 Figure 6-2. Typical System 25 Equipment Area Elevation Plan 6-3 Figure 6-3.
ENVIRONMENTAL REQUIREMENTS ENVIRONMENTAL REQUIREMENTS This section provides information on floor and wall space requirements for System 25 cabinets and associated peripheral equipment. Also included are specifications for temperature, humidity, air purity, lighting, electrical noise (RFI) suppression, power, grounding, and lightning protection. Floor Plans And Layouts Floor plan arrangements will vary depending on the available equipment area and anticipated system growth.
ENVIRONMENTAL REQUIREMENTS BACKBOARD TERMINATION FIELD (NOTE 4) SYSTEM CABINETS (FOOTPRINT) FRONT TABLE NOTE 3 NOTES: 1. 115V AC, 60 Hz, 15 AMP OUTLETS (HUBBELL 5262 OR EQUIVALENT) MUST BE LOCATED WITHIN SIX FEET (1.8m) OF SYSTEM CABINETS. 2. MULTIPLE CABINET SYSTEMS REQUIRE TWO QUAD OUTLETS, SINGLE CABINET SYSTEMS REQUIRE ONE QUAD OUTLET. 3. ALLOW AT LEAST 24 INCHES OF SPACE IN FRONT OF CABINETS. TABLE MUST BE ABLE TO SUPPORT 250 POUNDS. 4.
ENVIRONMENTAL REQUIREMENTS Figure 6-2.
ENVIRONMENTAL REQUIREMENTS Table Top Space The following system equipment requires (customer provided) table top space in the equipment area: ● System Cabinets: Each cabinet is 13 inches high, 17 inches wide, and 21 inches deep. A 3-cabinet system requires a vertical space of approximately 40 inches and a 17-inch by 21-inch table top space. Each cabinet weighs approximately 75 pounds. Place the cabinets on a desk or table top that is about 18 inches high and capable of supporting at least 250 pounds.
ENVIRONMENTAL REQUIREMENTS Air Purity The cabinet should not be installed in an area where the air may be contaminated with any of the following: lint, carbon particles, ● Excessive dust, contaminants ● Contaminants expelled by office copying machines ● Highly corrosive atmosphere within an enclosed area or atmosphere containing vaporized chemical compounds that may condense on the equipment ● Explosive or flammable atmosphere.
ENVIRONMENTAL REQUIREMENTS Environmental Considerations for ATL Cordless Telephone Set The ATL Cordless telephone set uses standard radio transmission technology to pass communications between the handset and the base. This radio transmission is susceptible to Radio Frequency Interference as explained on the previous page. The ATL Cordless Telephone performs best when it is operated in an area free of the following devices and materials: ● ● Metals (including steel, aluminum, etc.
ENVIRONMENTAL REQUIREMENTS The base should be located at least; three feet away from any metal object (such as metal window frames), six feet away from any computing equipment, and six feet (20 feet for minimum interference) away from electromagnetic sources. Avoid using the handset in areas with metal objects in the line of sight between the handset and the base. If RFI is experienced while using the set, moving the base to a different location can significantly increase the range.
ENVIRONMENTAL REQUIREMENTS AC Power Requirements Each System 25 cabinet requires 500 Watts at 115V ac (maximum). The System 25 power service must be a dedicated branch circuit with no other equipment served (see Figure 6-3). The customer should provide a load center of appropriate current rating (ITE EQ4 typical) equipped with 120V ac, 15 ampere (AMP), single pole magnetic circuit breaker(s) (ITE QP1-BO15 typical).
ENVIRONMENTAL REQUIREMENTS Figure 6-3.
ENVIRONMENTAL REQUIREMENTS Grounding Connection of an approved ground to the system cabinets is essential. An approved ground may consist of any of the following: ● Grounded Building Steel —The metal frame of the building. ● Water Pipe— A continuous metal water pipe, not less than 1/2 inch diameter, that is connected to an underground metal water pipe that is in direct contact with earth for 10 feet or more.
ENVIRONMENTAL REQUIREMENTS ● Surge protection on the AC power to System 25 and associated equipment (SAT, SMDR, DTU, etc.) provided by the TII 428 Unit. The protection outlined above is adequate for more than 99 percent of all lightning strikes. For the few remaining cases, external secondary protection, located at the trunk access area of the cross-connect field, can be employed. Several commercially available units can be used.
PARTS INFORMATION Parts Listed by PEC Parts Listed by COMMODE 7-1 7-9 -i-
PARTS INFORMATION PARTS INFORMATION This section contains information that may assist you in cross-referencing Apparatus Codes Component Codes (COMCODEs) and Price Element Codes (PECs). The first table is grouped by descriptive PEC. The second table is arranged by COMCODE.
PARTS INFORMATION PEC DESCRIPTION APPARATUS CODE COMCODE 62507 Digital Tape Unit TS-555A 404079436 62508 System Administration Terminal (SAT) TI-703 404079428 62509 Direct Extension Selector Console 23A1-003 e/W 103969424 Mod Cord Mod Cord (14 ft) Power Supply Adapter D6AP-87 D8W-87 KS-22911 L1 400B 102937620 103786802 403242639 103848859 MERLIN ® 9 Sys.
PARTS INFORMATION PEC DESCRIPTION APPARATUS CODE COMCODE 62514 Emergency Transfer Unit 10B ETU 103984118 Cables (2) (15 ft DE) Mod Cord (7 ft) B25A D8W-87 100017334 103786786 Peripheral Interface for OnPremises Direct or Switched Connection D-181558 Adapter Adapter Adapter Mod Cord ADU Crossover Cord Mod cords (2) (7 ft) EIA Crossover Cord ADU Transformer 248B 355AF 400B2 D6AP-87 D8AM-87 D8W-87 M7U-87 Z3A4 2012D 102802113 105012645 104152558 102937620 104154430 103786786 104246616 103964185
PARTS INFORMATION APPARATUS CODE COMCODE CPU/MEM CP ZTN142 107057754 -- Service Circuit CP ZTN131 105275671 63111 Analog Line CP TN742 103556957 63112 MET Line CP TN735 103556882 63113 Hybrid Line CP TN762B 103976171 63115 CO Trunk CP TN747B 105167266 63116 DID Trunk CP TN753 103557062 63118 Aux Trunk CP TN763D 10605616 63119 Pooled Modem CP TN758 103557112 63123 Tone Detector CP TN748D 106502552 63130 Data Line CP TN726 103556791 63136 Analog Line CP TN746B
PARTS INFORMATION PEC DESCRIPTION 2403-004 Uninterruptible Power Supply * (UPS) * 2610-001 STARLAN NETWORK Network Extension Unit (NEU) 527840003 2614100 STARLAN NETWORK Network Access Unit (NAU) 527840102 2720-05P 25-pair/8-plug 15-ft Cable (Octopus Cable) WP90780 L1 405010612 2720-05X Splitter Cable, Tie-Trunk WP90929 L3 403864150 2720-06X Splitter Cable, CO Trunk WP90929 L1 403836620 Adapter Cable (TN746 Analog Line) 853B 104305834 2724-29G MADU Interface Cord M48C 104109285
PARTS INFORMATION PEC DESCRIPTION APPARATUS CODE COMCODE 2781-004 System Wiring-Hourly Rate 2782-004 System Wiring-Flat Rate * * * * 2783-004 (New) System Wiring Run, Firm Quote * * 2788-004 System Wiring-Aftermarket, Flat Rate * * 2789-004 System Wiring-Aftermarket, Hourly Rate * * 3100-1TD Basic TT Desk Tel 2500MMGB * 3100-TRC Basic TT Desk Tel with Recall Button 2500MMGT * 3100-TWR Basic TT Wall Tel 2554BM 103234472 3100-2TD Basic TT Desk Tel (4A Speakerphone Compatibl
PARTS INFORMATION PEC DESCRIPTION APPARATUS CODE 3160-111 (MAC30 Att) 5-Button MERLIN Sys. VT Z7302H01D-003 * 3161-172 (MAC30 Att) 10-Button MERLIN Sys. VT Z7303H01D-003 * 3161-161 MERLIN Sys. HFAI VT Z7309H01B-003 103982005 3162-412 34-But MERLIN Sys. VT Z7305H01D-003 103842050 3162-417 (MAC30 Att) 34-But Dlx MERLIN Sys. VT Z7305H02D-003 103843538 3162-BIS MERLIN Sys. BIS VT Z7305H03B-003 103981965 3162-DIS MERLIN Sys.
PARTS INFORMATION PEC DESCRIPTION APPARATUS CODE COMCODE 31019 External Alert 31021 Ground Start Key KS 23566,L1 31032 Message Waiting Indicator Adjunct Z3A * CMS Voice Announcement Unit * 405745811 * * 405792839 * Modular Bulk Power Supply (includes) 31760 Power Unit 346A 104174768 31761 Power Panel 346A-1 104174750 32918 IROB Unit TII Model 341 403865785 8310-001 AC Power Surge Suppressor TII Model 428 402988950 * Not Available.
PARTS INFORMATION Parts Listed by COMCODE Throughout the following table, “part of” is abbreviated as “P/O.
PARTS INFORMATION DESCRIPTlON APPARATUS CODE 103557112 63119 Pooled Modem CP TN758 103557161 63118 Aux Trunk CP TN763 103557203 63166 DS1 Interface CP TN767 103558916 P/O 62513 Voice Coupler 36A 103756334 No PEC Connecting Block, Female 110 103786786 2925-07G P/O 62514 P/O 62515 Mod Cord (7 ft) D8W-87 103786802 2725-075 P/O 62506 P/O 62509 Mod Cord (14 ft) D8W-87 103786828 2725-075 Mod Cord (25 ft) D8W-87 103814356 3163-HFU MERLIN Sys.
PARTS INFORMATION COMCODE PEC DESCRIPTION APPARATUS CODE 103871109 3170-00M Single-Line VT with Message Lamp & Recall Button 7101A01A-003 103871844 P/O 62512 Adapter 278A 103881421 2750-A17 MET Adapter Cord ZD8AJ 103942146 3141-BIS 10-Button MET Set-BIS 2993C04 103942857 P/O 62510 Adapter Z400F 103963310 3143-12M 12-Button MET Set Z7203M01A-003 103963963 2169-001 Tip Ring ADU Z3A1 103964185 2169-004 P/O 62515 Tip Ring ADU Z3A4 103965232 62502 GS Trunk CP ZTN76 103965
PARTS INFORMATION COMCODE PEC DESCRIPTION APPARATUS CODE 103976171 63113 Hybrid Line CP TN762B 103981965 3162-BIS MERLIN Sys. BIS VT Z7305H03B-003 103981981 3162-DIS MERLIN Sys. Display VT Z7305H04C-003 103982005 3161-161 MERLIN SYS.
PARTS INFORMATION COMCODE PEC DESCRIPTION APPARATUS CODE 105167266 63115 CO Trunk CP TN747B 105196604 No PEC Fanning Strip 50A 105243810 P/O 62525A Documentation & Tapes for System 25 Upgrade 555-540-013 105336952 3167-34B 34-But MERLIN Sys. BIS VT (Black) Z7316H01A-003 105336960 3166-22B 22-But MERLIN Sys. BIS VT (Black) Z7314H01A-003 105336978 3165-10B 10-But MERLIN Sys.
PARTS INFORMATION COMCODE PEC DESCRIPTION APPARATUS CODE 403242639 P/O 62509 P/O 62510 P/O 62512 P/O 62520 Power Supply KS-22911 L1 403836620 2720-06X Splitter Cable, CO Trunk WP90929 L1 403864150 2720-05X Splitter Cable, Tie-Trunk WP90929 L3 403957129 P/O 6250-031 P/O 62501 Air Fitter 21985-1 403961519 P/O 62501 TDM Bus Cable J58901A1 L3 404079428 62508 System Admin Terminal (SAT) TI-703 404079436 62507 Digital Tape Unit TS-555A 405010612 2720-05P 25-pair/8-plug, 15-ft Ca
PARTS INFORMATION COMCODE PEC DESCRIPTION 527840102 AT&T STARLAN NETWORK Network Access Unit (NAU) 2614-100 845412956 No PEC CPU/MEM Interconnect Cable APPARATUS CODE * 845416379 P/O 6250-031 Fans (2) P/O 62501 WP90677 L1 845416635 P/O 6250-031 Address Plug P/O 62501 * 845875772 P/O 6250-031 SLAC Graphics P/O 62525A Overlays (2) * * Not Available.
REFERENCE DOCUMENTATION Basic Manuals 8-1 Software Packages 8-1 Integrated Solution Documents 8-2 Descriptions of Basic Manuals 8-2 -i-
REFERENCE DOCUMENTATION REFERENCE DOCUMENTATION System 25 is supported by a complete set of basic and supplementary documentation and optional software. This section provides a brief summary of the available material for Release 3 (R3).
REFERENCE DOCUMENTATION Integrated Solution Documents Integrated Integrated ● Integrated ● AT&T Call ● ● Solution User Guide Solution Instructor’s Guide Solution Student Guide Accounting System Reports Guide 555-540-715 555-540-717 555-540-718 775-413 Descriptions of Basic Manuals An Introduction to System 25 Provides a summary of System 25 features, services, and equipment in an attractive fullcolor format with many pictures.
REFERENCE DOCUMENTATION Reference Manual The principal technical reference for users of System 25. It provides reference material for sales support, system configuration and operation and for the system technician. It contains a comprehensive description of the system, emphasizing features, components and overall capabilities and capacities. Terminal Operations Manual Designed to help the System Administrator better understand System 25 voice terminal and data terminal operation.
GLOSSARY GLOSSARY This section provides explanations for acronyms and definitions of terms used in this manual. ADU: (Asynchronous Data Unit) ARS: (Automatic Route Selection) ASCII: (American Standard Code for Information Exchange) Administer To access and change the parameters associated with the services or features of the system. Analog Data Endpoint Data endpoints with customer provided built-in or stand-alone modems.
GLOSSARY Attendant The operator of the attendant console. Attendant Console ● Direct Trunk or Switched Loop Attendant Console: An electronic callhandling position with pushbutton control. Used by attendants to answer and place calls and to manage and monitor some system operations. ● Direct Extension Selector Console: Provides the attendant with a visual indication of the active or idle status of extension numbers assigned in the system.
GLOSSARY Bridge (Bridging) The sharing of the same extension or line by two or more voice terminals. Buffer A circuit or component that isolates one electrical circuit from another. Typically, a buffer holds data from one circuit or process until another circuit or process is ready to accept the data. Bus A multi-conductor electrical path used to transfer information over a common connection from any of several sources to any of several destinations.
GLOSSARY Central Office Trunk A telecommunications channel that provides access from the system to the public network through the local central office. Channel A communications path for transmitting voice and data. Class of Service (COS) Parameters used to define voice terminal, data, Remote Access, and trunk port capabilities and restrictions.
GLOSSARY Covering User The person at an alternate answering position who answers a redirected call (the coverage receiver). D4 Framing D4 is the most prevalent framing format found in the T1 environment and is supported by the D4 series channel banks.
GLOSSARY Data Endpoint Two general groups: those having a DTE-type interface, which encompasses almost all of the data terminal devices; and the group of DCE interface devices which are primarily modems. However, it must be noted that within each category, control interfaces may also vary. Refer to Analog Data Endpoint and Digital Data Endpoints for additional information. Data Module A data interface device (i.e.
GLOSSARY Equalization The DS1 signal is shaped so that when it reaches the cable-end it conforms to the DSX-1 interface power specification. Erlang A traffic measuring unit that expresses the load of one or more traffic-handling devices [36 CCS equals 1 erlang - see CCS (Hundred Call Seconds)]. Extension Number One- through four-digit number assigned to each voice terminal and data end point in the system.
GLOSSARY Foreign Exchange (FX) A central office other than the one providing local access to the public telephone network. Foreign Exchange Trunk A telecommunications channel that directly connects the system to a central office other than its local central office. Foreign Numbering Plan Area Code (FNPA) An area code other than the local area code; also known as the “other area code.” The foreign area code must be dialed to call outside the local geographical area.
GLOSSARY Immediate-Start Tie Trunk After establishing a connection with the distant switching system for an outgoing call, the system waits a nominal 65 milliseconds before sending the digits of the called number. This allows time for the distant system to prepare to receive the digits. Similarly, on an incoming call, the system has less than 65 milliseconds to prepare to receive the digits. Inside Call A connection between two parties within the system.
GLOSSARY Loop Start Trunk After establishing a connection with the distant switching system for an outgoing call, System 25 waits for a short period of time before sending the digits of the called number. On incoming calls, the received request for service is sufficient to cause the call to route to a predetermined destination, normally the system attendant group. No digits are received. MET: (Multibutton Electronic Telephone) Misframe Frame in which framing bits where observed to be in error.
GLOSSARY Off-Premises Station (OPS) An arrangement provided by the local telephone company which permits remote Terminal Equipment to operate as though it was directly connected to the System 25. This tariffed service can only be provided for FCC registered single-line voice terminals. Ones Density In synchronous communications systems where clocking is embedded in the data stream, a required number of signal transitions must occur in order to accurately recreate the clock at the far end.
GLOSSARY Personal Dial Code Each system user is assigned a PDC and is allowed to “sign in” the PDC at any voice terminal in the system as he or she moves about the premises. The PDC may be a 1-, 2-, 3-, or 4-digit number. There are two types of PDCs: ● PDCs assigned to voice terminals - Associated with each voice terminal in the system. ● Floating PDCs (FPDCs) - Assigned to visitors and those users who do not have exclusive use of a voice terminal.
GLOSSARY Public Network The network that can be openly accessed by all customers for local or long-distance calling. Queue An ordered sequence of calls waiting to be processed. Queuing The process of holding calls in order of their arrival to await connection to an attendant, to an answering group, to a station, or to a trunk. Calls are automatically connected in first-in, first-out sequence.
GLOSSARY SAT: (System Administration Terminal) SIP: (Station Interconnect Panel) SLAC: (Switched Loop Attendant Console) SMDR: (Station Message Detail Recording) Selector Console: (Direct Extension Selector Console) Signaling Signaling is the process of communicating channel state information for end-point to end-point. Single-Line Voice Terminal Voice terminal served by a single-line tip and ring circuit (2500 series and 7101A voice terminals or industry standard Dual Tone Multifrequency equivalent).
GLOSSARY Switch The software-controlled communications processor complex that interprets dialing pulses/tones/key board characters and makes the proper interconnections both within the system and external to the system. The switch itself consists of a digital computer, software, storage device (memory), and associated circuit packs and special hardware necessary to perform the actual connections. Switchhook The button(s) on a voice terminal located under the handset.
GLOSSARY Tone Ringer A device with a speaker, used in electronic voice terminals to alert the user. Translations Specific information assigned to a terminal or to the system and customized for the user. Trunk A telecommunications channel between two switching systems. Trunk Group Telecommunications channels assigned as a group for certain functions. Trunk Port The hardware providing the access point to the system switching network for each circuit associated with a trunk.
GLOSSARY Wide Area Telecommunications Service (WATS) A service that allows calls to a certain area or areas for a flat-rate charge based on usage. Wink-Start Tie Trunk After establishing a connection with a distant switching system for an outgoing call, the system waits for a momentary signal (wink) before sending the digits of the called number. Similarly, on an incoming call, the system sends the wink signal when ready to receive digits.
INDEX INDEX 10-Button MET Set (2991 C/D05) 4-46 10-Button MET Set With BIS (2993C04) 4-48 12-Button MET Set (7203M) 4-50 2012D Transformer 4-56 2500 Series Voice Terminals 4-16 2526BMWG Voice Terminal 4-19 346 Modular Bulk Power Supply 4-61 420 Speakerphone Voice Terminal 4-21 4A Speakerphone 2-285, 4-18, 4-55 500 Series Voice Terminals 4-16 500A Headset Adapter 2-194, 4-55 502B Headset Adapter 2-194, 4-55 617A Panel 4-64, 4-65 7101A Voice Terminal 4-20 7302H01D Voice Terminal (5-Button) 4-24 7303H01D Voic
INDEX Attendant (Continued) Call Extending 2-14 Call Waiting 2-16 Camp-On 2-16 Cancel 2-18 Console, Connections 4-67 Console, Direct Trunk 2-19 Console, Switched Loop 2-24 Consoles 4-56 Direct Extension Selection (DXS) 2-34 Direct Extension Selector Console 2-34 DXS Console Connections 2-38 Features Table 2-7 Forced Release 2-39 Join 2-40 Message Waiting 2-41, 2-227 Position Busy 2-43 Release 2-46 Return Coverage On Busy 2-48 Return Coverage On Don’t Answer 2-50 Source and Destination 2-52 Splitting One-Wa
INDEX Circuit Packs (Continued) Optional 4-9 Pooled Modem (TN758) 3-35, 4-12 Required 4-8 Service Circuit (ZTN131) 3-31, 4-8 STARLAN Interface (ZTN84) 2-295, 3-26, 4-10 Station Port 4-9 Summary, System 4-7 System Resource 4-12 Tie Trunk (TN760B) 3-27, 4-11 Tip Ring Line (ZTN78) 3-30, 4-9 Tone Detector (TN748B) 3-34, 4-12 Tone Detector (TN748C) 4-12 Trunk Port 4-11 Circuitry Common to All Port CPs 3-9 Clock 2-220 CMS 2-91 Code, Personal Dial 2-252 COMCODEs 7-9 Command Mode 2-97 Menu Tree 2-351 Common Circui
INDEX Data Port Endpoints, Option Profiles 2-100 DCE Devices 2-131 Delay Announcement Direct Group Calling 2-150 Equipment Connections 2-151, 2-241 Night Service 2-240 Delayed Access 2-233 Dequeuing Tone 2-94 Display (Continued) Standard Call 2-164 Distinctive Ringing 2-171 Documentation, Reference 8-1 Don’t Answer, Attendant Return Coverage on 2-50 Drop, Conference 2-106 DS1 Facility Interface 2-117 DS1 Format 2-117 Description, System 1-1 DS1 Interface Trunk (TN767) 3-37 Destination, Attendant Source
INDEX Features (Continued) Attendant Camp-On 2-16 Attendant Cancel 2-18 Attendant Console, Direct Trunk 2-19 Attendant Direct Extension Selection 2-34 Attendant Forced Release 2-39 Attendant Join 2-40 Attendant Message Waiting 2-41 Attendant Position Busy 2-43 Attendant Release 2-46 Attendant Return Coverage On Busy 2-48 Attendant Return Coverage On Don‘t Answer 2-50 Attendant Source and Destinatlon 2-52 Attendant Splitting One-Way Automatic 2-53 Attendant System Alarm Indication 2-54 Automatic Intercom 2-
INDEX Features Table (Continued) Station 2-4 System 2-3 Flex DSS 2-158 Floor Plans And Layouts 6-1 Following 2-182 Forced Account Code Entry 2-8 Release, Attendant 2-39 Forwarding 2-185 FPDC, Calls Placed to 2-183 Inspection 2-201 Integrated Solution 1-3, 2-204 Interactions, Call Origination 2-31 Intercept Treatment With Reorder Tone 2-207 Intercom Automatic 2-55 Hands-Free Answer On 2-191 Interdigit Timeouts 2-208 Interface DS1 (TN767) 4-11 Interface, DS1 Facility 2-117 I-Use Indication 2-218 G Glossary
INDEX Manuals (Continued) Administration 8-2 Implementation 8-2 Installation And Maintenance 8-2 Introduction to System 25 8-2 Reference 8-3 Terminal Operations 8-3 User Guides (700 Series) 8-3 Memory Allocation 3-39 Message Center-Like Operation 2-225 Message Drop Service 2-361 Message Waiting Attendant 2-41 Indicator 4-55 Indicators, Dial Access to 2-139 Station-to-Station 2-317 Messaging Services 2-227 Attendant Message Waiting 2-227 Coverage Message Waiting 2-227 Dial Access to Message Waiting Indicato
INDEX Position Busy (Continued) SLAC 2-28 Power Equipment, Optional 4-61 Failure Transfer (PFT) 2-262 Requirements, AC 6-8 Supply, 4-61 Supply, KS-22911 4-56 Supply, Uninterruptible 4-61 Unit, 85B1 4-56 Preference Prime Line 2-215 Ringing Line 2-215 Preindication, Data Call 2-345 Preselection 2-216 Price Element Codes (PECs) 7-1 Prime Line Preference 2-215 Principal Station 2-67 Priority Ringing 2-171 Program 2-267 Programmable Feature Buttons 2-26 Protection Requirements, Lightning 6-10 Q Queuing, Callba
INDEX SAT (Continued) On-Premises Switched Connections 2-325 Selection Direct Station 2-158 Line 2-215 Selector Console 2-34 Send All Calls 2-281 Service Clrcuit (ZTN131) 3-31, 4-8 Service, Night 2-237 Services 2-1 Messaging 2-227 Tie Trunks 2-337 Touch-Tone And Dial Pulse 2-340 Setup, Data Call 2-128 Signaling End-To-End 2-172 Manual 2-223 Signals, Indicator Lamp 5-11 Single-Line Voice Terminal Connections 4-68 — 4-70 Smgle-Line Voice Terminals 4-16 Cable Distance Limitations 5-7 Connection Information 4-
INDEX System (Continued) Block Diagram 1-2 Cabinets (J58901A1 L4) 4-1 Call Handling Capabilities 1-4 Description 1-1 Environmental Requirements 6-1 Equipment Configuration 1-2 Errors And Alarms 2-328 Features 2-1 Features Table 2-3 Floor Plans And Layouts 6-1 Functional Description 3-1, 3-37 Grounding Requirements 6-10 Lighting Requirements 6-5 Lightning Protection Requirements 6-10 Maintenance 2-328 Overview 1-1 Parts Information 7-1 Port Circuits 3-9 Resources 3-31 Safety 1-4 Services 2-7 Software 3-38 T
INDEX Voice Message System 2-204, 2-361 Voice Terminal 2500 Series Adjuncts 4-18 Adjunct Connection Information 4-55 Adjunct Power Supplies 4-56 Adjuncts 4-55 Connections 4-67 LED Indications 2-218 Multiline Cable Distance Limitations 5-8 Multiline Connections 4-54 Single-Line Cable Distance Limitations 5-7 Single-Line Connections 4-22 With Speakerphone or Headset Adjunct 2-192 Voice Terminals 4-14 10-Button MET Set (2991C/D05) 4-46 10-Button MET Set With BIS (2993C04) 4-48 12-Button MET Set (7203M) 4-50 2
