555-520-200 Issue 1, June 1987 AT&T System 25 Reference Manual
© 1987 AT&T All Rights Reserved Printed in USA TO ORDER COPIES OF THIS DOCUMENT REFER TO DOCUMENT NUMBER 555-520-200. Contact: Your AT&T sales representative or Call: 800-432-6600, Monday to Friday between 7:30 am and 6:00 EST, or Write: AT&T Customer Information Center 2855 North Franklin Road P.O. Box 19901 Indianapolis, Indiana 46219 Every effort was made to ensure that the information in this document was complete and accurate at the time of printing. However, information is subject to change.
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.
RIGHTS OF THE TELEPHONE COMPANY If your telephone equipment causes harm to the telephone network, the telephone company may discontinue your service temporarily. If possible, they will notify you in advance. But if advance notice isn’t practical, you will be notified as soon as possible. You will be informed of your right to file a complaint with the FCC.
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.
CONTENTS SECTION l—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
SECTION 1—OVERVIEW 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 replaces AT&T System 25 Reference Manual (555-50-200, Issue 1), which covered Release 1 Version 1 (RIV1 ) of System 25.
System 25 Description System 25 (Figure l-l) is an advanced digital switching system that integrates voice and data communications. It not only provides the features of a state-of-the-art PBX, but goes a step further by allowing data to be switched point-to-point without first being converted to analog format. This capability can be used to set up connections between data terminals, word processors, personal computers, and host computers.
DIGITAL SWITCH RS-232C SYSTEM ADMINISTRATION TERMINAL OR ADVANCED ADMINISTRATION PC TERMINAL RS-232C EMERGENCY -48V DC TRANSFER UNIT TAPE BACKUP UNIT COMMON CONTROL COMPLEX SMDR OUTPUT DEVICE RS-232C SINGLE-LINE VOICE TERMINALS ANALOG MULTILINE VOICE TERMINALS HYBRID DIRECT TRUNK ATTENDANT CONSOLE OR SWITCHED LOOP ATTENDANT CONSOLE ATTENDANT DIRECT EXTENSION SELECTOR CONSOLE STARLAN NETWORK WORKSTATIONS STARLAN NETWORK PRINT & FILE SERVICES STARLAN NETWORK HOSTS TRUNK FACILITIES DID l FX, WATS (L
Call Handling Capabilities System 25 can be arranged as a stand-alone system or can be part of a private network.
Incoming Business Communications Successful call termination is the key to capturing all incoming communications associated with revenue issues, client inquiries, decision data, etc. Call termination involves identifying the called party and routing the call to a primary or secondary answering position. System 25 provides powerful tools for both call screening and call termination.
supported by secretarial service and equipped with economical single-line phones. When alternate resources are not available to handle an incoming call, System 25 provides for attendant handling of the call utilizing camp-on, redirection and/or message service. ● ● ● Camp-On allows the attendant to extend an outside call to a busy station. A burst of tone is heard at the called station to notify the user of the camped-on call. The caller is placed on hold and hears music-on-hold, if available.
Ease of access to multiple types of network facilities (provided for minimum cost) is managed by: ● ● ● ● ● ● ● ● Automatic Route Selection (ARS) allows the customer to dial a standard DDD number. ARS selects the preferred route and does any number conversions required for the facilities selected. System 25’s Virtual Facility feature provides convenient and inexpensive access to OCCs.
● ● Automatic Intercom allows multiline voice terminal users to call each other by use of a dedicated line appearance. A private dedicated path ensures that a path is always available. This feature is frequently used in Boss/Secretary arrangements. The Dial Plan for System 25 is based on the concept that, whenever possible, calls should be placed to individuals rather than to pieces of equipment.
● ● ● Circuit switched data communications up to 19,200 bps (RS232 interface). This provides 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 four-pair wiring plan.
● ● ● ● ● Terminal Dialing provides the user with fast access to data communications via keyboard dialing at a terminal or PC. Command Mode provides a menu of data services supporting terminal dialing, and display and control of user data port options. A user friendly Change Options menu is provided for user administration of data options. Expert Mode is an enhancement that provides an alternative method of accessing Command Mode functions.
Figures 1 and 2.) Every circuit slot in the system can be used for trunk cards or voice/data station cards. All these attributes allow the client to add future capability without breakage and re-engineering of existing equipment. Thus, the client is able to minimize initial investment while not restricting future growth. Over time, the type of tools and facilities that a business utilizes changes.
Types of trunks which can be assigned in System 25 are: ● ● ● ● ● Central Office, which provide a link with the local telco for incoming and outgoing calls (LS/GS) Foreign Exchange (FX), which connect to a CO other than the local CO for high volume calling from a distant location Wide-Area Telecommunications Service (WATS), which connect to an Outward WATS office or a dial “800” Service Office Direct Inward Dial (DID), which provide incoming service from a CO to directly access a station or facility (S
USER CHANGEABLE VIRTUAL OPTIONS FACILITIES (V2) (V2) . . . . . . . . . . . . . . . . . . . . . ● . ● . . . . ● ● 2-253 2-258 LIST OF FIGURES . . . . . . . . 2-13 . . . . . . . . . 2-16 . . . . . . . . . 2-17 . . . . . . . . 2-20 . . . . . . . . 2-24 Figure 2-6. Model 23A1 Attendant Direct Extension Selector Console . . . . . 2-26 Figure 2-7. Attendant Direct Extension Selector Console Connections . . . . . 2-28 Figure 2-8.
. 2-146 Figure 2-27. Typical Headset Adapter Connections For 7300H Series Multilane Voice Terminals (Except 34-Button Deluxe, BIS, or BIS with Display) . . . . . . . . . . . . . . . . . . . . . . 2-147 Figure 2-28. Typical Headset Adapter Connections For 34-Button Deluxe, BIS, or BIS with Display Voice Terminals . . . . . . . . . . . . . 2-148 Figure 2-29. Typical Headset Adapter Connections For 12-Button MET Sets . . . . . . . . . . . . . . . . . . . . 2-149 Figure 2-30.
TABLE 2-A. System Features TABLE 2-B. Network TABLE 2-C. Data TABLE 2-D. Station TABLE 2-E. Attendant . Features . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . . 2-3 . . . . . 2-3 Features . . . . . . . . . . . . . . . . . . . 2-4 . . . . . . . . . . . . . . . . . 2-5 TABLE 2-F. Partial List of Permissible Data Port (TN726) Options . . . . . . 2-97 TABLE 2-G.
SECTION 2—FEATURES AND SERVICES This section describes the System Features, Network Features, Data Features, Station 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.
System Features System features (Table 2-A) are those that affect the entire operation of the system. All system features are available with both Vl and V2. TABLE 2-A.
Network Features This group of features (Table 2-B) supports communications with the public network and with other locations in the private network of which System 25 can be a part. TABLE 2-B. Network Features FEATURE TYPE * FEATURE NAME S O O O O S S Automatic Route Selection Direct Inward Dialing Off-Premises Stations Tandem Trunking (V2) Tie Trunks Trunk Groups Virtual Facilities (V2) Data Features Data Features (Table 2-C) support the switched data services of the system.
Station Features The many Station Features (Table 2-D) 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-D.
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) (V2 only) and (optionally) a Direct Extension Selector Console. In addition, most multiline voice terminal station features are available to the attendant. TABLE 2-E.
ACCOUNT CODE ENTRY Description Allows voice terminal users to associate an account code with incoming and outgoing calls. This is accomplished by entering the account code at the voice terminal before hanging up. The account code is appended to the SMDR call record and can be used later for accounting or billing purposes.
Interactions C o n f e r e n c e : If more than one user attempts to enter an account code on a Conference Call, the first to enter a code will prevail. ● Repertory Dialing: An Account Code can be stored on a REP DIAL button. Press REP DIAL after ACCT ENTRY has been pressed. ● Speed Dialing: An Account code can be stored in System or Personal Speed Dial Number. ● Transfer: A user can transfer a call to another user, then, before hanging up, enter an account code.
ATTENDANT CALL EXTENDING Description 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).
Considerations Attendant Call Extending allows the attendant to utilize the additional attendant related features such as Attendant Splitting One-Way (automatically places incoming canon hold), Release, Cancel, Return-On-Don’t-Answer, Return-On-Busy, Forced Release (SLAC), Join (SLAC), and Source/Destination (SLAC). Interactions Refer to the other Attendant Feature descriptions for information on related features (Table 2-E).
ATTENDANT CAMP-ON Description 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).
Administration Requirements System: ● Number of seconds before a camped-on call returns to the Attendant Console (1-120 seconds) or No Attendant Camp-On allowed (0) - Default = 30 seconds.
ATTENDANT CANCEL Description 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. Before pressing RELEASE, the attendant presses CANCEL and is automatically reconnected to the calling party. Pressing CANCEL when the Start facility is not active will be ignored.
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. System 25 R1Vl supports only the Direct Trunk Attendant Console (DTAC).
● ● ● Return-On-Don’t-Answer [RTN-DA]: Extended calls not answered are returned to the console on this button if not answered within a specified interval. Attendant Message Waiting [ATT MSG]: Used by the attendant to remotely control Message LEDs on voice terminals. Alarm [ALARM]: The associated status LED flashes when a system trouble has been detected; the LED can be changed from flashing to steadily lit by pressing the button.
terminations on the rightmost two columns of buttons of the inactive console. Ringers disabled on an inactive console will be enabled on the active console for those trunks with dual appearances (appearances on both consoles). All other features on all buttons, including those on the associated Attendant Direct Extension Selector Console will continue to function normally even though the console is inactive. Interactions A DTAC cannot operate in the same system with a SLAC.
— Release ● Trunk terminations–The following is required for each trunk terminated on the console (administered as Personal Line appearances; DID trunks cannot be terminated on a DTAC): Trunk Number — Make this the Principal Station (owner) of the trunk (Yes, No) — Enable Ring (Yes, No). Hardware Requirements Each console requires a port on a ZTN79 ATL Line circuit pack. Figure 2-2 provides a connection diagram for the DTAC.
ATTENDANT CONSOLE, SWITCHED LOOP (V2) 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.
In addition to the LOOP buttons and standard multiline terminal buttons (HOLD, TRANSFER, etc.), the console is equipped with the following feature buttons that provide unique attendant functions. Unless noted, the buttons have green status LEDs. ● ● ● ● ● ● ● ● ● ● ● ● ● ● Start [START]: Initiates the call extending process by placing a caller on hold (on the Source button) and providing internal dial tone to the attendant. No LED.
● Manual Signaling ● Transfer to ● Account Code Entry ● Auto Intercom ● Auto A n s w e r ● Direct Facility Access ● Direct Station Selection ● Flex ● Repertory Data (DSS) DSS Dialing. The last two features can be programmed with dialable numbers by the attendant. When a call is placed using a Flex DSS button or a Repertory Dial button, one of the five switched loops is automatically selected for routing the call to the switch.
Switched Loop Operation All calls that are intended for an attendant position are first routed by the system to a common queue where they wait to be sent to a console. In a configuration having two consoles, the same queue serves both consoles. When an attendant console becomes available to receive a call, the system removes a call from the queue and directs it to an idle loop on the console.
An incoming call from the queue to a console appears on one of the five LOOP buttons; the attendant is alerted to the call by audible ringing, a steadily lighted red lamp, and a flashing green lamp. While the call is ringing and while the attendant is handling the call, the system will direct no more calls to the console. After the attendant ends or releases the call or puts it on hold, another call can come in on an idle button.
from the common queue while the console is unavailable. If this is not done, the button should be reassigned to another of the permissible features. In a two-console configuration, an attendant in Position Busy mode will be covered by the other attendant. Only one console can be in Position Busy mode at a time.
Call Originations Placing a new call from an active console causes interactions with the currently active call. At a console that has the default Automatic Release feature, the active call is dropped when the attendant presses anew LOOP button. The new loop becomes the active one; dial tone is provided, and the attendant can dial a number. If the optional Automatic Hold feature is administered, the interrupted call is put on hold instead of being lost.
● Assign call type priorities and attendant specification. ● Assign call types and ● Assign Position Busy “backup’’ station, inapplicable. attendant two-console configuration. specification for Message Center-Like operation in 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 ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE — — —— .
ATTENDANT DIRECT EXTENSION SELECTION Description Permits the attendant to extend calls to stations by pressing one or two buttons instead of pressing START and dialing the PDC or DDC. 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) in an R1V1 or R1V2 system or with a Switched Loop Attendant Console (SLAC) in an R1V2 system.
❑ ❑ ❑ ❑ ❑ 81 84 82 83 80 ❑ ❑ ❑ ❑ ❑ 72 74 71 70 73 ❑ ❑ ❑ ❑ ❑ 62 63 60 64 61 ❑ ❑ ❑ ❑ ❑ 53 52 54 51 50 ❑ ❑ ❑ ❑ ❑ 41 42 43 44 40 ❑ ❑ ❑ ❑ ❑ 31 30 32 33 34 ❑ ❑ ❑ ❑ ❑ 23 24 22 20 21 ❑ ❑ ❑ ❑ ❑ 11 13 14 12 10 ❑ ❑ ❑ ❑ ❑ 02 03 01 04 00 ❑ ❑ ❑ ❑ ❑ 91 90 ❑ 93 92 ❑ ❑ 94 ❑ ❑ ❑ ❑ ❑ 88 86 87 85 ❑ ❑ ❑ ❑ 78 75 76 77 ❑ ❑ ❑ ❑ 68 66 65 67 ❑ ❑ ❑ ❑ 56 57 55 58 ❑ ❑ ❑ ❑ 48 45 46 47 ❑ ❑ ❑ ❑ 38 36 35 37 ❑ ❑ ❑ ❑ 28 26 27 25 ❑ ❑ ❑ ❑ 18 15 16 17 ❑ ❑ ❑ ❑ 05 06 08 07 ❑ ❑ ❑ ❑ 96 95 97 ❑ ❑ ❑ \ 99 98 89 ❑ 79 ❑ 69 ❑ 59 ❑ ❑ 39
The rightmost button on the bottom of the console 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. Considerations When there are two Attendant Selector Consoles in the system the Group Select button assignments are identical. Whenever an administrative change is made to one console, the other console is automatically changed.
Administration Requirements Special Feature Ports: ● ● Requires a port assignment on a ZTN79 ATL Station Circuit Pack (CP) for each Selector Console. Assign Group Select button hundreds groups. System: ● Assign Attendant Call Park codes. Hardware Requirements Requires an Attendant Selector Console, and a port interface on a ZTN79 ATL Station CP. The Selector Console requires a KS-22911, List 1 Power Supply, associated 115V ac power outlet, and a 400 B-type Adapter.
ATTENDANT DISPLAY (V2; SLAC Only) Description Provides displays of call-related information on a 16-character screen at the top of the Switched Loop Attendant Console (SLAC).
p for Call Park o for not logged-in FPDC. ● Number of calls waiting in the common queue (l-9 or ! for 10 or more) ● Trunk identification for incoming outside calls ● Conference information. Considerations The attendant display provides pertinent information about the currently active call. The following examples show some typical screens. Incoming DID call: 2085 DID 3 The first four digits are the DID number assigned to the attendant. The digit 3 is the number of calls waiting in the queue.
Returning parked call: I 4 }801 Park The call parked on extension 801 at the Selector Console is returning to the attendant. Call from console to system user: 1728 Burns, R ! The extension number and name of the called party are presented. The ! symbol indicates that 10 or more calls are waiting in the queue. Outgoing trunk call: 912126378888 The display shows the digits (up to 14) of the dialed outside number. Digits in excess of 14 are displayed on screen 2.
The call from Carter has been split while the call is extended. After the attendant dials the desired PDC, screen 1 displays called party identification, and screen 2 remains unchanged: &1397 Phelps, T 7 2344 Carter, M & If the attendant now presses RELEASE, both screens go blank.
P r e s s i n g a n y b u t t o n o t h e r t h a n t h o s e listed above causes a message such as “NO INFORMATION” to be displayed. Timer Functions The LOCAL button allows the attendant to have access to the Timer controls on the left side of the display module. In the local mode, the screen can provide clock, calendar, timer, and alarm functions. The local mode is canceled when the LOCAL button is pressed again, a new call arrives, or a call is placed.
ATTENDANT FORCED RELEASE (V2; SLAC Only) Description 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. After Forced Release has taken place, the attendant can receive anew call from the console queue or place a call.
ATTENDANT JOIN (V2; SLAC Only) Description 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. The attendant can use the Join feature to stay on unextended call and give assistance to the other parties.
ATTENDANT MESSAGE WAITING Description Allows the attendant to remotely control the status of Message LEDs on user stations. Considerations This feature allows the attendant to notify stations that a message is available for them. The attendant can activate the Message LED of the station while either (1) ringing, (2) receiving Busy Tone, or (3) talking to a station.
ATTENDANT POSITION BUSY Description 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.
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.
. Personal Lines (Trunk Appearances) on DTACs : All calls to trunks having an appearance in either of the two leftmost button columns will ring normally at the inactive console. All calls to trunks having appearances in either of the two rightmost button columns will not ring. If these trunks also have an appearance at the active console, they will ring there even if they do not normally. . Program: The Program feature remains active at the inactive console. .
ATTENDANT RELEASE Description Releases the attendant from an extended 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.
Interactions ● Attendant Camp-On: External calls that are released when Busy Tone is heard will be camped on. Administration Requirements None. Hardware Requirements None.
ATTENDANT RETURN COVERAGE ON BUSY Description 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). ● On a LOOP button at a Switched Loop Attendant Console (SLAC; V2).
. Send All Calls (DTAC only): If Send Al Calls is activated, returning calls will ring at the DTAC. Administration Requirements System: . Assign number of seconds before unanswered camped-on calls return to Attendant Position (1-120 seconds, or O for No Camp-On) - Default = 30 seconds.
ATTENDANT RETURN COVERAGE ON DON’T ANSWER Description Allows unanswered calls extended by the attendant to be returned to the attendant for additional service. Calls that are not answered after a specified 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 L O O P Attendant Console (SLAC).
call). ● Send All Calls (DTAC only): If Send All Calls is activated, returning calls will ring at the DTAC. Administration Requirements System: ● Assign number of rings before call return to the Attendant Position (1-31) - Default = 5 Rings.
ATTENDANT SOURCE AND DESTINATION (V2; SLAC Only) Description 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. ● The attendant is reconnected to the calling party (the source).
ATTENDANT SPLITTING ONE-WAY AUTOMATIC Description 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.
ATTENDANT SYSTEM ALARM INDICATION Description Provides an 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 reportd immediately to your AT&T Systems Technician. The alarm type that causes an alarm indication is referred to as a Permanent System Alarm.
AUTOMATIC INTERCOM Description Allows a multiline voice terminal user (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. The calling party hears ringback tone and the called party receives standard ringing.
● Call Pickup: When an Automatic Intercom call is picked up via Call Pickup, the AUTO ICOM status LED on the called voice terminal lights steadily. The called party can press AUTO ICOM to enter the call at any time. ● Direct Group Calling: Automatic Intercom calls cannot be directed to DGC groups. ● Exclusion: Any attempt to engage Exclusion while active on an Automatic Intercom call will drop the other party.
AUTOMATIC ROUTE SELECTION (ARS) Description 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.
— FNPA calls made to numbers specified in the FNPA Exception List. — All other FNPA calls. ARS Flow Chart Figure 2-8 provides a simplified ARS flow chart. Bracketed numbers (e.g., [401], [601]) provide a link between ARS administrable action numbers and the associated item on the flow chart. Certain readers may find this reference useful when reading the following description in association with the System 25 Administration Manual.
V1 Systems Only: For calls outside the HNPA (FNPA calls), a check is made against a non-administrable Special Numbers List. The numbers in the list include all “800” and “900” numbers and Telex codes 510, 610, 710, and 810. If a match is found, the call is routed via the local CO facility. For FNPA calls not on the Special Numbers List (Vi), the dialed numbers are checked against the FNPA Exception List (Vl and V2). Up to 32 entries may be assigned to the list.
STATION USER DIALS ARS ACCESS CODE [401] YES CALL ROUTED VIA LOCAL CO FACILITY NO NO I [601-603] VOICE TERMINAL ASSIGNED TOLL RESTRICTION CLASS 1-4 VOICE TERMINALS “RESTRICT OUTWARD CALLS” = YES NUMBER DIALED ON EMERGENCY NUMBERS LIST (911, AND THREE CUSTOMER DEFINED 7-DIGIT NUMBERS NUMBER DIALED INTERNATIONAL, OPERATOR, OR OTHER NO OTHER (SHEET 2) STATIONS [14] STATIONS [13] YES CALLING USER RECEIVES SYSTEM REORDER TONE YES OPERATOR NUMBER DIALED ON TOLL CALL ALLOWED LIST? 64 CODES MAY BE
FROM SHEET 1 NUMBER DIALED WITHIN HOME NPA? V1 ONLY: NUMBER DIALED ON SPECIAL NUMBERS LIST (ALL 800,900, AND TELEX 510, 610, 710, AND 810 CODES) NUMBER DIALED ON FNPA EXCEPTION YES LIST NO CALL ROUTED VIA ASSOCIATED ROUTING PATTERN NO SYSTEM [30] YES YES CALL ROUTED VIA LOCAL CO FACILITY NUMBER DIALED ON HOME NPA NO EXCEPTION LISTS [500] HOME AREA CODE ON NPA ROUTING TABLE [300] AREA CODE ON NO NPA ROUTING TABLE [300] YES YES CALL ROUTED VIA ASSOCIATED ROUTING PATTERN CALL ROUTED VIA ASSOCI
The following tones are associated with ARS: ● Confirmation–Indicates that a queued call is being serviced (trunk available to route call ) ● Busy—Indicates that the called number is busy ● Reorder–Indicates that all trunks are busy, the ARS queue is full, or that ARS calling is denied. ● Preferred Route Tone—Five very short tones that indicate that your call has been queued for the preferred route.
● Direct Facility Access Button: Multiline voice terminal users who have pressed FACILITY to activate the busy-to-idle reminder must wait until all queued ARS users have been serviced. ● Virtual Facilities (V2 only): Virtual Facilities may be used in place of trunk groups in ARS routing patterns. When used with ARS, a digit translation scheme may be associated with each virtual facility. See the “Virtual Facilities” feature description for more information.
— Subpattern A Start and End Time (Hour: Minute) — Subpattern A and B–Route 1, 2, and 3 Facility Access Codes (1-9999) or, in V2, 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, No) Subpattern A and B Overflow FRL (0-3). Terminal (Station Port) ● ARS FRL Level (0-3).
ROUTING SUBPATTERNS (RSP) A AND B ROUTING PATTERNS (1-8) RSP A 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] START/ STOP TIME [101], [102] [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 [210] [ 220] [230] [ 240] FRL
BUSY-TO-IDLE REMINDER Description Enables a multiline voice terminal user to be alerted 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 Description Allows system users to charge outside calls made from other users’ stations to their own PDCs. To charge a call to his or her own 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.
CALL ACCOUNTING 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 3 of the Digital Switch’s Call Processor Circuit Pack. This data can be fed to one of the following peripheral equipment systems: . Station Message Detail Recording (SMDR) equipment for printing a standard call report.
. Data Records: The system prints call records for incoming and outgoing (external) data calls. Calls are considered data calls if they involve a data extension. The following list describes the SMDR data collected for each call and the number of characters in each field. All information is right justified in its field, unless otherwise indicated. The record is provided in a standard 80-column format. The headings for each record item are noted in bold type.
. . number of voice terminals will reflect the total call duration. The maximum time that can be reported is 95 hours, 59 minutes, and 59 seconds. Blank (Column 46) FAC (Columns 47-51- Facility) Indicates the facility used to place the call. For outgoing calls including speed dialed 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.
Interactions . Account Code Entry: Allows users to have an account code or project number associated with each call record. . Direct Group Calling (DGC): For an incoming call to a DGC group that is connected to an announcement and never answered, “O” will be reported in the “STN” field of the call record. If the call is answered by a station after receiving the announcement, that station will be listed in the “STN” field. . Modem Pooling: SMDR records do not reflect modem pool resource usage. .
Description CAS Model 100: The CAS 100, when connected to a serial printer and the System 25 SMDR port, calculates the cost of calls made to outside numbers, stores the cost information, and generates chronological and summary reports. After each incoming or outgoing call is completed, a call record is printed on the Chronological Report.
The CAS performs three main functions; (l) call record processing, (2) report generation, and (3) CAS system management. In addition, a limited directory lookup and message center is provided. The followings a brief description of each function: 1. Process Calls: Involves screening call records, calculating the cost of valid calls, anti storing the call records. 2. Generate Reports: Allows the user to print the stored call record information organized in one of several different ways.
The following table summarizes CAS station and account code 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.
C C C D C C C D D C C C C C C C C C D C C C C C DATE TIME 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 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 1-222-564-2171 IN IN 1-242-563-1324 555-45
ASCII CHARACTER POSITION (Column Number) 01 DESCRIPTION Call Type VALID CHARACTERS C or D Space Date: Month / 0-9 / 06-07 08 Date: Day / 0-9 / 09-10 11 Date:Year 0-9 Space Time:Hour 0-9 15-16 Time: Minute 0-9 17 18-35 Space Dialed Number Error Character 02 03-04 05 12-13 14 36 37 0-9, Space, -, IN ?, or Space Space Duration:Hour 0-9 41-42 43 Duration: Minute 0-9 44-45 46 Duration: Second 0-9 38-39 40 47-51 52 53-56 57-58 59-73 74 75-78 79 Space Facility Space, 0-9, # Spac
ASCII CHARACTER POSITION 00 01-03 04-07 DESCRIPTION (top of form) Space DATE 08-12 13-16 Space TIME 17-23 24-29 Space CALLED 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 Space NUMBER Space DUR Space FAC Space STN Space ACCOUNT Space PDC (Carriage Return) (Line Feed) Figure 2-12.
SYSTEM 25 CABINET . PART OF OCTOPUS CABLE — ZTN82 OR ZTN128 CALL PROCESSOR — — — — — — — C2 PART OF SIP Z21OA ADAPT . — — — C1 355A/AF SMDR OUTPUT DEVICE/CALL ACCOUNTING SYSTEM — LEGEND: C1 -MODULAR CORD (D8W-87) - PEC 2725-07G C2 -OCTOPUS CABLE (WP90780) - PEC 2720-05P 355A ADAPTER RS 232 PLUG TO MODULAR JACK - PEC 2750-A24 355AF ADAPTER RS 232 RECEPTACLE TO NODULAR JACK - PEC 2750-A25 Figure 2-13.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR SMDR OUTPUT DEVICE OR CALL ACCOUNTING SYSTEM PART OF OCTOPUS CABLE C2 PART OF SIP Z210A ADAPT. C1 355AF C3 ADAPT. Z3A4 ADU C1 C4 Z3A1 OR Z3A4 ADU (NOTE) C1 B1 W1 C7 2012D TRANS. 248B ADAPT.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR (PORT X) TDM BUS TN726 DATA LINE PART OF OCTOPUS PART OF CABLE SIP — — — C2 Z210A C1 355AF ADAPT. ADAPT. — — — PART OF SIP — — — C2 400B2 Z210A ADAPT. ADAPT. — — — . Z3A4 ADU . C1 C7 2012D 2 4 8 b TRANS. ADAPT. TN726 DATA LINE C2 PART OF SIP SIP ADAPT .
SYSTEM 25 CABINET . ZTN82 OR ZTN128 CALL PROCESSOR CO OR PRIVATE LINE CIRCUIT PART OF OCTOPUS CABLE — — — — — — C2 — — — PART OF SIP > CONNECT VIA TAE Z21OA ADAPT. TYPICAL MODEM C1 — — — C3 TELCO CENTRAL OFFICE 355AF SMDR OUTPUT DEVICE TYPICAL MODEM LEGEND : C 1C2 C 3355AF ADAPTER MODULAR CORD (D8W-87) - PEC 2725-07G OCTOPUS CABLE (WP90780) - PEC 2720-05P EIA CROSS OVER CORD (M7U-87) - PEC 2724-30C - (RS-232 RECEPTACLE TO MODULAR JACK) - PEC 2750-A25 Figure 2-16.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR PART OF OCTOPUS CABLE — — — C2 . TN726 DATA LINE TN742 ANALOG LINE CO TRUNK FACILITY Z210A ADAPT. Z3A4 ADU 355AF ADAPT. C1 — — — TN758 POOLED MODEM TDM BUS PART OF SIP C2 PART OF SIP — — — — — — — — — — 400B2 Z210A ADAPT. ADAPT. — — — — — — — — — — . C7 2012D 248B TRANS. ADAPT.
CALL COVERAGE—GROUP Description Allows calls to covered stations to be redirected to a group of covering stations. A total of 32 standard Call Coverage Groups may be assigned; for V2 systems, an additional 32 “DGC” call coverage groups maybe assigned. Each standard group may be covered by up to eight call coverage receivers (buttons). There is no limit on the number of covered users (senders) that each Call Coverage Group can include, but a covered user can be assigned to only one Call Coverage Group.
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. In particular, covered calls to multiline sets remain available and can be entered by the called (sender) station.
Interactions (Standard Group Coverage) ● Attendant Console, Direct Trunk: If the Direct Trunk attendant is a receiver for a Call Coverage Group and extends a call (using the Start button or Selector Console) that is unanswered/busy to a member of the group, the call will return On the Return-On-Don’t-Answer (RTN-DA) or Return-On-Busy (RTN-BUSY) button, not on the attendant’s COVER-GRP button. ● Automatic Intercom: Auto-Intercom calls do not receive call coverage.
Interactions (DGC Group Coverage; V2 Only) ● Attendant Console, Switched Loop: If a SLAC is a member of a DGC-Call Coverage Receiver Group, any DGC—Group Coverage call sent to this attendant will enter the common queue and be treated as a coverage call, not as an Attendant— DGC call. Thus, the call will be handled by whichever attendant is administered to receive coverage calls.
. Number of rings before call 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. Ringing, in addition to flashing, is always sent on external calls, though it may not be accepted at the covering stations. Voice Terminal: (Station Port) . . . . Coverage Sender group number (l-32) - Default = 1 Provide Call Coverage ringing on no answer (Yes, No); Default = Yes.
CALL COVERAGE—INDIVIDUAL Description This feature is very similar to Call Coverage–Group. The primary difference is that this is a one-on-one type coverage. An Individual Cover (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 pressing COVER-IND. Each button can be programmed to ring or not to ring.
Interactions ● ● 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 Attendant Console will resume ringing.
CALL FOLLOWING (FORWARDING) Description Allows users who are away from their phone to receive calls at another phone. The feature is functionally equivalent to Call Forwarding. Users can log in their PDC at another voice terminal and receive their calls at that terminal. I.egging in a PDC at a terminal automatically logs the PDC out at any other terminal. PDCs will always have an associated home terminal. If a PDC is not logged in anywhere, calls to the PDC will ring at the home terminal.
Interactions ● Call Coverage: Calls to a logged-in FPDC receive the call coverage of that terminal. [Unanswered calls to a PDC at an away terminal return to the home terminal and receive the home terminal’s call coverage treatment; they do not receive the away terminal’s call coverage.
CALL PARK Description Allows a user to place a call on hold and then pick up the call from any voice terminal in the system. It is used in three typical applications: . . . Call Park: A user places a call on hold and then picks it up at another voice terminal Meet-Me-Conference: A conference member places the conference on hold and pages another employee to join the conference.
A call parked with the Selector Console is retrieved by dialing *8 and the access code assigned to the dedicated Selector Console Call Park button. Each voice terminal user (except the attendant) can only park one call at a time and a maximum of 24 calls can be parked in the system at one time. A call is no longer parked when it is answered, returns to the parking terminal, or is abandoned by the caller.
Administration Requirements Attendant Selector Console: ● Assign Call Park buttons.
CALL PICKUP Description Allows a user to answer a call ringing at another voice terminal. There are two forms of Call Pickup; (l) Directed and (2) Group. Directed Call Pickup: Directed Call Pickup allows calls to most other voice terminals, including Automatic Intercom calls and calls ringing at coverage buttons, to be “picked up” by dialing the Call Pickup code (*7) and the ringing terminal’s PDC.
● Personal Line: After a call is picked up from a Personal Line (PERS LINE) button, the called terminal can still enter the call. Administration Requirements Voice Terminal (Station Port): ● Assign Call Pickup Group Number (1-16, None) - Default = None.
CALL PROGRESS TONES Call Progress tones provide audible feedback on the status of calls during call set-up. ● ● Busy Tone: A slow pulsed tone indicating that all facilities for answering the call are in use. Call Waiting (Camp-On) Tone: A single short tone to a busy terminal indicating that another call is waiting (has been “camped on” by the attendant). ● Confirmation Tone: Three short tones indicating that the system has accepted the instruction entered or that your ARS queued call is being placed.
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. Note: Each of these restrictions is voice terminal oriented, not PDC oriented. Outward Restriction: When outward restricted, a station will be unable to place any outside calls.
ARS Restriction: Special restrictions on each station may be imposed when the call is routed by the ARS feature. Facility Restriction Levels (FRLs) are used to restrict access to trunk groups. An FRL is a single digit (0, 1, 2, 3). A terminal assigned an FRL of 0 has the least privileges, a terminal assigned an FRI. of 3, the most. An FRL is also assigned to each route in each ARS routing pattern. The terminal’s FRI. must be equal to or greater than the route’s FRL in order to use that facility.
Automatic Route Selection: ● Route Facility Restriction Levels Trunk Port: ● Allow dial access to this trunk (Yes, No) - Default = Yes System (V2 only): ● Allow dial access to this virtual facility (Yes, No) - Default = No Hardware Requirements None 2-94
COMMAND MODE 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”; users who are familiar with Command Mode options should read the “Expert Mode” subsection. ) Command Mode supports digital data endpoints connected via Asynchronous Data Units (ADUs) to ports on a Data Line CP (TN726).
: 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. The display shown below is similar to what is actually presented on the screen. (See Tables 2-F and 2-G) for additional information on options.
TABLE 2-F. Partial List of Permissible Data Port (TN726) Options DEFINITION OPTION 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. V2 only: Allow user to change data port options? (71 ) Yes or No. Used to enable/disable User Changeable Options feature.
TABLE 2-G.
COMMUNICATIONS ACCESS MANAGER (CAM) (V2) The CAM program facilitates communication between workstations on the AT&T STARLAN NETWORK (STARLAN NETWORK) and workstations on System 25. Detailed procedures for using CAM can be found in the CAM User Guide. The material here provides a brief overview of CAM capabilities. CAM is an MS-DOS application program that provides an enhanced calling interface and terminal emulation for PCs.
The STARLAN NETWORK communication driver (NAUCOM) is used before CAM is run on a STARLAN NETWORK workstation. The Extended Device driver (CAM232) is used when CAM is run on a PC connected to a System 25 DLC port. The default screen presented when the user accesses CAM is the phone directory screen. The phone screen is divided into five partitions: ● Call Appearance area–provides call appearance for voice lines and data lines for each extension shown. A call timer for each line is also displayed.
CONFERENCE Description Allows up to five parties, including the conference originator, to participate in a conference call. Any voice terminal user, including operators at Direct Trunk Attendant Consoles and Switched Loop Attendant Consoles (V2), can set up conferences. Refer to the description of “(’conference Drop” for additional information on conferencing.
● Call Park: Call park may be used to place a conference on hold. Parked conference calls do not return to the parking station (they remain parked). If a 5-person conference is parked, the conferee who parked the conference will be dropped when someone picks up the parked 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.
CONFERENCE DROP Description Allows a voice terminal user, except for the attendant at a Switched Loop Attendant Console (SLAC, V2 only), 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. Multiline Voice Terminals (except SLAC): On a multiline voice terminal, pressing the DROP button and then pressing the button appearance of a conference party drops that party from the conference.
Interactions None Administration Requirements None Hardware Requirements None 2-104
DATA CALL SETUP Allows a user to originate data calls from a data terminal. System 25 provides three methods of data calling: ● 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. ● V2 Only: Setting up data calls (or voice calls) for another terminal from a data terminal, which is described in the “Third-Party Call Setup” feature description.
DATA SERVICES OVERVIEW System 25’s data features provide switched data transmission at up to 19,200 bps (RS-232 interface ), and a 212A modern 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.
and AB (Signal Ground) to function, while others require more RS-232 control signals to operate. An ADU (Figure 2-19) can send Data Terminal Ready (DTR) from the data terminal to the Data Line circuit and the Data Line circuit can send a control signal to the data terminal. The signals Data Set Ready (DSR), Clear To Send (CTS), and Received Line Signal Detector (DCD) are all connected to the control signal from the DLC in the ADU and available if required by the data terminal.
Data Terminal Dialing mode, or to enter the Setup mode on calls originating from a voice terminal or on auto-answered calls. In the case of most personal computers, a communications program must be executed in order for it to communicate with its own RS-232 port or built-in modem. Once the communications software is running, further operation will be similar to that of the basic terminal. c.
Data Endpoint States The data endpoint may take on three states: (l) 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. Finally, the on-line (off-hook) state is when the data endpoint is actively on a data call.
Setup mode is entered. f. Data Call Setup Mode Data Call Setup Mode is a transitional state entered after Transfer To Data, Data Terminal Dialing, or during auto-answer; it exists during the handshake between data ports. If the endpoints are compatible and handshaking is successful, a data connection is established. If handshake failure occurs, the user is notified and the data endpoint returns to the Idle mode. Successful handshake must occur within 15 seconds of answer at the called data endpoint.
● ● Flashing–Data endpoint is being alerted of an incoming call On Steady–Data endpoint is either in the on-line (off-hook) state or is reserved for another user and busy. Refer to the following feature descriptions for additional information: ● Command Mode ● Data Call Setup ● Data Terminal Dialing ● Expert Mode ● Modem Pooling ● Third-Party Call Setup.
DATA TERMINAL DIALING Description When the user makes a data call 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-H provides a list of the call progress messages.
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. A “mark” character must be included on the DIAL: line to indicate to call processing that the remaining digits are to be sent to the far end prior to insertion of the conversion resource into the connection.
TABLE 2-H. Call Progress Messages for Data Terminal Dialing Displayed Message DIAL: Application Placing a call Meaning Equivalent to dial tone. Enter any required facility number followed by the dialed number and a RETURN. Equivalent to Ringback Tone. Called Placing a call RINGING number (far-end) is being signaled. Provided on internal calls only. Placing a call Equivalent to busy tone. Called number is BUSY in use, or out of service. Provided on internal calls only.
Considerations Data Terminal Dialing allows users to place data calls from their terminals using the Data Terminal Dialing feature and allows users to review the options administered for their data ports. Interactions ● ● ● End-To-End Signaling: (See above text) Modem Pooling: Data calls between analog and digital endpoints require that a conversion resource (TN758) be available. If one is not, the “NO MODEM” followed by “TRY AGAIN” message will be displayed.
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 log 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.
● #5–Insert dialed digits here (in Virtual Facility numbers; (V2 only) ● #–End of dialing The maximum number of dial codes available for a System 25 is 600. In R1Vl, each assigned code is allocated as a ten number block. In R1V2, each assigned code is stored individually in memory. The dial codes assigned in the system must be completely unambiguous. For example, a dialing plan that contains the number “20” cannot contain the numbers “2,” “200-209,’” or “2000-2099.
DICTATION SYSTEM ACCESS Description Permits access to, and control of customer-owned dictation equipment by voice terminal users. Dictation systems may be connected either via single-line voice terminal ports (the preferred method) or via auxiliary trunk ports (if the dictation equipment requires a separate contact closure for proper operation). The dictation system is accessed by dialing a PDC oppressing a DSS button. Considerations Allows users to access and control shared dictation equipment.
SYSTEM 25 CABINET TN742 OR ZTN78 l PART OF OCTOPUS CABLE — — — C2 — — — — — — PART OF SIP SIP ADAPT . W1 B1 C5 DICTATION EQUIPMENT (NOTE) LEGEND: TN742 - ANALOG LINE CP ZTN78 - TIP RING LINE CP B 1 - TYPICAL-103A CONNECTING BLOCK* C 2- OCTOPUS CABLE (WP90780) PEC 2720-05P C 5- MODULAR CORD (D4BU-87) W1 - 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER NOTE : IF CUSTOMER DICTATION EQUIPMENT REQUIRES A CONTACT CLOSURE, A TN763 AUXILIARY TRUNK CP MUST BE USED.
DIGITAL TAPE UNIT (DTU) The Digital Tape Unit (Figure 2-21 ) 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. The recorder is approximately 5 inches wide, 2 inches high, and 10 inches long.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR PART OF OCTOPUS CABLE — — — — — — C2 ● PART OF SIP Z210A ADAPT. C1 355A/AF DIGITAL TAPE UNIT — — — — — — LEGEND: C1 - MODULAR CORD (D8W-87) - PEC 2725-07G C 2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P 355A ADAPTER RS 232 PLUG TO MODULAR JACK - PEC 2750-A24 355AF ADAPTER RS 232 RECEPTACLE TO MODULAR JACK - PEC 2750-A25 Figure 2-22.
DIRECT GROUP CALLING (DGC) Description AllO w S incoming calls to be directed to a specific group of terminals. Up to 32 DGC groups, each including up to 10 members, may be set up. A terminal can be in only one DGC group. Incoming calls on any trunk can be directed to a DGC group. These trunks can also be used for outgoing calls. This feature is referred to as “Incoming Calls Group” in the User Guides for System 25 voice terminals. DGC groups can be administered as Call Coverage groups in R1V2 systems.
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 ● Attendant Camp-On: For V1 systems only: if the attendant attempts to camp-on a second call to a DGC group, it is immediately returned on the console.
● Transfer: For V2 systems only: internal stations can transfer outside (trunk) calls to a busy DGC group. The transferred call will be treated as any other trunk call to a busy DGC group.
DIRECT GROUP CALLING DELAY ANNOUNCEMENT Description 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.
SYSTEM 25 CABINET TN742 OR ZTN78 PART OF OCTOPUS CABLE — — — C2 PART OF SIP ● — — — — — — SIP ADAPT . W1 B1 C5 DELAY ANNOUNCEMENT EQUIPMENT LEGEND: TN742 - ANALOG LINE CP ZTN78 - TIP RING CP B 1- TYPICAL-103A CONNECTING BLOCK* C 2- OCTOPUS CABLE (WP90780) PEC 2720-05P C 5- MODULAR CORD (D4BU-87) W1 - 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER Figure 2-23.
DIRECT INWARD DIALING (DID) Description Allows incoming 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.
sender will flash and will then go dark when the call is answered. However, if the call is placed directly to the attendant position or is forwarded to the position and thereby arrives on a System Access button or a Loop button (e.g., if a DID PDC is logged-in at the attendant position), then no LED indications on the Selector Console will be provided.
Hardware Requirements: Each DID trunk requires a port on a TN753 DID Trunks CP.
DIRECT STATION SELECTION (DSS) Description Allows one-button access to another voice terminal, a paging zone, or a DGC Group. This feature 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.
● Line Selection (Prime Line Preference): When Prime Line Preference is assigned to a DSS button, the button must be pressed to invoke the busy-to-idle reminder, even though its red I-Use LED is lighted. ● Personal Dial Code (PDC): An attempt to program a FPDC on a FLEX DSS button (rather than a PDC) results in Reorder Tone. ● Pooled Facilities: A pooled facility access code may be stored on a FLEX DSS button (but not on a DSS button).
DISTINCTIVE RINGING Description Allows users to distinguish between different types of incoming calls. Users can receive 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. The tone is one second on and three seconds off for multiline voice terminals, and 1.
END-TO-END SIGNALING Description 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 Description Allows multiline voice terminal users to keep other users with appearances of the same Personal Line from listening in on their calls. Exclusion allows users to exclude the attendant and other stations from an existing or held outside call, or to drop other System 25 users from a call. The Exclusion button status and I-use LEDs are lighted steadily when the feature is invoked.
EXPERT MODE (V2) 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.
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.
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 I N V A L I D OPTION and the entry is ignored. Once all changes have been entered, the user enters XE to enable the options. Considerations Expert Mode is primarily for use by computer-driven endpoints that can store command sequences for automated use.
EXTENDED STATIONS Description Allows single-line voice terminals to be located at distances greater than 2000 feet from the system cabinets. Extended stations have the same feature capabilities 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 Description Provides standard station ringing at a location away from the called station. 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. The alerting device is activated whenever the associated station is alerted.
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 terminal. The line requires a ZTN79 ATL Line CP. Figure 2-25 contains connection details. 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.
SYSTEM 25 CABINET ZTN79 ATL LINE CP PART OF OCTOPUS CABLE — — — — — — C2 ● PART OF SIP SIP ADAPT . W1 B1 C1 TERMINAL T1 — — — — — — LEGEND: A1 - SUPPLEMENTAL ALERT ADAPTER (2301-SAA) B 1- TYPICAL – 103A CONNECTING BLOCK C 1- MODULAR CORD (D8W-87) C 2 - OCTOPUS CABLE (WP90780) C8 - MODULAR CORD (D4BU-87) S1 - EXTERNAL ALERT T1 - HYBRID TYPE TERMINAL W1 - 4 PAIR INSIDE WIRING CABLE Figure 2-25.
HANDS-FREE ANSWER ON INTERCOM (HFAI) Description 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 and 7305H04C) and HFAI (7309H01A); these sets provide full service without requiring adjuncts.
— 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. — The HFAI/BIS user may press the SPEAKER (HFAI set) or the SPEAKERPHONE (BIS set) button to end the call. For V2 systems only: if the calling party hangs up first, this is not necessary.
Interactions ● Attendant (V1 Only): The attendant may pass calls to HFAI sets using the Transfer feature and button rather than extending these calls using the START button or the Selector Console. Such calls are then eligible for HFAI service. However, since unanswered transferred calls do not return to the attendant for further service (as extended calls do), this practice is not recommended.
HEADSET ADAPTER ADJUNCT Description The headset adapter adjunct provides an interface 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.
● Figure 2-28 -Typical Headset Adapter Connections for 34-Button Deluxe, BIS, or BIS with Display Voice Terminals ● Figure 2-29 -Typical Headset Adapter Connections for 12-Button MET Sets MET Headset Adapter: Use of a headset with a 10-Button MET voice terminal requires a JS0180-3A Headset Adapter (18 inch cord) or a JS0180-4A Headset Adapter (8 foot cord). Figure 2-26.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE ZTN79 HYBRID LINE CP — ● — — PART OF SIP SIP ADAPT C2 — — — — — — — — — W1 B1 VOICE TERMINAL C1 T1 , C8 502A HEADSET ADAPTER PEC 3164-HFA LEGEND: B1C1C2C8 T 1- TYPICAL-103A CONNECTING BLOCK* MODULAR CORD (D8W-87) - FURNISHED WITH SET OCTOPUS CABLE CABLE (WP90780) - PEC 2720-05P SPECIAL CORD- FURNISHED WITH ADJUNCT 7300H SERIES VOICE TERMINAL EXCEPT 34-BUTTON DELUXE, BIS, OR BIS WITH DISPLAY W I - 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY I
SYSTEM 25 CABINET PART OF OCTOPUS CABLE — — — PART OF SIP ZTN79 HYBRID LINE CP ● SIP ADAPT C2 — — — — — — — — — W1 C1 B1 VOICE TERMINAL T1 I C7 PWR SUPPLY P1 C8 502A HEADSET ADAPTER PEC 3164 - HFA LEGEND : B1 - TYPICAL-103A CONNECTING BLOCK* C 1- MODULAR CORD (D8W-87) - FURNISHED WITH SET C2 - OCTOPUS CABLE CABLE (WP90780) - PEC 2720-05P C8 - SPECIAL CORD - FURNISHED WITH ADJUNCT T1 - 7300H SERIES VOICE TERMINAL (34-BUTTON DELUXE, BIS, OR BIS WITH DISPLAY) W1 - 4 PAIR INSIDE WIRING CABLE*
SYSTEM 25 CABINET TN735 MET LINE CP PART OF OCTOPUS CABLE — — — — — — PART OF SIP ● ● C2 SIP ADAPT W1 B1 400B2 ADAPT C1 MET SET T1 — — — C7 — — — — — — — — — 248B ADAPT 2012D TRANS C8 500A HEADSET ADAPTER PEC 31712 LEGEND: B 1 - TYPICAL-103A CONNECTING BLOCK* C1 - MODULAR CORD (D8W-87) - FURNISHED WITH SET C2 - OCTOPUS CABLE (WP90780) PEC 2720-05P C8 - SPECIAL CORD - FURNISHED WITH ADJUNCT T1 - 7203M SET - 12-BUTTON MET SET W 1- 4 PAIR INSIDE WIRING CABLE* 248B ADAPTER -MODULARIZES 2
HOLD Description 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).
INTERCEPT TREATMENT WITH REORDER TONES Description Reorder tone (fast busy) is provided when an unassigned or toll-restricted number is dialed, a dialing error occurs, or an attempt to park a call fails. Any attempt to dial an unassigned code (PDC, DDC, feature or facility access code) or an unsuccessful attempt to park a call will result in Reorder Tone being provided to the caller.
INTERDIGIT TIMEOUTS Description 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. After timeout, voice terminal dial pad button presses are interpreted as end-to-end signaling requests and touch-tones are placed on the outside line.
LAST NUMBER DIALED (V2) Description Automatically saves the last number dialed from a multiline voice terminal and allows the user to place the call again without 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. To use the feature, the caller first gets dial tone, and then presses the Last Number Dialed button.
● Call Accountability: When a station user dials ##PDC to provide accountability for a call and then dials the desired digits, the ##PDC is not saved by the Last Number Dialed feature. ● Conference: When a station user adds a party to a conference, the number dialed is saved as the Last Number Dialed. ● Direct Station Selection (DSS): Numbers called using an DSS or Flex DSS button are not saved by the Last Number Dialed feature.
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) Preelection. Prime Line Preference: Automatically connects a multiline voice terminal to a specified line or facility designated as preferred when the terminal goes off-hook.
Preselection: Allows multiline voice terminal users to override the above line preference features. Users may simply press a desired line access button before going off-hook. The user will be connected to the facility selected unless the facility is busy and the party using it has invoked Exclusion or is part of a conference call that is at maximum capacity. When off-hook, a user can select a facility by pressing the associated button. (This will terminate the call the user was on.
LINE STATUS AND l-USE INDICATIONS Description Provides users with a visual 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-I summarizes LED states and associated descriptions for line appearances. TABLE 2-I. LED Indications I-Use (Red LED) Line Status (Green LED) Meaning Off Off Facility is idle.
Administration Requirements None Hardware Requirements None 2-158
MANUAL SIGNALING Description Allows a user to signal another voice terminal. The user may do this at any time, whether on-hook or off-hook. 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. The signaling voice terminal also receives the tone and can use this feature while in any call state.
MESSAGE CENTER-LIKE OPERATION (V2; 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. The message center attendant answers incoming calls of the preselected types in the normal way.
operator for the entire system. A call extended by either Attendant to a station that does not answer or is busy returns to the Message Center. ● Two combined Attendant Position/Message Centers; the Attendants at each combined position also function as Message Center operators. The special call types answered by Message Centers can be divided between the two consoles, or both consoles can answer all types.
MESSAGING SERVICES Description Lights an 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.
Station-To-Station Message Waiting: Multiline voice terminals can be assigned (paired) Message Waiting (MSG WAIT) buttons with associated status LEDs. When this indicator is lighted, the user calls the other user for messages. The MSG WAIT LED can be controlled by the two associated terminals o n l y ; either user can toggle the state of both LEDs (e.g., both LEDs go On or Off together) at any time, whether on-hook or off-hook.
MODEM POOLING Description Allows switched data connections between digital data endpoints and analog data endpoints. (Refer also to the description of the system’s data features provided in the “Data Services Overview’’ subsection.) 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.
● On-Premises Data Calls: To establish a data connection between an on-premises analog data endpoint and an on-premises digital endpoint. ● Outgoing Trunk Calls: To establish a data connection between an off-premises analog endpoint (modem) and an on-premises digital endpoint. Considerations Modem Pooling provides a pool of conversion resources that increases data call flexibility.
Hardware Requirements One TN758 Pooled Modem CP provides two conversion resources. Two TN758s are allowed per system cabinet, for a total of 12 conversion resources in a 3-cabinet system.
MUSIC-ON-HOLD Description Provides rnusic 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. Music-On-Hold is not invoked when a conference call is placed on hold or when the attendant “Start” facility is used to place a call on hold.
Hardware Requirements A music source is needed to support the Music-On-Hold feature. The interface is a port on a ZTN78 Tip Ring Line CP or TN742 Analog Line CP. Detailed connection information is provided in the following figures: ● Figure 2-30—Music-On-Hold Equipment Connections (FCC Registered) ● Figure 2-31—Music-On-Hold Equipment Connections (Non-Registered).
SYSTEM 25 CABINET TN742 OR ZTN78 PART OF OCTOPUS CABLE PART OF SIP C2 W1 SIP ADAPT. MOH UNIT W1 368 VOICE COUPLER W1 B1 C6 MUSIC SOURCE W1 2012D TRANSFORMER LEGEND: TN742 - ANALOG LINE CP ZTN78 - TIP RING CP B 1 - TYPICAL-103A CONNECTING BLOCK* C2 - OCTOPUS CABLE (WP90780) PEC 2720-05P C6 - SINGLE-ENDED MODULAR CORD, D4BY W 1 - 4 PAIR INSIDE WIRING* PEC 62513 INCLUDES KS-23395 MOH UNIT, 2012D TRANSFORMER AND 36A VOICE COUPLER * - FURNISHED BY INSTALLER Figure 2-31.
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).
Trunk-Answer-from-Any-Station: Allows any user to answer NS calls. Incoming trunk calls activate an external alerting device such as a bell (“External Alerts” feature). A user can then dial the NS access code and answer the call. Night Service is activated under the following conditions: ● An attendant has pressed NIGHT on either console. ● TAAS NS has been administered for the trunk. ● A NS external alert has been installed and administered.
● Assign Night Service Access Code. Hardware Requirements TAAS NS requires an associated external alert (such as a bell). Each alert requires a port on a ZTN78 Tip Ring Line or a TN742 Analog Line CP. Refer to the “External Alerts” subsection for detailed information and a connection diagram.
NIGHT SERVICE DELAY ANNOUNCEMENTS Description 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.
SYSTEM 25 CABINET TN742 OR ZTN78 PART OF OCTOPUS CABLE — — — C2 PART OF SIP ● SIP ADAPT. W1 — — — B1 C5 DELAY ANNOUNCEMENT EQUIPMENT — — — LEGEND: TN742 - ANALOG LINE CP ZTN78 - TIP RING CP B 1 - TYPICAL-103A CONNECTING BLOCK* C2 - OCTOPUS CABLE (WP90780) PEC 2720-05P C5 - MODULAR CORD (D4BU-87) W 1- 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER Figure 2-32.
OFF-PREMISES STATIONS (OPS) Description An 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 onpremises 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 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.
PAGING SYSTEM ACCESS Description Provides users with dial access or feature button access to paging equipment. As many as three paging zones can be provided, each with its own access code. (A zone is the location of paging loudspeakers, for example, conference rooms, warehouses, or storerooms.) In addition, one access code can be provided to activate all zones. A single-line or multiline voice terminal user (including the attendant) can access paging equipment by dialing the zone access code.
Interactions ● Direct Inward Dialing: A DID call may access a paging code. This allows the user to dial in and utilize the Paging System Access feature. Dial restricting the paging code will block this interaction. Administration Requirements Special Feature Ports (Auxiliary Trunk Interface): ● Assign Paging access code for each paging zone (maximum = 3) to be provided ● Assign All Zones access code ● Dial restrict zone (Yes, No).
PART OF TAE 700A NETWORK INTERFACE BLOCK (110- OR 66-TYPE CONNECTING BLOCK) SYSTEM 25 CABINET I ZTN76 OR ZTN77 W1 B W1 B1 C5 † PAGING SYSTEM LEGEND : Z T N 7 6 - CO GROUND START TRUNK CP Z T N 7 7 - CO LOOP START TRUNK CP B - 3 TO 1 SPLITTER CABLE-CONNECTORIZED (OR6016) PEC 2720-06X B1 - TYPICAL-103A CONNECTING BLOCK* C 5 - MODULAR CORD (D4BU-87) W1 - 4 PAIR INSIDE WIRING CABLE* * FURNISHED BY INSTALLER † PAGING SYSTEM - PAGE PAC 20 E/W ZONE MATE 9 - PROVIDES 9 PAGING ZONES, PLUS ALL-ZONE PAGING F
SYSTEM 25 CABINET 25 PAIR DE CABLE PART OF 66-BLOCK TN763 A ❘❘❘❘❘ ❘❘❘❘❘ W1 278A ADAPTER W1 C5 B1 PAGING OR DICTATION SYSTEM -V D-181321 ZENER KIT GRO C6 48V DC P1 GRD LEGEND : -48V DC I T N 7 6 3- AUXILIARY TRUNK CP A - SINGLE-ENDED 25 PAIR CONNECTOR CABLE (A25D) (NOTE 1) B1 - TYPICAL - 103A CONNECTING BLOCK* C5 - MODULAR CORD (D4BU-87)* C6 – SINGLE-ENDED MODULAR CORD (DYB4) (NOTE 2) P1 - KS-22911, L1, POWER SUPPLY, 48 VOLT DC (NOTE 2) W1 – INSIDE WIRING CABLE (4-PAIR)* NOTES : 1.
PERSONAL DIAL CODE (PDC) Description Each station is assigned a PDC. The user may log in the PDC at any other voice terminal, and calls to the PDC will follow the user. A PDC can be assigned to a convenience voice terminal (i.e., not associated with a particular user) and to data terminals with modems. Digital data endpoints are assigned Data Dial Codes (DDCs). There are two types of PDCs: ● PDCs: Assigned to users with their own voice terminal (referred to as the “home terminal”).
A call unanswered at the away terminal will be directed back to the home terminal unless one of the following busy conditions exists at the home terminal: (1) it is a multiline terminal with both System Access buttons busy and with no idle call coverage receiver or (2) it is a single-line voice terminal that is off-hook, has no idle Call Coverage receiver, and has no idle hunt-to station. While either of these busy conditions exists at the home terminal, the call will not return to the home terminal.
Interactions ● Call Coverage: Calls to a logged-in FPDC receive the call coverage of that terminal. lJnanswered calls to a PDC at an away terminal return to the home terminal and receive the home terminal’s call coverage treatment; they do not receive the away terminal’s call coverage. ● Direct Inward Dialing: In systems with DID service, PDCs, FPDCs, DGC group numbers, DDCs codes, and facility access codes may match the last 2, 3 or 4 digits of DID numbers.
PERSONAL LINES Description Provides a dedicated outside line for multiline voice terminal 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 8 in R1V1). Up to four parties may be offhook on the line at the same time (the line itself is the fifth conferee).
● Line Selection (Prime Line Preference): Prime Line Preference may be assigned to a Personal Line. ● Pooled Facility: A Personal Line may also be a member of a pooled facility group. ● Toll Restriction (see “Calling Restrictions”): A call over a Personal Line is subject to the toll restrictions of the station on which the call was placed.
POOLED FACILITY - DIAL ACCESS Description Allows both multiline and single-line voice terminal 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 - DIRECT ACCESS Description 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 IUse LEDs associated with the button light steadily, the user may complete the call.
Administration Requirements Voice Terminal (Station Port): ● Assign Direct Facility Access (FACILITY) buttons. Trunks: ● Assign Facility Access Codes.
POWER FAILURE TRANSFER (PFT) Description Provides service to and from the CO for a limited number of prearranged single-line v o i c e 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.
trunks. If Ground Start trunks are used, a 55A1 Ground Start Button must be provided at each PFT set. 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.
AT&T 10B EMERGENCY TRANSFER UNIT (TRUNK) SWITCH (CPU) ADDITIONAL ETU FOR PROPER OPERATION THIS UNIT MUST BE GROUNDED Figure 2-35.
SYSTEM 25 CABINET TRUNK PORT ETU 25-PAIR ETU TO SWITCH (TRUNK) — — — — — -48V CALL — ETU TO CO — — — TO ADDITIONAL ETUs ADDITIONAL ❑ ETU ETU TO ETU TO SWITCH STATION PORT 25-PAIR OFFICE 25-PAIR ❑ CPU PROCESSOR CENTRAL TAE OCTOPUS CABLE (LINE) — — — — — — — — — PART OF SIP 858A ADAPT.
700A NETWORK INTERFACE BLOCK (66-, OR 11O-TYPE) DIGITAL SWITCH CO TRUNK CP NETWORK ACCESS CO TRUNK CP RJ2x1 CO TRUNK CP CO TRUNKS CO TRUNK CP CENTRAL OFFICE CO TRUNK CP C2 ETU (2) CPU GROUND CO TRUNK CP ANALOG STATION CP CALL PROCESSOR OCTOPUS CABLE — — — — — — — — — LEG 7 C1 C1 PART OF CPU ETU (3) ETU (4) CPU GROUND GROUND ● LEG 8 ● ● PART OF SIP -48V DC TO SINGLE -48V DC POINT GROUND PFT STATION " " FROM VOICE TERMINALS (4 PAIR BUILDING WIRE) " ● LEGEND : A - SINGLE ENDED
PROGRAM Description 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).
Special Characters (V2) The following special characters may be used in Repertory Dialing and Personal Speed Dialing numbers on R1V2 systems only: CHAR. USED IN REPERTORY DIALING NUMBERS * 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. ) #* Transmits an actual “*”. ## Transmits an actual “#”.
Programming Procedures Program mode may be entered either by dialing a code (#4) or by moving the Test/Program switch to P (on voice terminals so equipped). If the code is used to enter program mode, the terminal remains in program mode until the user goes on-hook or a timeout occurs.
Considerations T h e P r o g r a m feature allows users to assign their own Personal Speed Dial/Flex DSS/Repertory Dial numbers. This is particularly useful where working arrangements or personnel responsibilities change. Interactions ● Users cannot place or answer calls while in the program mode. Incoming calls will receive Busy Tone.
RECALL Description Single-line voice terminal users can obtain System 25 Recall Dial Tone by pressing the RECALL button (not all single-line sets have a RECALL button). Pressing RECALL is equivalent to briefly pressing and releasing the switchhook (switchhook flash). The RECALL button on a multiline voice terminal can be used, under specialized conditions, to send a switchhook flash to the Central Office (for example, to access Centrex services).
REMOTE ADMINISTRATION INTERFACE Description 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 onpremises SAT.
REPERTORY DIALING Description 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. Programming procedures and other information can be found in the “Program” feature description.
Administration Requirements Voice Terminal (Station Port): ● Assign Repertory Dial (REP DIAL) buttons.
SEND ALL CALLS (V1) Description Allows multiline voice terminal users whose calls are covered to temporarily direct some incoming calls to coverage and turn off their ringers to these calls. This feature is activated by pressing the SEND ALL CALLS button. It is deactivated by pressing the button a second time. Considerations Send All Calls is a relevant feature only for stations that have some form of coverage treatment.
A covered station with Send All Calls activated will ring when called by its individual coverage station if there is only one coverage receiver for this station. ● Distinctive Ringing: Normal audible ringing is turned off for most incoming calls when Send All Calls is activated, unless single-ring reminder is administered. ● Line Status Indications: The line status LEDs still flash for incoming calls when Send All Calls is in effect, even though normal ringing is cut off.
SEND ALL CALLS (V2) Description Allows multiline voice terminal users to turn off their ringers and invoke a “do not disturb” condition toward incoming calls. In addition, users who have coverage will have those calls directed immediately to coverage, without the normal system ringing delay. Send All Calls also allow-s covering users to temporarily remove their voice terminals from the coverage path. This feature is activated by pressing the SEND ALL CALLS button.
If a station is translated to not send ringing to coverage when calls to this station are unanswered, the Send All Calls feature overrides this instruction (ringing will b e sent). If a covering station activates Send All Calls, the station is removed from the coverage path completely. Coverage calls will not be directed to the station.
SPEAKER Description Allows 7300 H-series voice terminal users to turn On a built-in speaker. The speaker allows on-hook dialing, group listening, and monitoring of call progress signals. The speaker is turned on by pressing SPEAKER. 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 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. Lifting the handset during speakerphone operation automatically turns off the speakerphone.
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.” The S102A Speakerphone does not require supplemental power, except when used with a 34-Button Deluxe voice terminal.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE — — — ZTN79 HYBRID LINE CP ● — PART OF SIP SIP ADAPT C2 — W1 B1 C1 VOICE TERMINAL T1 — C8 — — — — — — LEGEND : B1 C1 C2 C8 T1 W1 - * - FURNISHED BY INSTALLER S102A SPEAKERPHONE PEC 3163-HFU TYPICAL-103A CONNECTING BLOCK* MODULAR CORD (D8W-87) - FURNISHED WITH SET OCTOPUS CABLE CABLE (WP90780) - PEC 2720-05P SPECIAL CORD- F U R N I S H E D W I T H A D J U N C T 7300H SERIES VOICE TERMINALS EXCEPT 34-BUTTON DELUXE 4 PAIR INSIDE WIRING CABLE* Fi
SYSTEM 25 CABINET PART OF OCTOPUS CABLE — — — — ZTN79 HYBRID LINE CP ● C2 PART OF SIP SIP ADAPT B1 Z400F ADAPT C1 VOICE TERMINAL T1 — — — — C7 C8 — — — — PWR SUPPLY P1 — — — — S102A SPEAKERPHONE PEC 3163-HFU LEGEND : B1 - TYPICAL-103A CONNECTING BLOCK* C1 - MODULAR CORD (D8W-87) - FURNISHED WITH SET C2 - OCTOPUS CABLE CABLE (WP90780) - PEC 2720-05P C8 - SPECIAL CORD - FURNISHED WITH ADJUNCT T1 - 7305H02B VOICE TERMINAL (34-BUTTON DELUXE) W1 - 4 PAIR INSIDE WIRING CABLE* C7 -MODULAR CORD (D6AP-
SYSTEM 25 CABINET PART OF OCTOPUS CABLE — — — TN735 — — — ● MET ● PART OF SIP C2 LINE CP SIP ADAPT W1 B1 400B2 ADAPT MET SET T1 C1 — — — C7 C8 248B ADAPT S101A SPEAKERPHONE PEC 31711 — — — — — — — — — 2012D TRANS LEGEND: B1 - TYPICAL-103A CONNECTING BLOCK* C1 - MODULAR CORD (D8W-87) - FURNISHED WITH SET C2 - OCTOPUS CABLE (WP90780) PEC 2720-05P C8 - SPECIAL CORD - FURNISHED WITH ADJUNCT T1 - 7203M SET - 12-BUTTON MET SET W1 - 4 PAIR INSIDE WIRING CABLE* \ 248B ADAPTER - MODULARIZES 2012D
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 Dial ring numbers include frequently-dialed DDD numbers (together with leading facility access codes for WATS, FX etc. ) and account codes.
were dialed directly. restriction. This includes analysis of the number for the various types of This feature can also be used when entering account codes. After pressing ACCT ENTRY or flashing the switchhook and dialing “*O”, the user can enter a System Speed Dialing code. The stored number associated with the code (the account code) will be listed in the SMDR report. Multilane voice terminals users may assign System Speed Dialing codes to Repertory Dialing (REP DIAL) buttons.
● Personal Lines: The Speed Dialing feature is not accessible from Personal Lines. ● Repertory Dialing: Storing a System Speed Dialing code (#100 -#189) on a REP DIAL button saves memory space, compared to storing the whole number again on the REP DIAL button. ● Speed Dialing: A Personal Speed Dialing number can include a System Speed Dialing code only as the first four characters (but nowhere else). Personal Speed Dial numbers cannot include Personal Speed Dialing codes.
STARLAN NETWORK ACCESS (V2) 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 INTERFACE circuit pack (ZTN84) is the principal hardware element connecting System 25 and the STARLAN NETWORK. One or more of these circuit packs m a y b e m o u n t e d i n t h e S y s t e m 2 5 c a b i n e t ( s ) .
● 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. This connection must be through a DLC or a STARLAN NETWORK that is, in turn, connected to System 25 by a STARLAN CP. Refer to the Communications Access Manager (CAM) Program feature description for a more detailed description of the program.
The STARLAN NETWORK View of System 25 From the STARLAN NETWORK, the STARLAN CP functions like a STARLAN NETWORK workstation equipped with a Network Access Unit (NAU). The NAU enables STARLAN NETWORK workstations and servers to access and exchange data over the network. Plug number 1 of the STARLAN CP octopus cable should be connected to an “IN” jack on the Network Extension Unit (NEU) (see Figures 2-43 and 2-44).
Calls from STARLAN NETWORK to System 25 A STARLAN NETWORK workstation accesses a host computer connected to System 25 (either a local host or a remote host that can be reached using the Modem Pooling feature). 1. The STARLAN NETWORK workstation loads CLIENT and NAUCOM and then CAM software (discussed in the Communications Access Manager Program feature description) and selects a directory entry for the host. 2. CAM communicates with the STARLAN CP to place the call. 3.
PART OF SIP C2 I ZTN78 I I TN742 I I I I ❘ I NEU (STARLAN HUB) B1 A1 A2 ❘ ZTN84 SYSTEM 25 W1 2500 SINGLELINE PHONE C2 (LEG 1 ONLY ) IN C1 STARLAN WORKSTATION PHONE IN OUT IN C1 PC NAU NEU ZTN84 ZTN78 TN742 A1 A2 B1 C1 C2 C5 W1 - C5 NAU NETWORK ACCESS UNIT - PEC 2614-100 NETWORK EXTENSION UNIT - PEC 2610-001 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 D
PART OF SIP ZTN79 ❘ C2 W1 B1 A1 A2 ZTN84 SYSTEM 25 ATL PHONE C2 (LEG 1 ONLY) C1 C3 C4 T1 A3 IN C1 NEU PHONE IN OUT IN C1 PC NAU STARLAN WORKSTATION NAU NEU ZTN79 ZTN84 A1 A2 A3 B1 C1 C2 C3 C4 T1 W1 NOTE 1: 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
ATL Adapters The ATL adapter (KS23475) is a connection block that provides: 48V dc power from T1 (via modular cords C4 and Cl) to the ATL phone, data connections from the STARLAN workstation, and phone connections from the ATL phone (via modular cord Cl) over a shared common cable (C3) to System 25. The phone and data connections are on separate wire pairs that are split-out at the SIP “Y” adapter (Al).
STATION HUNTING Description 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 Call Coverage.
Interactions ● Attendant Camp-On: When the attendant extends a call to a busy terminal in a hunt group, the call hunts for an idle terminal. If none is found, the call Camps-On to the called terminal. ● Call Coverage: Station Hunting initially overrides all call coverage options. When a call to a voice terminal that has Call Coverage exhausts the terminal hunting possibilities, call coverage is invoked.
STATION-TO-STATION MESSAGE WAITING Description Allows a multiline voice terminal to turn On a Message Waiting LED located on another multiline voice terminal by assigning a MSG WAIT button on each terminal. Pressing MSG WAIT causes the LED on the signaling and signaled terminals to light. This feature allows a user to inform another user that they have a message for them. Of course, other arrangements can be made as to the meaning of the signal.
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.
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. Procedures for performing Centralized and Advanced Administration are provided in System 25 Adrninistration Manual and System 25 Advanced Administration Manual, respectively. Considerations For RlV2, the default system administration password (systemx5) can be changed through a new administration item.
following characteristics: Display: The minimum display size is 16 lines by 80 columns. The port provides both carriage return and line feed characters to position the cursor at the start of the next line. Destructive scrolling is also expected (new lines added at the bottom of the screen and topmost lines disappear). Full duplex operation is required. Alphabetic ASCII characters in both upper-case and lower-case will be sent to the SAT, along with ASCII numerals and some basic ASCII symbols.
Figure 2-45.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR PART OF OCTOPUS CABLE — — — — — — C2 ● PART OF SIP Z210A ADAPT. — — — C1 355A/AF SYSTEM ADMINISTRATION TERMINAL — — — LEGEND : C1 - MODULAR CORD (D8W-87) - PEC 2725-07G C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P 355A ADAPTER RS 232 PLUG TO MODULAR JACK - PEC 2750-A24 355AF ADAPTER RS 232 RECEPTACLE TO MODULAR JACK - PEC 2750-A25 Figure 2-46.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR PART OF OCTOPUS CABLE ——— C2 PART OF SIP Z210A ADAPT. ● C1 355AF ADAPT. C3 C1 Z3A4 ADU — — — PART OF SIP — — — — — — — SYSTEM ADMINISTRATION TERMINAL ❘ Z3A1 ADU C1 B1 W1 C4 ❘ SIP 400B2 ❘ ADAPT. ADAPT. ❘ ❘— — — — — — —❘ C7 2012D TRANS. LEGEND : 248B ADAPT.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE — — — ZTN82 OR ZTN128 CALL PROCESSOR C2 — — — Z210A ADAPT. C1 355AF ADAPT. C3 PART OF SIP — — — — — — —❘ — — — ❘ C2 400B2 Z210A ● ❘ ADAPT. ❘ ADAPT. — — — ❘— — — — — — —❘ (PORT X) TN726 DATA LINE TDM BUS ● PART OF SIP Z3A4 ADU C1 C7 2012D TRANS. — — — TN726 C2 DATA LINE ● 248B ADAPT. PART OF SIP SIP ADAPT.
PART OF OCTOPUS CABLE — — — SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR — — — CO OR PRIVATE LINE CIRCUIT CONNECT VIA TAE PART OF SIP Z210A – ADAPT. l — — — – TYPICAL MODEM C1 — — — – SYSTEM ADMINISTRATION TERMINAL 355AF – TYPICAL MODEM LEGEND: C1 C2 C3 355AF ADAPTER - MODULAR CORD (D8W-87) - PEC 2725-07G - OCTOPUS CABLE (WP90780) - PEC 2720-05P - EIA CROSS OVER CORD (M7U-87) - PEC 2724-30C - (RS-232 RECEPTACLE TO MODULAR JACK) - PEC 2750-A25 Figure 2-49.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR TN758 POOLED MODEM TDM BUS TN726 DATA LINE TN742 ANALOG LINE CO TRUNK FACILITY PART OF OCTOPUS CABLE — — — C2 PART OF SIP Z210A ADAPT. ● — — — C1 355AF ADAPT. C3 PART OF SIP — — — ❘— — — — — — —❘ C2 Z210A 400B2 ● ADAPT. ADAPT. — — — ❘— — — — — — —❘ ——————— Z3A4 ADU — C1 ❘ 2012D TRANS. CONNECTED AS OPS OR CO FACILITY CO CABLE C7 248B — ADAPT.
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.
● M o s t R e c e n t S y s t e m E r r o r s : The ten Most Recent System Errors are recorded by the system, regardless of their level of severity. These are stored in the Most Recent System Errors log. Error Logs The three error logs can redisplayed via the System Administration Terminal. The data in the log is useful in diagnosing and analyzing troubles, particularly when the problem has not yet caused an alarm or when alarms cannot be retired by replacement of maintenance objects.
TANDEM TRUNKING (V2) 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 9. Incoming calls on these trunks may route out of System 25 over ground start, loop start, or tie trunks.
— If the requested trunk pool is dial accessible, an outgoing trunk is selected and the call proceeds normally. — If the requested trunk pool is not dial accessible, reorder tone is returned to the calling party. Any attempt to dial an outgoing trunk pool by non-tandem tie trunks (that is, tie trunks whose trunk number does not begin with 9) results in reorder tone being returned to the calling party.
TEST Description 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. The terminal also rings during the test. Considerations Test assures users that all LEDs are working and that the built-in speaker is functional. The Test switch on some voice terminals is spring loaded; upon release, the switch returns to a normal on-line position.
THIRD-PARTY CALL SETUP (V2) Description The Third-Party Call Setup feature allows a data terminal (the third party) in Command Mode to set up 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.
Setting Up A Third-Party Call To set up a call from the third-party data terrninal, the user selects from the entry-level Command Mode menu (see Figure 2-51). The user then enters the characters as required to call the destination terminal. Calls may be completed as follows. Note: If a character is entered incorrectly, the ASCII character backspace (BS or CTRL-H keys) or underscore (_) may be used to cancel a previously entered character.
Interactions ● Call Coverage Third-Party Call Setup calls to the source terminal will not be directed to a coverage station. If the source terminal is not answered before coverage is invoked, the call is dropped and the N O A N S W E R / D I S C O N N E C T E D messages are displayed at the third-party data terminal. ● Call Following If calls to a source terminal have been forwarded to another terminal (via Call Following), Third-Party Call Setup calls will be forwarded.
TIE TRUNKS Description Provides a private communications link between System 25 and another PBX. 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 signalings supported on both incoming and outgoing calls (and maybe different for incoming and outgoing calls).
● Assign Night Service Delay Announcement (1, 2, or 0 for none) - Default = 0 ● Dial-Inward Capability (Tone or Pulse) - Default = Pulse. Hardware Requirements Requires port interfaces on a TN760B Tie Trunk CP.
TOUCH-TONE AND DIAL PULSE SERVICES Description All single-line voice terminals and MET sets are equipped with touch-tone dial pads that generate Dual Tone Multifrequency (DTMF) signals when a dial button is pressed. The 7300H series (MERLIN) voice terminals are equipped with touch dial pads that generate digitally coded signals when a dial button is pressed. Each pool of outside lines and each Personal Line maybe independently arranged for either touch-tone or dial pulse service.
Description Allows a user to transfer any call to another voice terminal. 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) and may receive Music-OnHold, if available. The system will automatically select an idle System Access button. The user may dial the desired number or select another facility button and dial the call.
calls over a transferred trunk. ● Hold: An outside call placed on hold during call transfer receives music-on-hold, if available. A user attempting to return to a held internal call that has been abandoned will hear nothing. A user attempting to return to a held CO trunk call that has been abandoned hears CO dial tone or receives CO intercept treatment until the CO disconnects. ● Music-On-Hold: For V2, a new administration item allows Music-On-Hold to be enabled or disabled for “Special Hold.
TRANSFER TO DATA Description 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. This feature was formerly called One-Button Transfer to Data (V1). (Refer also to the overview of the system’s data features provided in the “Data Services Overview” description.) Data terminal calls can be set up from a multiline voice terminal with a DATA button.
Preindication is canceled: ● If the user goes on-hook before transferring the call to data ● If the user preindicates on a second DATA button ● If, after dialing is complete, a second DATA button is pressed. Preindication is canceled for the first data terminal and the data call is transferred to the second data terminal. When Preindication is canceled, reservation is canceled.
TRUNK GROUPS Description Allows each trunk in the system to reassigned 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. This grouping provides resource pooling that results in better service with a given number of trunks.
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. Tie trunks groups can be automatic, wink start, immediate start, or delay dial. Dual Tone Multifrequency (DTMF) signaling (touch-tone) or dial pulse signaling can be used between the System 25 and the far end switch. System 25 can send or receive either type of signaling required by the distant switch (DID trunks can only receive dial pulse signals).
Administration Requirements Trunk Port: ● Assign Trunk Type And Number ● Assign Class Of Service Code [DID - (l-4); Other - (0-15)] ● Assign Facility Access Code - Default (See Note) ● Allow Dial Access (Yes, No) - Default = Yes ● Assign To DGC Group (Group Number 1-32, or O for none) - Default = ● Make This a Directed Night Service Trunk (Yes, No) - Default = Yes ● Assign Night Service Delay Announcement (Announcement 1 or 2 or 0 for none) Default = 0 ● Dial-Inward Capability (Tone or Pulse)
TRUNK-TO-TRUNK TRANSFER Description 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 conference 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, DID or tie trunk. The other call may be on any type of trunk and may be incoming or outgoing.
USER CHANGEABLE OPTIONS (V2) 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-J contains brief descriptions of the user changeable options. TABLE 2-J.
{Change (Options Display table) <300><1200><2400><4800><9600><19200> (Cancel changes) (Enable changes) DISCONNECTED Figure 2-51. Command Mode Menu Tree (Options Display table)
Viewing Options W h e n is selected, current and default values for the various data port options are displayed, as shown below: OPTIONS Speed (highest) Parity Mismatch Local Echo Answer Text Connect Indicat. Recall Sequence CURRENT 9600 Even Yes Yes Yes Yes Br - Br DEFAULT 19200 (Auto) Even No Yes Yes Yes Br-Br At this point the user can exit from the View Options menu, Change options, or View options again (redisplays the Options table).
Changing Data Port Speed The procedure for changing Speed settings is different from the procedure for changing the settings of other options. Within the Speed menu, the user may find that several values are marked with Xs. To change a speed, move the cursor beneath each value to be changed and t y pe “+” to add the value or “-” to delete it.
● If the user selects < E n a b l e o p t i o n s > , the system incorporates the changes requested and displays the message D I S C O N N E C T E D . If Autobaud is off, the user must now press BREAK to return to Command Mode. If Autobaud is on, the user must press BREAK and RETURN to return to Command Mode. Note: If a user attempts to enable options during a “SAVE” operation by the system administrator, the message “options changed FAILED” will be displayed.
VIRTUAL FACILITIES (V2) 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. Up to ten virtual facility numbers (VFNs) may be administered.
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. The pound sign (#) is used as an escape character within the digit string and indicates that the character following the pound sign requires special interpretation.
The “#5” indicates that the destination number should be inserted here, rather than at the end of the VF translation. — The “#*” indicates that the system should transmit a “*” symbol as the first character of an identification code. — The “12345” represents the remaining characters in the identification code.
— Since “#5” was not embedded within this VFN, the destination telephone number (12125551643) will be transmitted after the WATS access code. VF codes may be included in numbers stored in REP DIAL buttons, System Speed Dialing codes, and Personal Speed Dialing codes if the VF code is used at the beginning of these numbers. VF codes may not be assigned to FACILITY buttons and may not be embedded in other virtual facility numbers.
LIST OF FIGURES Figure 3-1. System . 3-1 Figure 3-2. Call Processor (ZTN82 or ZTN128) Circuitry . . . . . . . . . . 3-3 Figure 3-3. Memory . 3-5 Figure 3-4. TDM Bus Time Slot Generation (Not A Timing Diagram) . . . . . 3-6 Figure 3-5. TDM Bus Diagram - Three Cabinet System . . . . . . . . . . 3-9 Figure 3-6. Equipment Connected to System 25 Via the Call Processor and Port Circuit Packs (Sheet l of 3) . . . . . . . . . . . . . . . . 3-11 Figure 3-7. Port Figure 3-8. Unique Figure 3-9.
LIST OF TABLES TABLE 3-A. TDM BUS Time Slots . TABLE 3-B. Signaling Type Summary . . . . . . . . . . . . . . . . TABLE 3-C. TN7670B Tie Trunk Preferred Signaling Formats -iii - . . . . . . . . 3-8 . . . . . . . . 3-34 . . . . . . . .
SECTION 3—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 sehematic diagram of the System 25 digital switch. The basic switch hardware consists of the following: ● Common Control — Memory Bus Call Processor Circuit Pack (CP) — Memory CP. ● Switching Network Time Division Multiplex (TDM) Bus — Port Circuits — System Resource Circuits: Service Circuit, Tone Detector, and Pooled Modem.
Common Control The Common Control circuitry consists of the Call Processor (ZTN82 in R1V1 or ZTN128 in R1V2) and Memory (ZTN81 in R1V1 or ZTN127 in R1V2) Circuit Packs and associated memory bus which is a 60-wire (including grounds), 39-bit (16-data, 23-address,), 6 MHz frontplane flat ribbon cable. Call Processor Circuit Pack (ZTN82 or ZTN128) The Call Processor runs the system feature code. It is powered from the backplane by +5 and -5 volts.
TO EMERGENCY TRANSFER UNIT (ETU) EIA CHANNELS (RS-232C) INTERRUPT — CIRCUITRY \ / SERIAL SERIAL SERIAL SERIAL CHANNEL CHANNEL CHANNEL CHANNEL 1 2 3 4 -48V DC ETU CONTROL — BUS ERROR CIRCUITRY MICROPROCESSOR (68010) EIA — CONTROL EIA CONTROL LED RESET CIRCUITRY PROCESSOR BUS ● ● ● ● ● ● MEMORY MANAGEMENT FRONTPLANE INTERFACE (BUS BUFFERS) — / TO MEMORY\ NETWORK CONTROLLER TDM BUS LEADS / SAKI ● ● ● READ ONLY MEMORY (64K) TIME OF DAY CLOCK CIRCUIT PACK VIA FRONT PLANE BUS RANDOM ACC
Network Controller: The network controller transmits control channel messages between the Call Processor and the port circuits over the TDM bus. The controller also monitors system clocks. The controller includes an 8-bit microprocessor that acts as a throttle passing messages between the Call Processor and the port board microprocessors. All uplink messages from the port circuits are checked for consistency and passed to the Common Control.
Memory Circuit Pack (ZTN81 or ZTN127) The Memory Circuit Pack provides for the storage of software associated with system operation. This software includes call and administration processing, and other related programs. The circuit pack is powered from the backplane by +5 volts. Each system must include one Memory Circuit Pack.
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 following: ● Time Division Multiplex (TDM) bus ● Port ● System Resource Circuits. Circuits The TDM bus connects the intelligent ports to the Common Control circuit packs and other ports through the network control circuit.
Two time slots are required for each 2-party conversation. Each party transmits (talks) on one time slot and receives (listens) on another. Only five parties are allowed in a conference. During a conference connection, each member of the conference transmits on an individual time slot while receiving on as many as four other time slots. The actual switch capacity is 115 simultaneous 2-party conversations). Table 3-A shows the allocation of the 256 time slots.
TABLE 3-A. TDM BUS Time Slots Time Slot No. Function 00 thru 04 Control (5) -TonesDial Tone Busy Tone Re-order Tone Ringback Tone Data-Null Voice-Null Music 697 Hz* 770 Hz* 852 Hz* 941 Hz* 1209 Hz* 1336 Hz* 1447 Hz* 1637 Hz* (15) 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 thru 254 Call Processing (235) 255 Not Used (1) * These tones are used to generate touch-tone signals.
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 3-5.
Port Circuits The following port circuit packs provide the link between trunks and external equipment and the TDM bus: ● Analog Line (TN742) ● ATL Line (ZTN79) ● Auxiliary Trunk (TN763) ● Data Line (TN726) ● DID Trunk (TN753) ● Ground Start Trunk (ZTN76) ● Loop Start Trunk (ZTN77) ● MET Line (TN735) ● STARLAN ● Tie Trunk (TN760B) ● Tip Ring Line (ZTN78).
SINGLE-LINE VOICE TERMINALS (420, 500, 2500, 2514, 2554, 7101A) — — — — — — — — RECORDED ANNOUNCEMENTS — — — — — — — — DICTATION EQUIPMENT — — — — — — — — EXTERNAL ALERTING DEVICES — — — — — — — — MUSIC-ON-HOLD PART OF DIGITAL SWITCH ZTN78 TIP RING LINE CP OR TN742 ANALOG LINE CP MULTILINE VOICE TERMINALS (7300H-TYPE) — — — — — — — — DIRECT TRUNK ATTENDANT CONSOLE (7305H02B) OR SWITCHED LOOP ATTENDANT CONSOLE (7305H04C) — — — — — — — ATTENDANT DIRECT EXTENSION SELECTOR CONSOLE (MODEL 23A1) ZTN79 ATL LINE
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, SMD, CAS (ON-PREMISES SWITCHED CONNECTION) — — — — — — Z3A1/4 ADU TN726 DATA LINE CP Z3A4 ADU — — — — — — — — — SAT, SMDR, CAS (OFF-PREMISES DIRECT CONNECTION) — MODEM CO (212-TYPE) — — — — — — — — SAT, SMDR, CAS (OFF-PREMISES SWITCHED CONNECTION) † MODEM (212-TYPE) CO — — — — TN726 DATA LINE C
PART OF DIGITAL SWITCH DATA TERMINAL EQUIPMENT, HOST COMPUTER RS-232C Z3A1/2/4 ADU SINGLE-LINE VOICE TERMINAL (2500-TYPE OR 7101A) DATA TERMINAL EQUIPMENT, HOST COMPUTER TN726 DATA LINE CP TN742 ANALOG LINE CP OR ZTN78 TIP RING LINE CP RS-232C TN726 DATA LINE CP Z3A5 ADU MULTILINE VOICE TERMINAL (7300H-TYPE) — ZTN79 ATL LINE CP ZTN76 GROUND START TRUNK CP OR ZTN77 LOOP START TRUNK CP CO, FX, WATS — — — — PAGING EQUIPMENT DID TRUNKS TN753 DID TRUNK CP TIE TRUNKS TN760B TIE TRUNK CP TIME DIVISIO
Eight port circuits are provided on most port circuit packs. The Multibutton Electronic Telephone (MET) Line, Tie Trunk, and Auxiliary Trunk Circuit Packs each contain four port circuits. The port circuits provide an interface between terminals/trunks and the TDM bus. The number of port circuit packs required varies according to customer requirements and equipment configuration. Each of the System 25 port circuit packs contain a number of common elements (see Figure 3-7) as well as the unique port circuits.
The NPEs do switching network functions for the port circuits. Under control of the onboard microprocessor, an NPE can connect a port circuit to any one of the TDM bus time slots. More specifically, it allows a port circuit to talk on one time slot and listen to the same time slot (NPE sidetone) and on up to four other time slots at the same time. In 2wire circuits that provide their own sidetone, the NPE sidetone is not used.
Ground Start Trunk (ZTN76) The Ground Start Trunk Circuit Pack interfaces eight central office trunks and the TDM bus. Figure 3-8 shows the following Ground Start Trunk unique circuitry: ● Ground detector circuit ● Port Input/Output (I/O) circuit ● Eight port circuits. Ground Detector Circuit: The ground detector circuit determines if ground has been applied to the tip lead for incoming seizure. It also senses tip ground on outgoing seizure indicating dial tone is present.
PORT CIRCUIT 0 T.O CODEC NPE O HYBRID ● NPE 1 ❘ ❘ ❘ ● ON-BOARD MICROPROCESSOR PORT 1/0 CIRCUIT ● ● ● PORT CIRCUIT 4 ● GROUND DETECTOR PORT CIRCUIT 3 ● ❘ ❘ ❘ PORT CIRCUIT 7 Figure 3-8. Unique Ground Start Trunk (ZTN76) Circuitry 3-17 \ R.O T.3 R.3 TO CENTRAL OFFICE T.4 R.4 T.7 R.
Loop Start Trunk (ZTN77) The Loop Start Trunk Circuit Pack interfaces eight central office loop start trunks and the TDM bus. Figure 3-9 shows the following Loop Start Trunk unique circuitry: ● Port Input/Output (I/O) circuit ● Eight port circuits. 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.
PORT CIRCUIT o T.O CODEC HYBRID \ R.O ● NPE O ❘ NPE 1 ❘ ❘ ON-BOARD MICROPROCESSOR PORT I/O CIRCUIT ● ● PORT CIRCUIT 3 T.3 R.3 TO CENTRAL OFFICE T.4 ● ● ● ● PORT CIRCUIT 4 ❘ ❘ ❘ PORT CIRCUIT 7 R.4 T.7 R.7 / Figure 3-9.
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 3-10 shows the following Tip and Ring Line unique circuitry: ● Ringing application circuit ● Port Input/Output (I/O) circuit ● Eight port circuits. PORT CIRCUIT 0 CODEC ❘ ❘ ❘ ❘ NPE 1 PORT I/O CIRCUIT ● ● ● R.O T.3 R.3 TO ANALOG TIP/RING TERMINALS T.4 ● PORT CIRCUIT 4 ● ● ● ❘ ❘ ❘ ● –48V TO –24V POWER CONDITIONER T.
Ringing Application Circuit: This circuit receives ringing voltage from the power supply. It monitors ringing voltage and current and generates signals to the on-board microprocessor indicating zero ringing voltage and current. It also detects when a terminal user has lifted the receiver during ringing preventing the application of ringing to the terminal’s handset receiver.
ATL Line (ZTN79) The ATL I,ine Circuit Pack interfaces eight hybrid voice terminal (7300H series) lines and the TDM bus. It terminates three pairs of wires from each terminal: analog voice pair, digital control pair, and power pair. Figure 3-11 shows the following ATL Line unique circuitry: ● Protocol handler ● Eight port circuit.
PORT CIRCUIT o ANALOG PORT T.O CODEC HYBRID ISOLATION TRANSFORMER R.O \ / NPE 0 ● \ DATA TRANSCEIVER PROTOCOL HANDLER ON-BOARD MICROPROCESSOR ON-BOARD MICROPROCESSOR ● ELECTRONIC POWER FEED / ● \ PORT CIRCUIT 3 ● PORT CIRCUIT 4 ● NPE 1 / ● PXT.0 PXR.0 PXR.1 / ● TXR. O PXT.1 ❘ ❘ ❘ \ TXT. O ● T.3 R.3 TXT.3 TXR .3 PXT .3 PXR.3 TO MULTILINE VOICE TERMINALS T.4 R.4 TXT .4 TXR.4 PXT.4 PXR.4 ❘ \ ❘ ❘ PORT CIRCUIT 7 T.7 R.7 TXT.7 TXR .7 PXT.7 PXR.7 / Figure 3-11.
Data Line (TN726) The Data Line Circuit Pack interfaces eight Asynchronous Data Units (ADUs) data devices and the TDM bus. The ADUs are typically, in turn, connected to RS-232 type devices. Figure 3-12 shows the Data Line unique circuitry that includes: ● A bit clock ● Bus isolation ● Eight port circuit. Bit Clock: The bit clock circuitry is used to provide the Octal Asynchronous Terminal Mode Two EIA Asynchronous LSIs (OATMEALs) with a clock frequency that is a multiple of each baud rate.
A / PORT CIRCUIT 0 ASYNCHRONOUS DATA UNIT (ADU) PROTOCOL HANDLER (OATMEAL) ● PXT.O PXR.0 TXT.0 TXR.0 \ NPE 0 ● \ ● A PORT CIRCUIT 1 A PORT CIRCUIT 2 A PORT CIRCUIT 3 A PORT CIRCUIT 4 A PORT CIRCUIT 5 ● ON-BOARD MICROPROCESSOR ● ● ● / ● NPE 1 BUS ISOLATION ● \ ● TO ADUs ● ● ● ● ● ● ● BIT CLOCK ● A ● PORT CIRCUIT 6 ● A PORT CIRCUIT 7 PXT.7 PXR.7 TXT.7 TXR.7 / Figure 3-12.
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 3-13. Port Circuits: The four port circuits are identical. Each port circuit consists of an analog port, a digital port, and an electronic power feed device. The analog port circuit consists of a codec, a hybrid circuit, an electronic battery feed, and a power filter.
PORT CIRCUIT 0 \ NPE ANALOG PORT ● T.O R.O BT.O DIGITAL PORT LT.O LR.O TO MET TERMINALS ELECTRONIC POWER FEED ● ON-BOARD MICROPROCESSOR BR.O ❘ ❘ ❘ ● PORT CIRCUIT 3 ● T.3 R.3 BT.3 BR.3 LT.3 LR.3 / Figure 3-13.
Analog Line (TN742) The Analog Line Circuit Pack interfaces eight analog voice terminal lines and the TDM bus. Figure 3-14 shows the following Analog Line unique circuitry: ● Ringing application circuit ● Port Input/Output (I/O) circuit ● Eight port circuits.
Ringing Application Circuit: This circuit receives ringing voltage from the power supply. It monitors ringing voltage and current, generates signals to the on-board microprocessor indicating zero ringing voltage and current, and detects a terminal user lifting the receiver during ringing. This prevents the application of ringing to the port circuit when a terminal user lifts the receiver during the ringing phase. Maintenance circuitry is also included.
DID Trunk (TN753) The DID Trunk Circuit Pack interfaces eight central office trunks arranged for Direct Inwrd Dialing ((DID) and the TDM bus. Figure 3-15 shows the following DID Trunk unique circuitry: ● Port Input/output (1/0) circuit ● Eight port circuits. 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.
PORT CIRCUIT 0 TRUNK INTERFACE UNIT T.O CODEC NPE O \ HYBRID R.O ● NPE 1 ❘ ❘ ❘ ON-BOARD MICROPROCESSOR PORT I/O CIRCUIT ● ● ● PORT CIRCUIT 3 T.3 R.3 TO CENTRAL OFFICE ● ● ● ● PORT CIRCUIT 4 ❘ ❘ ❘ PORT CIRCUIT 7 T.4 R.4 T.7 R.7 / Figure 3-15.
Tie Trunk (TN760B) The Tie Trunk Circuit Pack 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 RI pair receive analog signals from the tie trunk. The E and M pair are dc signaling leads used for call setup handshaking. The E lead receives signals from the tie trunk and the M lead provides signals from the circuit pack.
\ NPE ● ON-BOARD MICROPROCESSOR PORT I/O CIRCUIT T.O R.O T1.0 R1.O E.O M.0 PORT CIRCUIT 0 ● ❘ ❘ GROUND DETECTOR ❘ ❘ ● TO TIE TRUNKS T.3 R.3 T1.3 R1.3 E.3 M.3 PORT CIRCUIT 3 / Figure 3-16. Unique Tie Trunk (TN760B) Circuitry UNPROT . 0 0 0 0 0 0 0 0 PORT: 4 3 2 1 PROT . / SMPLX SMPLX E&M SMPLX PORT 2 PORT 3 PORT 4 E&M SMPLX E&M PORT 1 E&M Figure 3-17.
TABLE 3-B. Signaling Type Summary SIGNALING TYPE I Std. I Compat. V RECEIVE OFF-HOOK ON-HOOK grd open/bat (*) grd open/bat (*) grd open TRANSMIT ON-HOOK OFF-HOOK bat grd grd open/bat (*) grd open * An open circuit is preferred over voltage. TABLE 3-C.
Auxiliary Trunk (TN763) The Auxiliary Trunk Circuit Pack interfaces four ports provided for client-provided 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.
\ ON-BOARD MICROPROCESSOR PORT CIRCUIT 0 ● NPE PORT I/O CIRCUIT ● GROUND DETECTOR ● I I I I I ❘ PORT CIRCUIT 3 T.O R.O S.0 S1.0 SZ.0 SZ1.0 TO AUXILIARY EQUIPMENT T.3 R.3 S.3 S1.3 SZ.3 SZ1.3 / Figure 3-18.
STARLAN Interface (ZTN84) (V2) The STARLAN Interface (ZTN84) is a System 25 circuit pack (CP) designed to function as either a gateway or a bridge between the PBX and the AT&T STARLAN NETWORK. The ZTN84 contains much of the circuitry common to the other CPS in the system, that is a Sanity and Control Interface (SAKI), a Network Processing Element (NPE), and a 8031 microprocessor.
System Resources The System Resource Circuit Packs (CP) are as follows: ● Service Circuit (ZTN85) ● Tone Detector (TN748) ● Pooled Modem (TN758). Service Circuit (ZTN85) The Service Circuit CP provides the clock signals of the system. It also generates and receives tones.
generator and time slot table circuits with the TDM bus. Tone Generator: The tone generator consists of a digital signal processor (DSP), a counter, and a dual-port tone RAM. The DSP operates at 10 MHz and produces .24 different tones. The dual-port tone RAM stores these tones in 24 different addresses. The counter under control of the tone clock causes the DSP to transmit one sample of each tone every 8kHz. The counter is synchronized to the TDM bus and is offset to provide delay needed for access time.
TONE GENERATOR (DSP) TIME SLOT TABLE (DPRAM) TONE TABLE (DPRAM) TDM BUS LEADS BUS BUFFER ● CIRCUIT PACK ADDRESS LEADS LEDs SAKI ● ● RAM ● ● U-CONTROL NETWORK BUS RED YELLOW GREEN ADDRESS & DATA BUS ● ● TONE DETECTORS NPE SYSTEM CLOCK Figure 3-19.
Tone Detector (TN748) 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. The Tone Detector CP consists of the same common circuitry as the intelligent port circuits and the following unique circuits (see Figure 3-20): ● Port I/O circuit ● Port or DSP Sanity check circuit ● Four touch-tone port circuits ● Two general purpose tone detector ports ● Two NPE loop-around test ports.
\ / ● ❘ TDM BUS LEADS ● NPE 0 BUS BUFFERS ❘ ● ❘ \ ● PORT CIRCUIT 0 PORT CIRCUIT 3 NPE 1 PORT CIRCUIT 7 ● PORT CIRCUIT 1 ● PORT CIRCUIT 4 ● PORT CIRCUIT 5 ● RAM ● ● / ❘ ❘ CIRCUIT PACK ADDRESS LEADS SAKI ❘ / \ ● ON-BOARD MICROPROCESSOR PORT I/O CIRCUIT / ● \ ● ● RED SANITY CHECK CIRCUIT GREEN LEDS TOUCH-TONE PORTS YELLOW ● PORT CIRCUIT 2 GENERAL PURPOSE TONE DETECTOR PORTS PORT CIRCUIT 6 \ / Figure 3-20.
Pooled Modem (TN758) The Pooled Modem Circuit Pack supports 0-300 and 1200 bits per second (bps) data speeds and provides the following: ● Circuitry to provide a signal compatible with the modulation formats of the 212series modems ● Modem emulation (see below) Capability 0-300 Asynchronous 300 Asynchronous 1200 Asynchronous ● Data Module Mode Low 300 Asynchronous 1200 Asynchronous Modem control functions corresponding to 212A-series modem operations.
Common Circuitry: The Pooled Modem common circuitry that includes all circuitry shown on Figure 3-21 except the Conversion Resource circuitry provides the same general function as the intelligent port common circuitry.
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 Call Processor and Memory Circuit Packs (that are collectively referred to as the Common Control circuitry), and in the 8-bit on-board microprocessors located in the port and service circuits.
Traffic load, defined as the sum of static and dynamic loads, is a function of the number of features that are executed, the frequency with which they are executed, the system configuration, and the instantaneous (peak) call processing load. The configuration contribution to load is known as dynamic load. The static load consists of maintenance and audit routines. Software Partitioning System 25 software is comprised of various modules, each supporting a particular process.
Error Logger: Prioritizes and stores system errors. The errors are stored in three error records (located in System RAM), that are: Permanent System Alarms ● ● Transient System Errors ● Most Recent System Errors. The Error Logger lights the Alarm LED (located on the Attendant Console) when a serious error is detected.
` FEATURE CODE MODULES / MEMORY CIRCUIT PACK — — — — ADMINISTRATION (TASK) — — — — — ▲ — — — ▼ STATION CALL PROCESSING (TASK) ▲ — — — — — ▼ SYSTEM RAM CALL PROCESSOR CIRCUIT PACK ▲ ▼ OPERATING ● ● — \ ● SMDR PROCESSING (TASK) — — — — — — — ERROR LOGGER MESSAGE SEND/RECEIVE SYSTEM ▲ ▼ ▼ ARCH ANGEL RS-232C DRIVER DRIVER INTERFACE INTERFACE ▲ ▲ ▼ NETWORK CONTROL SOFTWARE ▲ — — — — — — CONTROL ❘ CHANNEL ❘ MESSAGES — — — — — —❘ ▲ — — — — — — — — — — — — TDM BUS — —
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. If so, two available time slots are reserved for the connection. 7. The task sends downlink messages to the port circuit via the OS. The messages instruct the port circuit to listen for dial tone on a specified time slot and to light the call appearance status LED on the terminal. 8.
LIST OF FIGURES Figure 4-1. System 25 Figure System Cabinet Figure 4-3. System Circuit 4-2. Cabinets (J58901A)—Three . . . . 4-2 . . . . . . 4-3 . . . . . . . . 4-5 Figure 4-4. Model 2500 Series (Analog) Voice Terminals . . . . . . . . . . 4-14 Figure 4-5. Model Figure 4-6. 420 Figure 4-7. 5-Button Figure 10-Button Voice Terminal (7303H01D) 34-Button Voice Terminal (7305H01D) 7101A (Analog) Speakerphone Voice Voice Voice Terminal . . . .
Figure 4-29. Typical ADU Connections—Supporting Data Terminal And 7300H Series Multiline Voice Terminal . . . . . . . . . . . . . . . . . 4-60 Figure . 4-61 Figure 4-31. Z3A1/2/4 ADU Local Power Connections . . . . . . . . . . . 4-62 4-30. Typical MADU Connections . . . . . . . . . . . . . . . LIST OF TABLES TABLE 4-A. Total Port TABLE 4-B. System TABLE 4-C. Summary Circuit Circuit Packs . . . . . . . . . . . . . 4-6 . . . . . . . . . . . . .
SECTION 4—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 and CPs. ● Terminal Equipment: Equipment that can be connected to voice or data station ports. ● Peripheral Equipment: Equipment that can be connected to the Call Processor CP. ● Auxiliary Equipment: Service- and feature-related supporting equipment.
The front cover of the cabinet is secured by four screws. These screws must be loosened slightly before the cover can be removed. When removed, access is provided to the CPs, a replaceable air filter mounted just under the CP carrier frame, and two cooling fans. The cooling fans are mounted on an assembly that, when unscrewed, provides access to the power supply. Air intake is at the bottom of the cabinet and exhaust is vented at the left side of the front cover.
Each cabinet has its own power supply mounted to the left of the CP carrier. The power supply is 3 inches wide and weighs about 9 pounds. Voltage and current supplied to the carrier are: +5 V dc at 35A, -5 V dc at 3A, -48 V dc at 3A, and 90 V ac at 0.16A. On the front of the supply is a green Light Emitting Diode (LED) that, when lighted, indicates that the +5 V de is available and within limits.
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 (eg., 50 to 60 stations and 10 to 15 trunks). It contains a Memory and Call Processor that together are referred to as the Common Control (CC), a Service Circuit, and up to 9 port CPs. The Memory, Call Processor, and Service Circuit must be mounted in CP slots 1, 2, and 3, respectively.
CIRCUIT PACK SLOTS 1 2 3 5 4 6 7 8 9 10 11 12 PORT CIRCUITS POWER SERVICE CIRCUIT CALL PROCESSOR (a) CABINET 1 - (MOUNTING FOR 3 CONTROL & 9 PORT CIRCUIT PACKS) CIRCUIT PACK SLOTS 1 2 3 4 POWER SUPPLY 5 6 7 8 9 10 11 12 PORT CIRCUITS (b) CABINET 2 OR 3 - (MOUNTING FOR 12 PORT CIRCUIT PACKS) NOTES : 1. REFER TO TECHNICAL SPECIFICATIONS, SECTION 8 FOR CIRCUIT PACK UNIT LOAD INFORMATION. 2. DIVIDE THE TOTAL NUMBER OF VOICE TERMINAL AND TRUNK CIRCUIT PACKS BETWEEN THE CABINETS USED.
TABLE 4-A. Total Port Circuit Packs Per System NUMBER OF CABINETS CABINET NUMBER * PORT CIRCUIT PACKS TOTAL PORT CIRCUIT PACKS † 1 Cabinet 1 9 9 2 Cabinet 1 9 21 Cabinet 2 12 Cabinet 1 9 Cabinet 2 12 Cabinet 3 12 3 33 * Cabinet 1 (always required)—Provides mounting for Memory, Call Processor, Service Circuit, and Port CPs including Tone Detectors and Pooled Modems. Cabinet 2 and 3 (Optional)–Provides mounting for Port CPs including Tone Detectors and Pooled Modems.
Circuit Packs Required Circuit Packs: The following CPs are provided with all systems and must be mounted in Cabinet 1: ● ZTN82 (V1) or ZTN128 (V2) Call Processor The ZTN82 or ZTN128 (one per system) provides a central processing unit, RandomAccess Memory (RAM) (memory) for call and feature processing, interrupt controller, programmable timers, real time clock, status display, processor bus interface, and four interface ports.
● TN758 Pooled Modern Provides two integrated 212-modem compatible conversion resources for switched connections between analog endpoints (modems), or a digital endpoint and an analog endpoint. A maximum of two TN758s (4 conversion resources) is permitted in each cabinet. 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.
Trunk Port Circuit Packs ● TN753 DID Trunks Provides eight ports for immediate-start or wink-start Direct Inward Dialing (DID) trunks. ● TN760B Tie Trunks 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.
Circuit Pack Features All system CPs have the following features: ● Solid-state circuitry mounted on 7.6 by 14.
Table 4-B lists CPs that can be used with System 25. A description of each CP is provided in Section 3, Functional Description. TABLE 4-B.
Terminal Equipment Terminal equipment is connected to System 25 station (voice or data) ports. It is made up of the following groups: ● Voice Terminals — Single-Line — Multiline (MERLIN sets and MET sets) ● Voice Terminal Adjuncts ● Attendant Consoles ● Asynchronous Data Units (for interface with data terminals). This subsection provides information on all components in each group or contains references to the Section where information can be found.
TABLE 4-C.
Model 2500 Series Each of the following Model 2500 voice terminals come equipped with: ● Handset ● Touch-Tone Dial (Dual Tone Multifrequency - DTMF) ● Ringer Volume Control. Several 2500 series voice terminals are shown in Figure 4-4. Supported 2500 series sets include the following: ● Model 2500 DMGC—Desk Set with message waiting indicator and Recall button for timed switchhook flash ● Model 2500MMGB—Basic desk set ● Model 2500 SM—Basic desk set that can be used with a 4A Speakerphone.
Model 7101A (MD) (PEC 3170-00M) The Model 7101A (Figure 4-5) is about 2-3/4 inches wide, 3-1/2 inches high, and 8-1/2 inches long. 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.
420 Speakerphone (V2) The 420 Speakerphone (Figure 4-6) is a single-line voice terminal that can be desk or wall mounted. This set comes equipped with the following: ● Handset ● Touch-Tone ● Built-In Speakerphone ● ● Dial Twelve Memory Buttons—Where emergency numbers and frequently called numbers can be stored for quick calling. Six Fixed Feature Buttons — Program—For entering the memory button programming mode. — Redial—For recalling the last number dialed.
MEMORY BUTTONS PROGRAM BUTTON REDIAL BUTTON FLASH BUTTON HOLD BUTTON AND LAMP SPEAKERPHONE BUTTON AND LAMP MUTE BUTTON VOLUME CONTROL SPEAKER VOLUME CONTROL RECEIVER VOLUME CONTROL Figure 4-6.
TABLE 4-D.
Multiline Voice Terminals The system supports MET (10- and 12-button only) and MERLIN (7300H Series) multiline voice terminals. Multiline voice terminals have two LEDs located beside each assignable button (except for the 34-button basic set). The LEDs are referred toas I-Use (red) and Status (green) LEDs. Additional information on the LEDs is provided in the “Line Status and I-Use Indications” feature description in Section 2. Most multiline voice terminals support adjuncts.
5-Button Voice Terminal (7302H01D) PEC 3160-111 The 5-Button Terminal (Figure 4-7) can be desk or wall mounted and is about 5-3/4 inches wide, 5-1/4 inches high, and 8-1/2 inches long.
I-USE/STATUS LEDs HANDSET SYSTEM ACCESS TEST/PROGRAM SWITCH PROGRAMMABLE FEATURE BUTTONS SPEAKER/RING VOLUME CONTROL SWTICH ❑ CONFERENCE ❑ TRANSFER ❑ DROP ❑ HOLD TOUCH DIAL PAD RECALL SPEAKER Figure 4-7.
10-Button Voice Terminal (7303H01D) PEC 3161-172 The 10-Button Terminal (Figure 4-8) can be desk or wall mounted and is about 7 inches wide, 5-1/4 inches high, and 8-1/2 inches long.
I-USE/STATUS LEDs SYSTEM ACCESS (2) PROGRAMMABLE FEATURE BUTTONS (3) TEST/PROGRAM SWITCH PROGRAMMABLE FEATURE BUTTONS (5) HANDSET TOUCH DIAL PAD ❑ CONFERENCE ❑ TRANSFER ❑ DROP ❑ HOLD SPEAKER/RING VOLUME CONTROL SWITCH SPEAKER RECALL MESSAGE Figure 4-8.
34-Button Voice Terminal (7305H01D) (MD) PEC 3162-412 The 34-Button Terminal (Figure 4-9) can be desk or wall mounted and is about 10-1/4 inches, 5-1/2 inches high, and 8-1/2 inches long. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
I-USE/STATUS LEDs HANDSET SYSTEM ACCESS (2) PROGRAMMABLE FEATURE BUTTONS (3) TEST/PROGRAM SWITCH PROGRAMMABLE FEATURE BUTTONS (29) TOUCH DIAL PAD SPEAKER/RING VOLUME CONTROL SWITCH MESSAGE SPEAKER RECALL ❑ CONFERENCE ❑ TRANSFER ❑ DROP ❑ HOLD Figure 4-9.
34-Button Deluxe Voice Terminal (7305H02D) PEC 3162-417 The 34-Button Deluxe terminal (Figure 4-10) is available for general use and as a Direct Trunk Attendant Console. The voice terminal is about 10-1/4 inches wide, 5-l/2 inches high, and 8-1/2 inches long.
default assignments. † On the primary 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 secondary Console, these buttons do not receive default assignments. Adjuncts: ● 502A ● S102A Headset Adapter Speakerphone (PEC3164-HFA) (PEC3163-HFU).
Built-In Speakerphone (BIS) Voice Terminal (7305H03B) PEC 3162-BIS The BIS voice terminal (Figure 4-10) can be desk or wall mounted and is about 9-1/2 inches wide, 5-1/4 inches high, and 9-1/4 inches long.
I-USE/STATUS LEDs HANDSET SYSTEM ACCESS (2) PROGRAMMABLE FEATURE BUTTONS (3) PROGRAMMABLE FEATURE BUTTONS (29) TEST/PROGRAM SWITCH TOUCH DIAL PAD SPEAKER/RING VOLUME CONTROL SWITCH RECALL SPEAKERPHONE VOLUME CONTROL HFAI MESSAGE SPEAKERPHONE MICROPHONE CONFERENCE DROP ❑ TRANSFER ❑ HOLD ❑ ❑ Figure 4-11.
Built-In Speakerphone (BIS) Voice Terminal With Display (7305H04C) PEC 3162DIS (V2 only) The BIS Voice Terminal with Display (Figure 4-12) is available for general use and as a Switched Looped Attendant Console (SLAC). In general use, it can be desk or wall mounted; as a console it is normally desk mounted. The terminal is about 9-1/2 inches wide, 5-1/4 inches high, and 9-1/4 inches long.
For Use as a Switched Loop Attendant Console: — Five predefined as loop buttons — Twelve other predefined (Inspect, Attendant Message Waiting, Alarm, Local, Scroll, Forced Release, Start, Source, Release, Destination, Cancel, Join) — Seventeen programmable (defaulted as Flex DSS [15], Position Busy [1], and Last Number Dialed [1]) Note: The programmable buttons without LEDs should not be programmed for features that require I-Use and Status LEDs.
Hands-Free-Answer On Intercom (HFAI) Voice Terminal (7309H01B) PEC 3161-161 The HFAI voice terminal (Figure 4-13) can be desk or wall mounted and is about 6-1/4 inches wide, 5-1/4 inches high, and 9 inches long.
I-USE/STATUS LEDs HANDSET SYSTEM ACCESS (2) PROGRAMMABLE FEATURE BUTTONS (3) TEST/PROGRAM SWITCH TOUCH DIAL PAD PROGRAMMABLE FEATURE BUTTONS (5) SPEAKER/RING VOLUME CONTROL SWITCH CONFERENCE DROP MESSAGE RECALL ❑ TRANSFER HOLD ❑ ❑ ❑ HFAI MICROPHONE ❑ SPEAKER ❑ ❑ Figure 4-13.
Ten Button Multibutton Electronic Telephone (MET) (2991 C/D05) The Ten Button MET set (Figure 4-14) 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.
TOUCH TONE DIAL PAD HANDSET SYSTEM ACCESS PROGRAMMABLE FEATURE BUTTONS MESSAGE WAITING DROP CONFERENCE TRANSFER HOLD RECALL BUTTON INDICATOR LAMPS Figure 4-14.
Ten Button MET With Built-In Speakerphone (2993C04) The 10-Button MET set with BIS (Figure 4-15) can be desk or wall mounted. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support Systcrn (DOSS) Configurator.
TOUCH TONE DIAL PAD SYSTEM ACCESS PROGRAMMABLE FEATURE BUTTONS HANDSET ON/QUIET BUTTON ON LAMP SPEAKERPHONE OFF BUTTON RECALL BUTTON INDICATOR LAMPS VOLUME CONTROL / ❑ MESSAGE WAITING ❑ DROP ❑ CONFERENCE ❑ TRANSFER ❑ HOLD \ Figure 4-15.
Twelve Button MET Set (7203M) The 12-Button MET set (Figure 4-16) 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) Configuator.
I-USE/STATUS LEDS ❑ HOLD ❑ TRANSFER ❑ CONFERENCE ❑ DROP ❑ MESSAGE ❑ (PROGRAMMABLE) ❑ (PROGRAMMABLE) ❑ (PROGRAMMABLE) ❑ SYSTEM ACCESS ❑ SYSTEM ACCESS HANDSET TOUCH TONE DIAL PAD TONE RINGER VOLUME CONTROL DISCONNECT RECALL Figure 4-16.
Multiline Voice Terminal Connection Information Detailed connection information is provided in the following figures: ● Figure 4-24—On-Premises 7300H Series Multiline Voice Terminal Connections ● Figure 4-25—Off-Premises 7300H Series Multiline Voice Terminal Connections ● ● Figure 4-26—Ten Button MET Set Connections Figure 4-27—Stand-Alone Remotely Powered Voice Terminal Connections Descriptions of the Station Interconnect Panel (SIP), Trunk Access Equipment (TAE), and associated cables and adapters,
Voice Terminal Adjunct Connection Information Detailed adjunct connection information is provided in Section 2 with the detailed feature descriptions of the headset adapter and speakerphone adjuncts. Descriptions of the Station Interconnect Panel (SIP), Trunk Access Equipment (TAE), and associated cables and adapters, as shown on the figures, are provided under the heading “Connectivity’’ later in this Section.
Asynchronous Data Units (AD US) Asynchronous Data Units, and Multiple Asynchronous Data Units (MADUs), provide an interface between ports on the TN726 Data Line CP and RS-232C 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.
RS-232C CONNECTOR INTERFACE TELEPHONE JACK WALL JACK OPTIONAL ORIGINATE/DISCONNECT SWITCH Figure 4-17.
TABLE 4-F. 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 m o d j a c k f o r h y b r i d s e t . Requires KS-22911-L1 power unit and D6AP cord. MADU 2169-005 Self-powered.
Peripheral Equipment Peripheral Equipment is equipment that connects to the Call Processor (ZTN82 or ZTN128) CP, including: ● 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” in Section 2. Auxiliary Equipment Auxiliary equipment supports System 25 features and services.
AC Power Line Surge Suppressor The TII Model 428 Self-Restoring Powerline Surge Suppressor (PEC 8310-001, Comcode 402988950) protects against electrical surges, spikes, and transients that can cause damage to the System 25 power supply. A pilot light indicates that full protection is present. The unit plugs directly into a standard 120-volt 15-amp grounded outlet, providing a dual outlet to protected equipment.
trunk CPs (except Tie Trunk CPs) can be connected to a three-way splitter cable (OR6016) that concentrates the CP interfaces into one 25-pair cable. Up to two Tie Trunk CPs can be connected to a two-way splitter cable (OR6015) that concentrates the CP interfaces into one 25-pair cable. Each splitter cable connects to an interface block at the TAE. Cables are cut down or plug into the TAE blocks and plug into the telephone company provided network interface (RJ21X or RJ2GX).
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.
NOTE BUILDING WIRING RING MODULAR JACK ROW NUMBER COLUMN LETTER BOX 28 1/16” PURSE LOCK CLIP ADAPTER MOUNTING CLIP OCTOPUS CABLE DISTRIBUTION POST NOTE 10” WIDE, 9 1/2” MOUNTING CENTERS WHEN FLANGES ARE OVERLAPPED Figure 4-19.
Figure 4-20 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 (WP90780) from a station CP provides 25-pair connectorized cabling to eight 4-pair modular jacks. Each jack is terminated on the SIP by a 858A Adapter. An octopus cable connects a maximum of eight voice terminals to a port CP.
Connectivity Figures Figures 4-21 through 4-31 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.
SYSTEM 25 CABINET ZTN78 OR TN742 PART OF OCTOPUS CABLE — — — C2 ● — — — — — — — — — PART OF SIP SIP ADAPT. W1 B1 C5 SINGLE-LINE VOICE TERMINAL (NOTE) LEGEND: ZTN78 – TN742 – B1– C2 C5 – W1 – TIP RING CP ANALOG LINE CP TYPICAL-103A CONNECTING BLOCK* OCTOPUS CABLE (WP90780) - PEC 2720-05P MODULAR CORD (D4BU-87) FURNISHED WITH SET 4 PAIR INSIDE WIRING CABLE* NOTE : RANGE LESS THAN 2000 FEET FROM SYSTEM CABINET, USE ZTN-78 CP.
SYSTEM 25 CABINET TN742 ANALOG LINE CP PART OF OCTOPUS CABLE — — — — — — C2 ● — — — EXPOSED CABLE SIP ADAPT.
SYSTEM 25 CABINET TN742 ANALOG LINE CP PART OF OCTOPUS CABLE — — — — — — C2 ● PART OF TAE 700A NETWORK INTERFACE BLOCK (110- OR 66-TYPE) PART OF SIP SIP ADAPT. NETWORK INTERFACE W1 A RJ21X — — — — — — OPS SINGLE-LINE VOICE TERMINAL CENTRAL OFFICE LEGEND: A – SINGLE-ENDED 25 PAIR CABLE (A25D)* C2 – OCTOPUS CABLE (WP90780) - PEC 2720-05P WI -4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER Figure 4-23.
PART OF OCTOPUS CABLE — — — — — — SYSTEM 25 CABINET ZTN79 ATL LINE CP ● LEGEND E1 C1 C2 T1 W1 C2 _ _ _ — — — PART OF SIP SIP ADAPT . W1 B1 VOICE TERMINAL T1 : – TYPICAL-103A CONNECTING BLOCK* – MODULAR CORD (D8W-87) - FURNISHED WITH SET – OCTOPUS CABLE (WP90780) - PEC 2720-05P – 7300H TYPE VOICE TERMINAL – 4 PAIR INSIDE WIRING CABLE* * - FURNISHED BY INSTALLER NOTE: RANGE WITHIN 2000 FEET OF SYSTEM CABINET (LOCAL POWER REQUIRED >1000 FEET). Figure 4-24.
SYSTEM 25 CABINET ZTN79 ATL LINE CP EXPOSED CABLE PART OF OCTOPUS CABLE — — — — — — — — I PART OF SIP SIP ADAPT C2 ● — — — — — — — — — — — — C1 IROB PROTECTION TII 341 IROB PROTECTION TII 341 (NOTE 1) (NOTE 1) W1 B1 C1 LEGEND : B1 C1 C2 D G T1 WI – TYPICAL-103A CONNECTING BLOCK* –MODULAR CORD (D8W-87) - FURNISHED WITH SET –OCTOPUS CABLE (WP90780) - PEC 2720-05P – # 10 AWG GROUND WIRE* – APPROVED BUILDING GROUND – 7300H-TYPE VOICE TERMINAL – 4 PAIR INSIDE WIRING CABLE* VOICE T
SYSTEM 25 CABINET TN735 MET LINE CP PART OF OCTOPUS CABLE — — — C2 ● — — — — — — — — — PART OF SIP SIP ADAPT.
SYSTEM 25 CABINET ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE — — — — — — C2 PART OF SIP 451A ● — — — — — — ADAPT. Z400F ADAPT. C1 SIP ADAPT.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE — — — C2 ZTN78 OR TN742 PART OF SIP ● — — — — — — ADAPT (WP90851-L1) SIP ADAPT M1 Z3A1 ADU B1 — — — C2 TN726 ● — — — RSS232 TERMINAL — — — LEGEND: ZTN78 TN742 TN726 B1 C1 C2 C5 W1 WP90851-L1 Z3A1 ADU - TIP RING LINE CP ANALOG LINE CP DATA LINE CP TYPICAL -103A CONNECTING BLOCK * MODULAR CORD (D8W-87) - PEC 2725-07G OCTOPUS CABLE (WP90780) - PEC 2720-05P MODULAR CORD (D4BU-87) - FURNISHED WITH SET INSIDE WIRING CABLE * MODULAR Y ADAPTER - PEC 2750-T05
SYSTEM 25 CABINET ZTN79 ATL LINE CP TN726 DATA LINE CP PART OF OCTOPUS CABLE — — — C2 PART OF SIP ● — — — — — — — — — C2 ● — — — — Y ADAPT (WP90851-L1) SIP ADAPT.
SYSTEM 25 CABINET MADU TN726 C10 W2 C11/C12 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) C1O – 25-PAIR CENTERFEED-TO-ENDFEED CABLE (PEC 2724-78B) (ALWAYS REQUIRED) Cll – M48C OCTOPUS CABLE (PEC 2724-29G) (7-FOOT CORD WITH EIGHT 6-INCH ARMS FOR "DTE" HOST INTERFACE C 1 2– M48G OCTOPUS CABLE (PEC 2724-98G) (7-FOOT CORD WITH EIGHT 6-INCH ARMS FOR "DCE" HOST INTERFACE F
TO RS-232C DEVICE OPTIONAL SINGLE-LINE AC POWER OUTLET 2012D POWER TRANSFORMER 248B ADAPTER 400B2 ADAPTER D6AP-87 CORD 4-PAIR D8W CORD (PEC 2725-07G) WALL JACK D8AM-87 CROSSOVER CORD (REQUIRED IF THIS ADU IS CONNECTED TO ANOTHER ADU OR ANY OTHER DCE DEVICE, RATHER THAN DLC) NOTE : PEC 21691 includes 2012D transformer, 248B and 400B2 adapters and D6AP cord. Figure 4-31.
SECTION 5—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 are provided for: ● Hardware and Software Parameters ● Unit Loads ● Cable ● Call Progress Tones ● Indicator Lamp Signals ● Port Specifications ● Recommended Network Facilities (Trunks) ● Analog Transmission Characteristics.
Hardware And Software Parameters The following is a listing of maximums for hardware and software parameters.
Hardware And Software Parameters (Contd) TOTAL ITEM Direct Group Calling (DGC) 32 10 Groups Members per group Emergency Transfer Units (ETUs) Voice Terminals per ETU 4 5 Modem Pool Circuit Packs per cabinet Conversion Resources per circuit pack 2 2 Paging Zones 3 Parked Calls (System ) 24 1 8 Per Voice Terminal Attendant DXS Console 16 Trunk Groups System Delay Announcements: Direct Group Calling Delay Announcement Directed Night Service Delay Announcement Account Code Digits SMDR or Call Acco
Hardware And Software Parameters (Contd) TOTAL ITEM Traffic Data ● Simultaneous 2-Party Conversations ● Call Capacity –CCS/Hour –Busy Hour Call Capacity 4140 2500 Reliability ● Mean Time Between Outages (MTBO) 4 Years Power Consumption ● Per Cabinet, Maximum ● Thermal Dissipation 115 500 Watts 1700 BTU/Hour 256 Total Ports - also includes trunk and station ports [Software Limits; hardware maximum = 36 CPs] System Resources ● One Service Circuit CP (includes 4 TT Receivers) (8 ports allocated/CP) ●
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 2500 Voice Terminals 7101A Voice Terminal CIRCUIT PACK UNIT LOAD PER PORT ZTN78 0.5 TN742 1.0 MET Sets TN735 1.0 5-Btn. (7302H01D) 10-Btn. (7303 H01D) 34-Btn. (7305 H01D) HFAI (7309 H01B) ZTN79 1.0 1.0 1.0 1.
Cable Distance Limitations The following specifications provide allowable cabling distances for the following devices: ● Single-Line Voice Terminals ● Multiline Voice Terminals ● Data Terminals (RS-232) Connected to Asynchronous Data Units (ADUs). Single-Line Voice Terminals SUPPORTING CIRCUIT PACK 24-GAUGE WIRE (0.
Multiline Voice Terminals SUPPORTING CIRCUIT PACK ZTN79 (7300H Series– in-building or out-of-building, no off-premises) TN735 (in-building MET Sets only ) 24-GAUGE WIRE (0.5106mm) FEET METERS 2,000 (Note) 610 1,000 305 Note: Requires local power beyond 1,000 feet.
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 ZTN82 OR ZTN128 CALL PROCESSOR CP OR DISTANCE (SEE TABLE) RS-232C DEVICE (ASYNCHRONOUS) TN726 DATA LINE CP ADU Figure 5-3.
Tones The following call progress tones are generated by the system: FREQUENCY PATTERN (In Milliseconds) Busy Tone 480 Hz + 620 Hz 500 on, 500 off; repeated Confirmation Tone 350 HZ + 440 HZ 100 on, 100 off, l00 on, l00 off, l00 on followed by silence Dial Tone 350 HZ + 440 HZ Continuous Reorder Tone 480 Hz + 620 Hz 250 on, 250 off; repeated Ringback Tone 440 Hz + 480 Hz 1200 on, 4000 off; repeated Call Waiting 440 Hz 200 on; not repeated Recall Dial Tone 350 Hz + 440 Hz 100 on, 100 of
Port Specifications The following tables provides interface specifications for System 25 line and trunk port circuits: supported by System 25: DATA TERMINAL PORTS (Note) STATION TYPE EIA RS-232 Device Via ADU CIRCUIT PACK DATA TERMINAL SPECIFICATIONS Data Line (TN726) 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).
Port Specifications (Contd) DATA TERMINALS (Do Not Require Local Power) DATA TERMINAL REQUIRES Z3A1 or Z3A2 ADU AT&T 4410 4415 51OA X X X ADMs 3A 31 X X ADDS Viewpoint * X ConCept HDS 108 REQUIRES Z3A4 ADU X Datamedia Elite 1521 X Hazeltine 1510 X Hewlett Packard 2621A 2623A 2640 2645 2645A X X X X X Teletype BLIT/1 (68000 based) 5620 (MAC-80 based) 5420 X X X * Requires Originate/Disconnect Switch.
Port Specifications (Contd) VOICE TERMINAL PORTS STATION TYPE Tip and Ring Single-Line Sets (Analog) Tip and Ring Single-Line Sets (Analog) SPECIFICATIONS CIRCUIT PACK Tip Ring Line (ZTN78) Analog Line (TN742) 5-12 ● l-Pair Interface (Tip and Ring) ● Analog signals modulated over DC loop ● Loop Voltage: 24 V dc ● Signaling: Dual Tone Multifrequency (DTMF) only ● REN (max.): 1.2 ● DC Current (max.
Port Specifications (Contd) VOICE TERMINAL PORTS (Contd) STATION TYPE MET Sets (Hybrid) MERLIN® Sets (7300H Series) (Hybrid) SPECIFICATIONS CIRCUIT PACK MET Line (TN735) ATL Line (ZTN79) 5-13 ● 3-Pair Interface l-Voice pair 2-Control pairs ● Analog Voice, Digital Control/Signaling ● Power: Phantom Power Over Data Pairs ● Bipolar Signaling With O V de Offset ● 1 MHz Nominal Signaling Rate ● Loop Range: 1000 feet (In-Building service only) ● 3-Pair Interface l-Voice pair l-Control pair l-P
Port Specifications (Contd) TRUNK PORTS TRUNK TYPE CIRCUIT PACK Auxiliary Trunk TN763 Direct Inward Dialing (DID) Trunk Tie Trunk TN753 TN760B 5-14 SPECIFICATIONS ● Capacity: 4 Circuits ● 3-pair interface: Voice (T,R), Signaling (S, S1), Status (SZ, SZ1) ● Capacity: 8 Circuits ● 2-Wire (600 Ohm Fixed Impedance) Transmission ● Signaling: Wink Start, Delay Dial, or Immediate Dial.
Port Specifications (Contd) TRUNK PORTS TRUNK TYPE CIRCUIT PACK Ground Start Trunk ZTN76 Loop Start Trunk ZTN77 5-15 SPECIFICATIONS ● Capacity: 8 Circuits ● 2-Wire (600 Ohms or RC Balance) Transmission ● Network Signaling: Ground Start ● Two-way or Incoming only Service ● Capacity: 8 Circuits ● 2-Wire (600 Ohms or RC Balance) Transmission ● Network Signaling: Loop Start ● Two-way or Incoming only Service
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.
Analog Transmission Characteristics Frequency Response: (Station-To-Station or Station-To-CO-Trunk, relative to loss at 1 kHz) FREQUENCY 60 Hz 200 Hz 300-3000 Hz 3200 Hz 3400 Hz LOSS >20 dB <5 dB <1 dB <1.
Analog Transmission Characteristics (Contd) 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. Loop Resistance: ● TN74.
SECTION 6—ENVIRONMENTAL REQUIREMENTS This section provides information on floor and wall space requirements for System 25 Also included are specifications for cabinets and associated peripheral equipment. 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 growrth. A typical floor plan is shown in Figure 6-1.
BACKBOARD TERMINATION FIELD (NOTE 4) SYSTEM CABINETS (FOOTPRINT) TABLE FRONT NOTE 3 NOTES: 1. 115V AC, 60 Hz, 15 AMP OUTLETS (HUBBELL 5262 OR EQUIVALENT) MUST BE LOCATED WITHIN SIX FEET (1.8 m) OF SYSTEM CABINETS. 2. MULTIPLE CABINET SYSTEMS TWO QUAD OUTLETS, SINGLE SYSTEMS REQUIRE ONE QUAD REQUIRE CABINET OUTLET. 3. ALLOW AT LEAST 24 INCHES OF SPACE IN FRONT OF CABINETS. TABLE MUST BE ABLE TO SUPPORT 250 POUNDS. 4. BACKBOARD IS 3/4 INCHES THICK BY 48 INCHES WIDE BY 72 INCHES LONG Figure 6-1.
QUAD AC OUTLETS Figure 6-2.
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 three 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.
Air Purity The cabinet should not be installed in an area where the air may be contaminated with any of the following: ● Excessive dust, lint, carbon particles, paper fiber contaminants, or metallic 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 Lighting I.
AC Power Requirements ● The System 25 power service shall equipment served (See Figure 6-3. ) be a dedicated branch circuit with no other ● Each cabinet requires 500 Watts at 115V ac (maximum) ● 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-B015 typical ). Each breaker is to protect 2 associated wall mounted 115 V ac, 15 AMP, receptacles (HUBBELL 5262 typical).
TWO SEPARATELY FUSEO 15 AMP CIRCUITS GROUND (GREEN) ITE: QP1 - B015 TWO 15 AMP CKT BAKA OR APPROVED EQUIVALENT LOAD CENTER 4“ BOX (RACO 230 OR EQUIVALENT) HUBBELL RECPTS. (5262 15 AMP OR EQUIVALENT) NEUTRAL INSULATED FROM LOAD ENTER 4“ COVER (RACO 807 OR EQUIVALENT) SINGLE POINT GROUND GROUND BAR MOUNTED ON 4“ BOX (SQUARE D PK9GTA OR APPROVED EQUIVALENT) \ / TO 240 VAC 30 AMP. SINGLE PHASE MAIN Figure 6-3.
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 l/2 inch in diameter, that is connected to an underground metal water pipe that is in direct contact with earth for 10 feet or more.
SECTION 7—PARTS INFORMATION This section contains information that may assist you in cross referencing Apparatus Codes, Comcodes and Price Element Codes (PECs). The first table is grouped by descriptive Price Element Codes (PEC). The second table is arranged by component codes (COMCODE).
PEC DESCRIPTION APPARATUS CODE COMCODE 62502 GS Trunk CP ZTN76 103965232 62503 LS Trunk CP ZTN77 103965240 62504 TR Line CP ZTN78 103965257 62505 ATL Line CP ZTN79 103965265 62506 Asynchronous Data Unit D181521 includes 105105506 Part of: 62506 62506 D8W-87 Cord (14 ft) Z3A5 ATL ADU 103786802 103975349 62507 Digital Tape Unit TS-555A 404079436 62508 System Admin Terminal (SAT) TI-703 404079428 62509 Direct Extension Selector Console 23A1-003 e/w 103969424 Part of: 6250
PEC DESCRIPTION APPARATUS CODE 62513 Part of: 62513 62513 62513 MOH Interface D181575 includes COMCODE * KS23395 Interface 2012D Transformer 36A Voice Coupler 105143186 102600517 103558916 62514 Part of: 62514 62514 10B ETU 62515 Peripherals Interface for Remote Access Emergency Trans Unit (2) B25A Cables DE D8W-87 Cord (7 ft) Part of: 62515 62515 62515 62515 62515 62515 62515 62515 62515 62515 103984118 100017334 103786786 248B Adapter 355AF Adapter 248B Adapter 400B2 Adapter D6AP-87 Cord D
PEC DESCRIPTION APPARATUS CODE COMCODE 63118† Aux Trunk CP TN763 103557161 63119† Pooled Modem CP TN758 103557112 63123† Tone Detector CP TN748 103976163 63130† Data Line CP TN726 103556791 1020-S90 ACCESS Software * 105341218 1020-S91 CAM Software * 105341382 1203-020 AA Software * 105339584 2169-001 Tip Ring ADU Z3A1 103963963 2169-004 Tip Ring ADU Z3A4 103964185 21691 Part of: 21691 21691 21691 ADU Aux Power 248B 400B D6AP-87 102802103 103848859 102937620 2301-S
PEC DESCRIPTION APPARATUS CODE COMCODE 2750-A24 Mod/RS232 Adapt, Male 355A 105012637 2750-A25 Mod/RS232 Adapt, Female 355AF 105012645 2750-T05 Voice/Data (Y) Adapter WP90851L1 405010620 2781-JDX System Wiring-Time and Materials * * 2782-JA1 (New) System Wiring Run, Firm Price * * 2782-JA2 (Reuse) System Wiring Run, Firm Price * * 2782-JC1 (New) System Wiring Run, Firm Price (Plenum Wiring) * * System Wiring-Based On a PCS Quote * * 2783-JDX 3100-1TD Basic TT Desk Tel 25
PEC DESCRIPTION APPARATUS CODE COMCODE 3141-BIS Part of: 3141-BIS 3141-BIS MET Set-BIS 2993C04 103942146 Transformer Kit of Parts 2012D 102600517 * 3143-12M 12-Button MET VT Z7203M01A-003 103963310 3160-111 (MAC30 Att) 5-Button MERLIN VT Z7302H01D-003 * 3161-172 (MAC30 Att) 10-Button MERLIN VT Z7303H01D-003 * 3161-161 MERLIN HFAI VT Z7309H01B-003 103982005 3162-412 34-Button MERLIN VT Z7305H01D-003 * 3162-417 (MAC30 Att) 34-But Dlx MERLIN VT Z7305H02D-003 * 3162-BIS MERLI
PEC DESCRIPTION 8310-001 AC Power Surge Suppressor TII Model 428 APPARATUS CODE COMCODE 402988950 Miscellaneous No PEC Fanning Strip 50A 105196604 No PEC Block, Connector 110 Female 103756334 No PEC Block, Connector 157B Female 403613003 No PEC Cable Conn (15’ DE) A25D 100963990 No PEC Block, Connector 103A 103104220 No PEC Block, Connector 104A 103116943 No PEC Panel (Part of SIP) 617A 103982658 No PEC ll0 to Mod Adpter 858A 405177791 No PEC Mod to Mod Adpter Z210A1
Parts Listed by COMCODE Throughout the following table, “part of” is abbreviated as “P/O.
COMCODE PEC DESCRIPTION APPARATUS CODE 103557062 63116† DID Trunk CP TN753 103557112 63119† Pooled Modem CP TN758 103557161 63118† Aux Trunk CP TN763 103558916 P/O 62513 MOH Interface 36A Voice Coupler 103756334 No PEC Block, Connector 110 Female 103786786 P/O 62515 P/O 62514 2725-07G Peripherals Interface 10B ETU D8W-87 Cord (7 ft) 103786802 P/O 62509 Direct Extension Selector Console Asynchronous Data Unit D8W-87Cord (14 ft) PO 062506 D8W-87Cord (14 ft) 2725-075 103786828
COMCODE P E C DESCRIPTION APPARATUS CODE 103881421 2750-A17 MET Adapter Cord ZD8AJ 103942146 3141-BIS MET Set-BIS 2993C04 103942857 P/O 62510 MERLIN VT local power Z400F Adapter 103963310 3143-12M 12-Button MET VT Z7203M01A-003 103963963 2169-001 Tip Ring ADU Z3A1 103964185 2169-004 P/O 62515 Tip Ring ADU Peripherals Interface Z3A4 Z3A4 ADU 103965232 62502 GS Trunk CP ZTN76 103965240 62503 LS Trunk CP ZTN77 103965257 62504 TR Line CP ZTN78 103965265 62505 ATL Line CP
APPARATUS CODE COMCODE PEC DESCRIPTION 103981981 3162-DIS Z7305H04C-003 103982005 3161-161 MERLIN HFAI VT Z7309H01B-003 103982658 No PEC Panel (Part of SIP) 617A 103982740 P/O 6250-011 Memory CP ZTN81B 103984118 62514 10B ETU Emergency Trans Unit 104010061 31710 Acoustic Coupler 349A Adapter 104152558 P/O 62515 Peripherals Interface 400B2 Adapter 104154430 2724-38X P/O 62515 Mod (ADU) X-Over Cord Peripherals Interface D8AM-87 D8AM-87Cord 104174750 31761 Power Panel 346A
COMCODE PEC DESCRIPTION APPARATUS 105335657 62519 RlV2 Upgrade Kit D181782 105339584 1203-020 AA Software * 105341218 1020-S90 ACCESS Software * 105341382 1020-S91 CAM Software * 105355374 62520 STARLAN/ATL Interface D181807 402988950 8310-001 AC Power Surge Suppressor * 403242639 P/O 62509 KS22911 L1 Power P/O 62512 P/O 62520 Direct Extension Selector Console MERLIN VT local power Paging/Dictation STARLAN/ATL Interface 403613003 No PEC Block, Connector 157B Female 40383
COMCODE PEC DESCRIPTION APPARATUS CODE KS-23475,L1 405462904 P/O 62520 STARLAN/ATL Interface Adapter 527840003 2610-001 AT&T STARLAN NETWORK Network Extension Unit (NEU) 527840102 2614-100 AT&T STARLAN NETWORK Network Access Unit (NAU) 845412956 No PEC CPU/MEM Interconnect Cable * 845416379 P/O 6250-011 P/O 6250-012 P/O 62501 Fan (2) WP90677L1 845416635 P/O 6250-011 P/O 6250-012 P/O 62501 Address Plug 845875155 P/O 6250-011 P/O 6250-012 SLAC Grap. Layer (2) * Not Available.
SECTION 8—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. Manuals not specified for Release 1 Version 2 (R1V2) cover both R1V1 and R1V2. Basic Manuals Administration Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Administration Manual for R1V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Software Advanced Administration Software Package Communications Access Manager Software Package ● AT&T STARLAN NETW0RK ACCESS Software Package ● ● Descriptions of Basic Manuals Administration Manual Provides the information necessary to initialize a system and to perform on-going system administration. Explains the operation of the System Administration Terminal, the Digital Tape Unit, and the commands that allow the System Administrator to make changes and additions.
Planning Manual The document is a presale workbook used by the Account Team and customer to define a set of orderable equipment that will meet the customer’s specific requirements. This workbook, when completed, can be used in conjunction with the Quick-Quote Price Estimator or the DOSS Configurator to obtain a price estimate or formal quote or to place an order. Reference Manual This document is the principal technical reference of the system.
SECTION 9—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.
Attendant Console ● Direct Trunk or Switched Loop Attendant Console: An electronic call-handling 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.
Bus, Time Division Multiplex See Time Division Multiplex Bus. CCS (Hundred Call Seconds) A traffic-measuring unit that expresses the load of one or more traffic-handling devices. A device used for 1 hour without interruption generates 36 CCS which equals 1 erlang (see Erlang). Call Appearance, Attendant Console Two buttons, labeled System Access, used to originate, receive, and hold calls. Each button has two associated LEDs to show the status of the call appearance.
Console See Attendant Console. Coverage Call A call that is redirected from the called party’s personal dial code to an alternate answering position when certain criteria are met. Coverage Path The order in which calls are redirected to alternate answering positions. Coverage Point The attendant positions (as a group), Direct Group Call (DGC) group, Coverage Answer Group, or a voice terminal extension designated as an alternate answering position in a coverage path.
Data Module A data interface device (i.e., Asynchronous Data Unit) providing a standard interface between customer provided data equipment and a data port on the switch. Data Terminal Equipment (DTE) DTE refers to a specific RS-232C connector termination designed to connect directly to a DCE type connection. Typically associated with video display terminals, printers, and computers which either originate or terminate a data transmission path.
Facility (physical) A transmission channel to another switching system; to a Central Office for example. By application, examples are: ● CO Trunks ● FX Trunks ● WATS ● OCC Trunks ● Tie Trunks Trunks By technical type these include loop start, ground start, DID, automatic ringdown, etc. These facilities may be accessed by their facility access codes (FACs). Feature A specifically defined function or service provided by the system.
Home Numbering Plan Area Code (HNPA) The local area code. The area code does not have to be dialed to call numbers within the local geographical area. 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.
Modem Pooling Provides shared-use conversion resources that eliminate the need for a dedicated modem when an analog data end point accesses, or is accessed by, an analog line or trunk. Multifeature Single-Line Voice Terminal A terminal served by one tip and ring voice circuit and having additional buttons for activating features. Multilane Voice Terminal A terminal equipped with several call appearance buttons for the same extension number.
Parameter Any set of physical properties whose values determine the characteristics or behavior of something Peripheral Equipment System Administration Terminal (SAT), SMDR Output device such as a SMDR Printer or a Call Accounting System, Digital Tape Unit (DTU). Personal Dial Code Each system user is assigned a PDC and is allowed to “ login” the PDC at any voice terminal in the system (optional feature) as they move about the premises. The PDC may be a 1-, 2-, 3-, or 4-digit number.
Protocol A set of conventions or rules governing the format and timing of message exchanges to control data movement and correction of errors. 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, or to an idle trunk.
Software A set of computer programs that accomplish one or more tasks. Split A condition whereby a caller is temporarily separated from a connection with the attendant. This split condition automatically occurs when the attendant, active on a call, presses the Start button. Status LED (lamp) A green LED or lamp that shows the status of a call appearance or a feature button by the state of the lamp (lighted, flashing, fluttering, broken flutter, or dark).
Tie Trunk A telecommunications channel that directly connects two private switching systems. Time Division Multiplex Bus A special bus that is time shared by preallocating short time slots to each transmitter on a regular basis. In a PBX, all port circuits are connected to the time division multiplex bus permitting any port to send a signal to any other port. Tone Ringer A device with a speaker, used in electronic voice terminals to alert the user.
Write Operation The processor putting information onto a storage medium such as magnetic tape. 800 Service A service that allows incoming calls from a certain area or areas to an assigned number for a flat-rate charge based on usage.
INDEX Auxiliary Equipment (Contd.
Error Log, 2-235 EX RS-232 Driver, 2-100 Exclusion, 2-134 Expert Mode (V2), 2-135 Extended Stations, 2-138 Extending, Attendant Call, 2-8 External Alerts, 2-139 Connections, (Contd.
Pooled Facility (Contd.) - Direct Access, 2-187 Pooled Modem (TN758), 3-43 Pooling, Modem, 2-164 Port Circuits, 3-10 Specifications, 5-l0 Position Busy, Attendant, 2-37 Power Failure Transfer (PFT), 2-189 Preference, Prime Line, 2-155 Ringing Line, 2-155 Preindication, Data Call, 2-247 Preselection, 2-156 Prime Line Preference, 2-155 Program, 2-194 Programmable Feature Buttons, 2-18 Line (Contd.
Speaker, 2-206 Speakerphone Adjunct, 2-207 Speed Dialing, 2-212 Splitting One-Way Automatic, Attendant, 2-47 STARLAN INTERFACE (ZTN84), 3-37 Circuit Pack, 2-216 STARLAN NETWORK Access (V2), 2-215 Administrable Parameters, 2-221 Station Features, 2-4 Hunting, 2-222 Interconnect Panel (SIP), 4-48 Message Detail Recording (SMDR), 2-62 Station-To-Station Message Waiting, 2-163, 2-224 Stations, Extended, 2-138 Off-Premises, 2-175 Out-of-Building, 2-176 Switch, Digital, 1-1 Switched Loop Attendant Console, 2-17 O
