AT&T 555-025-101 Issue 4 April 1990 AT&T DEFINITY ® Communications System and System 75 and System 85 DS1/DMI/ISDN-PRI Reference
NOTICE While reasonable efforts were made to ensure that the information in this document was complete and accurate at the time of printing, AT&T can assume no responsibility for any errors. Changes or corrections to the information contained in this document may be incorporated into future issues.
CONTENTS ABOUT THIS DOCUMENT xix PURPOSE xix INTENDED AUDIENCES xx PREREQUISITE SKILLS AND KNOWLEDGE xx HOW THIS DOCUMENT IS ORGANIZED xx HOW TO USE THIS DOCUMENT xxii TRADEMARKS AND SERVICE MARKS xxii RELATED SOURCES xxii HOW TO MAKE COMMENTS ABOUT THIS DOCUMENT 1.
iv CONTENTS DS1/DMI PRIVATE-NETWORK CONNECTIONS 2-3 Generic 1, Generic 2, System 75, or System 85 to Another System 2-3 Host Computer to Another System 2-3 IBM ® IDNX Multiplexer to Another System 2-4 Other Vendor Digital Switch to Another System 2-4 Analog Switch to Another System 2-5 OPS to Another System Via a D4-Channel Bank 2-5 DS1/DMI PUBLIC-NETWORK CONNECTIONS 2-6 4ESS to Another System (Special-Access Connection) 2-6 5ESS to Another System 2-7 DACS to Another System 2-8 Analo
CONTENTS v System 85 Traditional Modules 3-9 Generic 1 and Generic 2 Universal Modules 3-9 4. THE DIGITAL LOSS PLAN LOSS-PLAN IMPLEMENTATION AND PROVISIONING 4-1 4-2 Generic 2 4-2 Generic 1 4-3 PORT-TO-PORT LOSS VALUES 4-4 DS1/DMI/ISDN-PRI PORT LOSSES 4-6 TERMINATING A DS1 AT A CHANNEL BANK 4-6 Tie Trunk Ports 4-6 CO DID Trunk Ports 4-6 OPS Ports 4-7 5.
vi CONTENTS Line+Trunk Mode DS1/DMI-BOS (ANN35 or TN767 with TN555) 5-30 DMI-MOS (ANN35 or TN767 with TN755) 5-30 USE OF GENERIC 1 AS A SYSTEM CLOCK REFERENCE 5-30 Trunk-Mode ISDN-PRI (TN767) 5-30 Trunk-Mode Interface (ISDN-PRI + Robbed Bit) (TN767) 5-30 Line-Only Mode DS1/DMI-BOS (TN767) 5-31 Trunk-Mode DS1/DMI-MOS (TN767) 5-31 6.
CONTENTS vii Procedure 010 Word 4: Line Side (B-Channel) BC and ISDN Routing Options 7-22 Procedure 100 Word 1: Trunk Group Type, Signaling, and Dial Access (ID) Code 7-23 Procedure 100 Word 2: Trunk Group Data Translations 7-26 Procedure 100 Word 3: ISDN Trunk Group Signaling Options 7-27 Procedure 101 Word 1: ISDN Trunk Group, SMDR, Digital Loss Plan, and AVD Assignments 7-30 Procedure 103 Word 1: Trunk Group Digit Collection and Trunk-Side BC 7-33 Procedure 116 Word 1: DS1/DMI/ISDN-PRI Trun
viii CONTENTS Procedure 101 Word 1: ISDN Trunk Group, CDR, and Digital Loss Plan 7-88 Procedure 103 Word 1: Network Trunk Group Translations 7-90 Procedure 116 Word 1: DS1/DMI/ISDN-PRI Trunk Assignments 7-92 Procedure 012 Word 1: Name Database 7-94 Procedure 012 Word 2: Name Database 7-95 Procedure 012 Word 3: Name Database 7-96 Procedure 279 Word 1: Network Facilities Coding 7-97 Procedure 309 Word 1: ARS Route Tables 7-100 Procedure 309 Word 5: ARS–ISDN BCCOS 7-101 Procedure 321 Word 1
CONTENTS 8. MAINTENANCE AND ALARMS ix 8-1 GENERIC 1 AND GENERIC 2 ISDN-PRI MAINTENANCE PHILOSOPHY 8-1 GENERIC 2 MAINTENANCE CAPABILITIES AND CONCERNS 8-1 Generic 2 Maintenance Procedures 8-2 Summary of Generic 2 Maintenance Capabilities 8-5 GENERIC 1 MAINTENANCE CAPABILITIES AND CONCERNS 8-6 Generic 1 Maintenance Procedures 8-6 Summary of Generic 1 Maintenance Capabilities 8-7 8-7 ALARMS Circuit Pack Alarms 8-7 Facility Alarms 8-8 A. ADMINISTRATION REQUIREMENTS A-1 B.
x CONTENTS System 85 DS1/DMI-BOS to a CEM or CDM C.
CONTENTS D.
xii CONTENTS LIST OF FIGURES Figure 1-1. System 85 R2V4 ISDN Configuration 1-5 Figure 1-2. Generic 2 ISDN Network Configuration 1-6 Figure 1-3. Generic 1 ISDN Network Configuration 1-7 Figure 1-4. D4 Framing 1-11 Figure 1-5. DS1 Extended Superframe Format 1-12 Figure 1-6. DS1 Signal, Framing Format, and ESF Superframe (24 Frames) 1-13 Figure 1-7. Alternate Mark Inversion 1-17 Figure 1-8. Example of B8ZS Line Coding 1-19 Figure 1-9. ISDN Message Signaling Format 1-26 Figure 3-1.
CONTENTS xiii Figure 5-17. Excessive Cascading 5-25 Figure 5-18. Minimized Cascading 5-25 Figure 5-19. Excessive Synchronization from One Node 5-26 Figure 5-20. Minimized Synchronization from One Node 5-27 Figure 6-1. Physical and Virtual Carrier Slot Relationships, Line-Only Mode 6-8 Figure 6-2. Physical and Virtual Carrier Slot Relationships, Line+Trunk Mode 6-9 Figure 7-1. Procedure 275 Word 4: System COS and Miscellaneous Service Assignments (System 85 R2V4) 7-3 Figure 7-2.
xiv CONTENTS Figure 7-20. Procedure 309 Word 5: ARS and Transit Network Identifiers (System 85 R2V4) 7-44 Figure 7-21. Procedure 321 Word 1: AAR (System 85 R2V4) 7-46 Figure 7-22. Procedure 321 Word 5: AAR and Transit Network Identifiers (System 85 R2V4) 7-47 Figure 7-23. Procedure 107 Word 1: ATMS Terminating Test Line Assignment (System 85 R2V4) 7-49 Figure 7-24. Procedure 108 Word 1: ISDN Terminating Test Line Assignments (System 85 R2V4) 7-50 Figure 7-25.
CONTENTS xv Figure 7-44. Procedure 116 Word 1: DS1/DMI/ISDN-PRI Trunk Assignments (Generic 2) 7-92 Figure 7-45. Procedure 012 Word 1: Name Database (Generic 2) 7-94 Figure 7-46. Procedure 012 Word 2: Name Database (Generic 2) 7-96 Figure 7-47. Procedure 012 Word 3: Name Database (Generic 2) 7-97 Figure 7-48. Procedure 279 Word 1: Network Facilities Coding (Generic 2) 7-98 Figure 7-49. Procedure 309 Word 1: ARS Route Tables (Generic 2) 7-100 Figure 7-50.
xvi CONTENTS Figure 7-76. SID Prefix Table Screen 7-144 Figure 7-77. SID Prefix Table Screen, Sample Application 7-146 Figure 7-78. Routing Patterns Screen 7-147 Figure 7-79. Hunt Group Screen 7-150 Figure 7-80. Terminating Extension Group Screen 7-151 Figure 8-1. Facilities Generating the RFA 8-9 Figure A-1. DS1 Circuit Pack Screen A-1 Figure A-2. Trunk Group Screen, Page 1 (MEGACOM) A-2 Figure A-3. Trunk Group Screen, Page 1 (MEGACOM 800) A-3 Figure A-4.
CONTENTS xvii LIST OF TABLES TABLE 1-1. 24th-Channel Signaling Arrangement 1-15 TABLE 1-2. Data-Module Capabilities 1-21 TABLE 1-3. BCCOS 1-25 TABLE 3-1. System 85 Traditional Module Equalizer Settings (Metallic Cable) 3-9 TABLE 4-1. Digital Loss Plan Encodes 4-3 TABLE 4-2. Digital Loss Plan (Port-to-Port Losses) 4-5 TABLE 5-1. SCS References Switches TABLE 6-1. Supported Digital Facilities 5-10 6-2 TABLE 7-1. DS1 Administration — Channel Versus Line Assignments 7-14 TABLE 7-2.
xviii CONTENTS TABLE C-3. User-to-User IE Opcodes C-12 TABLE C-4. Codeset Map Number to Incoming and Outgoing Translations C-12 TABLE D-1. Trunk/Signaling Cross References D-2 TABLE D-2. R2V4 Alternate Signaling Type Translations D-6 TABLE D-3. Signaling Type Compatibility D-7 TABLE D-4.
ABOUT THIS DOCUMENT PURPOSE Over the past several years, basic digital signal level 1 (DS1) service has evolved to include new capabilities and thereby support more sophisticated applications. The three prime applications are: 1 . Digital multiplexed interface with bit-oriented signaling (DMI-BOS) 2 . Digital multiplexed interface with message-oriented signaling (DMI-MOS) 3 .
xx ABOUT THIS DOCUMENT INTENDED AUDIENCES Since this document contains information ranging from the brief tutorial to the detailed requirements, it should prove useful to several groups of readers, including: ● Marketing personnel ● Technical consultants ● Network engineers ● Installation personnel ● System administrators ● Account teams ● Customers PREREQUISITE SKILLS AND KNOWLEDGE While there are no prerequisite skills assumed in this document, a basic understanding of telephony and networ
ABOUT THIS DOCUMENT 6. xxi PORT TYPES/INSTALLATION COMPATIBILITIES — Describes the DS1/DMI circuit pack operating modes, slot restrictions, and administration considerations and restrictions. This section also includes a table that lists the available port types and shows their compatibility on a system, release, version, and circuit-pack suffix basis. 7.
xxii ABOUT THIS DOCUMENT HOW TO USE THIS DOCUMENT How you will use this document will depend on several factors such as the amount of training you have received or your personal preferences for working with something new. You may want to read this document from cover to cover, use it merely as a reference when questions arise, or find that something in between these two extremes will best suit your needs.
ABOUT THIS DOCUMENT xxiii Channel Division Multiplexer Installation and Maintenance Manual 365-165-101IS Channel Expansion Multiplexer Installation and Maintenance Manual 365-160-101IS D4-Channel Bank Channel Units — Application Engineering 855-351-105 DEFINITY Communications System Generic 1.
xxiv ABOUT THIS DOCUMENT
1. INTRODUCTION Digital signal level 1 (DS1) trunks (trunks that carry 24 multiplexed channels on a single 1.544M-bps stream and use a bit-oriented signaling (BOS) interface) were introduced in 1962 to replace older analog transmission equipment used between toll offices. At the same time, D-type channel banks (channel banks that convert analog data to digital data or vice versa) were also introduced. One D-type channel bank (D4) is used at both the send and receive ends of a DS1 facility.
1-2 INTRODUCTION The bit stream of the DS1 protocol (1s and 0s) is transported over a DS1 line in a special way. The 1s are represented as alternating positive and negative pulses (called an alternate mark inversion (AMI) or bipolar signal); the 0s are represented as the absence of pulses. Two formats known as a DS1 line-coding formats can be used for encoding 1s into the bipolar bit stream. The DS1 channels, signaling, framing, and line-coding formats are all described in this section.
INTRODUCTION 1-3 The term ISDN refers to the collection of international recommendations that are evolving toward adoption as a CCITT telecommunications standard. These recommendations are based on the following objectives: 1. To provide the user with end-to-end digital connectivity (which in theory will be independent of the network provider) 2.
1-4 INTRODUCTION The BRI terminates at a subscriber’s residence or office. There, it connects either to an ISDN compatible terminal or to a conventional terminal via a terminal adapter. The BRI channel structure consists of a 2B + 1D format. Each B or bearer channel provides a 64K-bps information channel. Each D-channel provides a 16K-bps signaling channel. NOTE: Specific descriptions for BRI layers 1, 2, and 3 are not included here.
INTRODUCTION 1-5 Figure 1-1. System 85 R2V4 ISDN Configuration Generic 2 provides a signaling method called nonfacility-associated signaling (NFAS). NFAS allows a D-channel on one PRI facility (sometimes called a PRI pipe) to provide signaling for B-channels on another PRI pipe. With NFAS, if two or more PRI pipes are present, an optional D-channel backup feature is available. One D-channel is administered as the primary D-channel on one DS1 and the secondary D-channel on another DS1.
1-6 INTRODUCTION Figure 1-2. Generic 2 ISDN Network Configuration Generic 1 and Generic 2 provide ISDN-PRI but do not support wideband channels. Additionally, ISDN-BRI is not currently supported in Generic 1. However, end-to-end digital connections are permitted via line-side DCP-interface voice terminals and DCP-interface data modules. Figure 1-3, Generic 1 ISDN Network Configuration, shows a Generic 1 in a sample network.
INTRODUCTION 1-7 Figure 1-3. Generic 1 ISDN Network Configuration Channels Each channel transports 8-bit words (signal samples). Signal samples repeat at an 8K-Hz rate yielding a 64K-bps signal. The channels may be used to transmit any of four different types of signals.
1-8 INTRODUCTION Voice Analog voice date is encoded into 64K-bps pulse-code modulation (PCM) samples using an encoding technique known as the Mu-255 law. Details of this encoding technique are not given here. The important point is that each DS1 channel can transport PCM-encoded 64K-bps voice signals. Voice-grade data Voice grade data is also called PCM Data and voiceband analog data. Modems receive digital data, convert the data to an analog voiceband signal, and transmit it over analog phone lines.
INTRODUCTION 1-9 To properly transmit digital data, the following conditions must be met: ● The data communications protocol must meet the 1s-density requirement (see Line-Coding Formats later in this chapter). ● 24th-channel signaling must be administered (except for mode 1 data which can use robbed-bit facilities). (See 24th-Channel Signaling later in this chapter.) ● The transmission link must consist of an end-to-end digital facility.
1-10 INTRODUCTION Circuit-Switched Versus Packet-Switched Channels A circuit-switched channel provides the full bandwidth of a channel to the single terminating application on an end-to-end basis. For example, the full 64K-bps B-channel bandwidth is continuously available for both calling and called users. As a contrast, a single packet-switched channel divides the bandwidth of a channel into multiple logical channels. The logical channels use a channel's bandwidth on an as-required and multiplexed basis.
INTRODUCTION 1-11 Figure 1-4. D4 Framing The D4 framing is the format compatible with D4-channel banks. The D4 framing is the only framing format supported by all equipment used with System 75 and System 85 DS1 (such as CEMs and CDMs). The DS1, while providing an error-detection capability, monitors the receive sequence of framing bits to detect transmission errors. If a transmission error (such as a noise hit) causes a bit in the framing pattern to be in error, a misframe is said to have occurred.
1-12 INTRODUCTION ESF Framing Initially, this format was called Fe , pronounced “F sub e,” for framing extended. It is now called extended superframe (ESF). The ESF framing format was developed after the D4 format. Not all equipment used with a DS1/DMI-BOS interface supports ESF. Specifically, most D4-channel banks (unless they are configured as LIU-3ESF or equivalent) and CDMs do not currently support ESF framing. (See figure 1-5, DS1 Extended Superframe Format.
INTRODUCTION 1-13 end, one framing bit is inserted in each succeeding 193rd bit-position of the DS1 signal. The receive end uses the framing pattern to synchronize the end of one 24-channel block and the beginning of the next, to identify the channels that contain embedded signaling information, and to detect errors. NOTE: This 4K-bps facility data link is designed to maintain and supervise a DS1 facility. However, this link is used by a System 75 and System 85 DS1s only for transmitting yellow alarms.
1-14 INTRODUCTION The CRC is used at the receive end to detect transmission errors. The CRC is calculated at the transmit end and multiplexed into the DS1 signal. At the receive end, the CRC is recalculated using the data in the received ESF superframe and then compared with the received CRC. If a transmission error (such as one caused by a noise hit) results in the CRC being in error, a misframe occurs.
INTRODUCTION 1-15 For AT&T proprietary signaling, a complete set of signaling information is sent every 24 frames. This 24-frame period is not synchronized to the 12-frame superframe format of D4 framing or to the 24-frame superframe format of ESF framing. Each signaling word contains the equivalent of a channel identification number and the signaling state for that channel.
1-16 INTRODUCTION For System 75, the TN722 provides only AT&T proprietary signaling. However, the TN722B can be administered to provide either AT&T proprietary signaling or DMI-BOS. The CCITT Q.921 ISDN-PRI recommendations require that MOS-type signaling be used. In DMIMOS, signaling is done with messages that consist of a series of information elements (IEs). The type of IEs used for a particular signaling message are generally determined by the conditions.
1-17 INTRODUCTION v(t) +3 t -3 0 1 0 1 1 0 1 1 1 Figure 1-7. Alternate Mark Inversion 1s-Density Requirement On the receive side, a DS1 uses the received bipolar pulses of the DS1 signal to recover the 1.544Mbps clock signal that transmitted the bit stream. To do this, the bipolar signal must contain enough pulses (1s) to allow the clock recover circuit to remain synchronized with the bipolar signal. This is known as the 1s-density requirement.
1-18 INTRODUCTION Restricted Channel A restricted channel is a digital transmission facility restricted to transmissions in which an all-0s octet (eight 0s in a single time slot) is never transmitted. In restricted channels, the line equipment’s transmitters use ZCS line coding. This format monitors the 24 DS0 channels and prevents eight consecutive 0s (the all-0s octet) from being transmitted.
1-19 INTRODUCTION UNCODED BIT STREAM PULSE STREAM 010011 00000000 111 0+00-+ 000+0-+ -+- 00000000 000-+0+- 00000000 01 000-+0+- 0+ VIOLATIONS BASED ON POLARITY OF LAST 1 TRANSMITTED Figure 1-8. Example of B8ZS Line Coding Applications requiring B8ZS line coding are currently in the minority, but it is expected that in the long term they will be in the majority. The B8ZS provides no substantial advantages for voice and voice-grade data signals over ZCS.
1-20 INTRODUCTION Bipolar Violations As noted earlier, the DS1 bit stream is transmitted as a series of pulses. Successive pulses, regardless of the number of intervening spaces (0s), are of opposite polarity. A bipolar violation is the occurrence of two consecutive identical pulses, that is, when two positive or two negative pulses are received in a row, regardless of the number of intervening 0s. Usually, bipolar violations are caused by noise hits on the DS1 bit stream.
1-21 INTRODUCTION TABLE 1-2. Data-Module Capabilities Data Module DTDM MPDM MPDM/M1* 3270 A 3270 T PC/PBX w/ASCII Term Emul PC/PBX w/3270 Emulation 7500 UDM-T Notes User Data Rate Sync/ Async Bit Invert Protocol Packaging Handshake 2 0 1 2 300 - 19.2K 64K 56K to 19.2K both sync sync both yes yes no yes HDLC no DDS HDLC mode 2 mode 2 mode 2 yes 1 2 2 3 3 2 3 56K to 19.2K to 19.2K 64K 64K to 19.
1-22 INTRODUCTION The method used to provide ACCUNET ® switched digital service (used by D4-channel banks) also maintains the 1s-density requirement. This method uses only seven of the eight bits for each DS0 channel's 8-bit word to carry user data. The remaining bit (8) is “wired” to a 1. (MPDM/M1* is compatible with ACCUNET switched digital service).
INTRODUCTION 1-23 Bearer Capability (BC) System 85 R2V4 introduced the administration attribute known as bearer capability (BC). The primary function of BC is to specify the transport mode and the channel requirements (clear/restricted) needed for completing a data call. BC is used for determining compatibility when non-ISDN facilities are connected to ISDN facilities, including originated calls, terminated calls, and tandem connections.
1-24 INTRODUCTION Generic 1 For information about how BC is done for Generic 1, refer to the AT&T DEFINITY 75/85 Communications System Generic 1 and System 75 and System 75 XE Feature Description (555-200201). Generic 2 Generic 2 continues the bearer capability concept with bearer capability class of service, (BCCOS). With BCCOS, switch administration software provides a range of codes from 0 through 255.
INTRODUCTION 1-25 TABLE 1-3. BCCOS Switch Parameter Default Value Analog Lines All trunks except Host Access AAR/ARS Preferences Host Access trunks DCP data modules (both lines and trunks) BRI extensions 0 0 0 1 1 0 NOTE: Extensions with multiple appearances must have the same BC administered for each appearance. ISDN Call Processing ISDN-PRI is a trunk signaling type. ISDN trunk signaling is applied on a per-trunk-group basis and is compatible with most existing switch features.
1-26 INTRODUCTION Incoming Calls Incoming ISDN calls are generally processed similar to outgoing ISDN calls. Initially, the called switch receives a setup message over the D-channel and processes the contents of the setup message. The call states of the switch, how the particular trunk groups are administered, and decisions taken as a result of processing the setup message will determine exactly how the ISDN call is processed.
INTRODUCTION 1-27 Administration software also allows services to be dedicated to specific channels by assigning a channel to a particular trunk type. In this way, the switch always provides enough trunks for a particular type of service. Channels administered for specific services are not available for ISDNdynamic uses. With CBC Service Selection, calls requesting various types of services are routed, on a call-by-call basis, over the same ISDN channels.
1-28 INTRODUCTION CBC Service Selection CBC trunk groups eliminate the need for dedicating specific B-channels to a particular service. CBC Service Selection can dynamically select individual B-channels (from a group of B-channels) and allocate those B-channels to any of the subscribed services.
INTRODUCTION 1-29 one trunk type is needed, only one trunk group is available, and conventional routing digits are inadequate for the current application (for example, when using the same trunk group to provide DID, SDN, and DOD). A single trunk type, other than ISDN-dynamic, cannot provide all services since some calls use CO or tie trunk types. 4. Each AT&T ISDN-PRI nodal service (MEGACOM 800, SDN, ACCUNET switched digital service) may be provisioned to deliver from 0 to 7 digits.
1-30 5. INTRODUCTION Interworking between ISDN-PRI and DCS is a complex issue that is beyond the scope of this document. However, for a combined ISDN-PRI/DCS network, several new ISDN feature and service options are available.
INTRODUCTION 1-31 Full DCS feature transparency is provided between two or more Generic 2s interconnected with ISDN-PRI facilities. The supported voice terminal features include: ● Abbreviated dialing ● Alphanumeric display ● Automatic callback ● Call coverage ● Call forwarding — all calls ● Call waiting — terminating ● Call waiting — conference ● Priority calls ● Distinctive ringing ● Leave word — calling (no AP) ● Leave word — call transfer 9 .
1-32 INTRODUCTION
2. NETWORK CONNECTIONS AND CONFIGURATIONS This chapter provides a description of common connection arrangements with System 85 R2V4, DEFINITY ® Communications System Generic 1 and Generic 2. These connections include private network, public network, and those made through digital signal level 1 (DS1) auxiliary equipment. Also included is a description of the services provided by each connection, any option restrictions, and relevant synchronization issues.
2-2 NETWORK CONNECTIONS AND CONFIGURATIONS 5 . Counting the number of messages and comparing this to other trunks 6 . Determining whether a channel is hyperactive 7 . Maintenance busying out a virtual trunk group with hyperactive channels or returning cleared channels to normal service For more information about troubleshooting hyperactivity, refer to DEFINITY Communications System Generic 2 Maintenance Repair Strategies (555-104-118).
NETWORK CONNECTIONS AND CONFIGURATIONS 2-3 This means that in the exclusive case, the network’s call completes, and the user’s call must either wait or find another trunk. In the preferred case, the network’s call completes, and the user’s call is assigned to another trunk in this trunk group that is controlled by the same D-channel. DS1/DMI PRIVATE-NETWORK CONNECTIONS Private-network connections include DS1/DMI connections to other customer-premises switches, host computers, and off-premise stations.
2-4 NETWORK CONNECTIONS AND CONFIGURATIONS administrable but will not work for DMI-to-host-computer applications. Current versions of the AT&T 3B5 and 3B15 computers (DMI) provide E&M trunk signaling and only support the winkin/wink-out trunk type. Regarding synchronization, the computer must always derive its timing from the DMI signal received from the switch. The computer should never be used as a timing reference by the switch; this would cause each endpoint to get its timing from the other endpoint.
NETWORK CONNECTIONS AND CONFIGURATIONS 2-5 compatibility with other vendor products, operation is usually not guaranteed. The only exception to this rule is DMI host applications, where the certification process is assumed to have been executed with the specific computer vendor in question. The certification process also includes verifying that the vendor’s host DMI is premises distribution system (PDS) wiring compatible.
2-6 NETWORK CONNECTIONS AND CONFIGURATIONS DS1/DMI PUBLIC-NETWORK CONNECTIONS Public-network connections may include connections to COs, DACS frames, and toll offices. 4ESS to Another System (Special-Access Connection) Connections to a 4ESS switch are called special-access connections. The physical connection is made directly from customer premises to the 4ESS. Toll calls go directly from a System 75, System 85, Generic 1, or Generic 2 to the AT&T toll network.
NETWORK CONNECTIONS AND CONFIGURATIONS 2-7 Screening Intra-LATA Calls A 4ESS can be used to block within the local access and transport area (LATA). This is an inefficient use of the customer’s trunking arrangements, though. System 75, System 85, Generic 1, and Generic 2 special-access applications should use ARS to screen outgoing calls. By using the ARS feature, only inter-LATA calls are routed to a 4ESS.
2-8 NETWORK CONNECTIONS AND CONFIGURATIONS DACS to Another System The DACS may be thought of as an “electronic patch panel” for DS1/DMI-BOS. Cross-connections may be made at either the DS1 (1.544M-bps) level or the DS0 (64K-bps) level. A fully equipped DACS can terminate or cross connect 127 independent DS1/DMI-BOS facilities. The DACS supports both D4 and ESF framing, both ZCS and B8ZS line coding, and depending on the DACS software version, both RBS and DMI-BOS signaling.
NETWORK CONNECTIONS AND CONFIGURATIONS 2-9 Since the D4-channel bank is located at the CO end of a DS1/DMI facility, it is the responsibility of the CO to set the channel unit attenuators to the appropriate loss values. Chapter 4, The Digital Loss Plan, includes suggested loss ranges for setting these attenuators. For synchronization purposes, it should not be assumed that a D4-channel bank (residing in a CO) will obtain its timing from the AT&T reference frequency.
2-10 NETWORK CONNECTIONS AND CONFIGURATIONS When CDMs are used to provide the drop and insert function, they are typically located near where a DS1/DMI-BOS facility leaves the switch and are placed in series with the DS1/DMI signal. The CDMs allow one or more channels to be inserted into a DS1/DMI facility at the transmit end and to be correspondingly dropped from the facility at the receive end. The remaining DS1/DMI channels are passed through the CDMs and to a System 75 or System 85 switch unchanged.
NETWORK CONNECTIONS AND CONFIGURATIONS 2-11 The assignment of CEM channels must be coordinated with the DS1/DMI-BOS channel assignments on the switch. This is necessary so that only voice and voice-grade data channels are compressed and so that digital data or 24th-signaling channels pass through uncompressed. The CEM does not place any restriction on a DS1/DMI-BOS between the switch and the CEM.
2-12 NETWORK CONNECTIONS AND CONFIGURATIONS The method for selecting the channels that are to be compressed and the channels that are to pass through uncompressed depends on the type of signaling used. Both methods are described as follows. If VBR signaling is used, the assignment of compressed and uncompressed channels on one of the two input DS1/DMI-BOS facilities is done using 12 front-panel switches. The assignment of the other input DS1/DMI-BOS facility is done by default by the CEM.
NETWORK CONNECTIONS AND CONFIGURATIONS 2-13 System 85 or Generic 2 ISDN-PRI to Another Vendor’s Digital Switch When a System 85 or Generic 2 ISDN-PRI connects to another vendor’s customer-premises switch (another vendor’s ISDN-PRI or equivalent), several items should be verified to ensure compatibility. These include the interface electrical characteristics, options, and synchronization capabilities.
2-14 NETWORK CONNECTIONS AND CONFIGURATIONS Dial Tone Second dial tone may be provided by a 4ESS. However, it is recommended that the customerpremises switch provide a second dial tone. With this arrangement, the second dial tone can be provided through use of the ARS feature on all ISDN-PRI trunks that terminate on a 4ESS.
NETWORK CONNECTIONS AND CONFIGURATIONS 2-15 Network Specific Facility For outgoing calls from the customer-premises side, the 4E11 and 4E12 will accept a network specific facility (NSF) but do not require that one be present. For call-by-call trunk groups, the 4ESS will check for a NSF and will reject the call if one is not present. Synchronization A 4ESS is always synchronized to the AT&T reference frequency.
2-16 NETWORK CONNECTIONS AND CONFIGURATIONS
3. DS1 TRANSMISSION AND CABLING Digital signal level 1 (DS1) is the specification for a particular digital signal format. DS1 interfaces should not be confused with T1 digital carriers. T1 is a specific transmission system. T1s are used to transmit digital signals of the DS1/DMI/ISDN-PRI format. This chapter describes the different methods of transmitting DS1 from one point to another.
3-2 DS1 TRANSMISSION AND CABLING Digital transmission facilities are used to transmit digital signals from one location to another. Many different digital transmission systems exist of which T1 is one. The type of facility used depends primarily on the distance between the endpoints, but other requirements may also affect facility selection. For example, an application may require nonmetallic facilities as opposed to metallic ones for reasons specific to that application.
DS1 TRANSMISSION AND CABLING ● 3-3 Monitoring of the input DS1 or, when necessary, adding pulses (1s) to ensure that the onesdensity requirements are met ● Removing bipolar violations (which implies incompatibility with B8ZS line coding) ● Termination of a DS1 or regeneration of received data using an office repeater ● Provisions for supplying DC power to a DS1 to power line repeaters ● A fault-locating jack to aid in testing repeaters on the DS1 ● Jacks for manually looping the NCTE and aiding
3-4 DS1 TRANSMISSION AND CABLING Because ANN11Ds, ANN11Es, TN722Bs, and TN767s contain components that suppress unwanted emissions from a DS1, standard premises distribution system (PDS) cables may be used to interconnect these interfaces. The PDS wiring may only be used when connecting directly between System 75 and System 85 DS1s. Other equipment is not guaranteed to meet FCC emission requirements when used with unshielded cable.
DS1 TRANSMISSION AND CABLING 3-5 DS1 DS1 655 FT MAXIMUM 655 FT MAXIMUM DSX-1 PHANTOM POINT A. DIRECT DISTANCE OF 1310 FT OR LESS DS1 DSX-1 NCTE NCTE OFFICE REPEATER OFFICE REPEATER DSX-1 DS1 655 FT 655 FT MAXIMUM 3000 FT OR LESS MAXIMUM B. DISTANCE OF 1311 FT TO 4310 FT DSX-1 DS1 T1 LINE REPEATER NCTE 655 FT 3000 FT OR LESS MAXIMUM 6000 FT OR LESS DS1 DSX-1 NCTE 655 FT MAXIMUM T1 LINE REPEATER 3000 FT OR LESS C. DISTANCE OF 4311 OR MORE Figure 3-1.
3-6 DS1 TRANSMISSION AND CABLING The customer is responsibility for maintaining NCTEs. When purchasing service from the LEC, the customer must specify the DS1 framing and line-coding requirements. For off-premises cabling, it is also possible to use any of the connection methods described for “OnPremises Cabling” as long as appropriate lightning and powerline cross-protection is provided.
DS1 TRANSMISSION AND CABLING ● ● 3-7 The transmission system connects to a DS1 via a DSX-1 cross-connect The transmission system meets any special requirements for the application (for example, the transmission of bipolar violations if B8ZS line coding must be used) Figure 3-3, Nonmetallic Cabling Configurations, shows nonmetallic cabling transmission systems.
3-8 DS1 TRANSMISSION AND CABLING DS1/DMI OR D4 CHANNEL BANK DSX-1 DS1/DMI OR D4 CHANNEL BANK DSX-1 DS1/DMI OR D4 CHANNEL BANK DSX-1 CEM DSX-1 ANY DS1 TRANSMISSION MEDIA DSX-1 CEM DSX-1 DS1/DMI OR D4 CHANNEL BANK A. CEM ONLY DS1/DMI OR D4 CHANNEL BANK DSX-1 CDM CDM DSX-1 DEDCATED CHANNEL APPLICATIONS ANY DS1 TRANSMISSION MEDIA DSX-1 DSX-1 CHANNEL UNITS CHANNEL UNITS DS1/DMI OR D4 CHANNEL BANK DEDICATED CHANNEL APPLICATIONS B.
DS1 TRANSMISSION AND CABLING 3-9 LINE EQUALIZER AND COMPENSATION SETTINGS The Generic 1 and Generic 2 DS1 circuit packs generate a signal that is preequalized. Preequalized means that the bipolar signal is shaped so that when it reaches the cable end it conforms to the DSX1 power specification. System 85 Traditional Modules Traditional modules may be equipped with the ANN11_ and ANN35 circuit packs. Preequalization is provided by properly setting the three equalizer switches, on the circuit packs.
3-10 DS1 TRANSMISSION AND CABLING
4. THE DIGITAL LOSS PLAN Transmission loss is required so that talker echo is minimized. Furthermore, transmission loss must be kept low enough so that speech volume is perceived as adequately loud. Transmission loss is the total of all losses and gains from one end of a connection to the other. Distributed transmission losses as well as any connection loss inserted by the switch are included. Two different loss plans are available. They are known as: 1.
4-2 THE DIGITAL LOSS PLAN Some quantity of connection loss is desirable and deliberately engineered into most types of transmission links. The quantity of loss (magnitude and number of dBs) depends on the loss plan that is administered and the particular type of facility involved. Each particular set of port-to-port connection losses is known as a loss pad group. Connection loss serves to eliminate or significantly reduce talker echo on long-distance transmission links.
THE DIGITAL LOSS PLAN 4-3 TABLE 4-1.
4-4 THE DIGITAL LOSS PLAN Loss plan pbx-eia — for private-network-only applications that use analog tie trunks or digital tie trunks pbx-low — for use with combination tie trunks (private networks tandemed with public networks) toll — for use with connections to an analog toll office or digital toll office Digital conn loss normal — same as the EIA options used with Generic 2 low — same as the ISL options used with Generic 2; recommended for combination tie-trunk applications where low speech volume is
4-5 THE DIGITAL LOSS PLAN TABLE 4-2.
4 -6 THE DIGITAL LOSS PLAN switch will have value only after verification of this switch’s port-to-port loss specification. Conformance with ANSI standards greatly simplifies this process and reduces the likelihood of compatibility problems. ● ● The loss between switches is 0 dB over digital facilities, 1 dB for combination facilities, and VNL for analog facilities.
THE DIGITAL LOSS PLAN 4-7 OPS Ports Analog off-premises station (OPS) facility requirements specify a loss not to exceed 4 dB in each direction. To provide for transmission stability (eliminate singing and echo) with D4-channel units, at least 1 dB of loss in both directions is required from the 2-wire analog hybrid terminals. Foreign exchange subscriber end channel units (FXSs) provide losses adjustable from 1.0 through 1.8 dB.
4-8 THE DIGITAL LOSS PLAN
5. SYNCHRONIZATION OF DIGITAL FACILITIES The DS1 transmit and receive buffers (for Generic 1 and Generic 2) operate from a single external or internal clock. Each digital switch can accommodate multiple DS1 or T1 spans that link multiple switches. These may include both ISDN-PRI and DS1 links. Since each switch can transmit at a rate determined by its internal clock, information will be lost if the digital network is not synchronized to a single clock.
5-2 SYNCHRONIZATION OF DIGITAL FACILITIES Figure 5-1-A, Options for Synchronization, shows one possible connection between a pair of D4channel banks. Such a connection (using D4-channel banks) can typically be found with a pair of analog switching systems connected by T1-carrier facilities. For this arrangement, the transmitting portion of each channel bank independently determines the clock rates. The receiving portion of each channel bank derives its clock from the incoming digital bit stream.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-3 NOTE: The deletion or repetition of a single frame is termed a slip or a controlled slip. For an individual digital bit stream, slips are serious impairments since digital switching systems with improperly synchronized clocks will eventually suffer slips on every received digital bit stream.
5-4 SYNCHRONIZATION OF DIGITAL FACILITIES 3. Minimum costs 4. Ease of administration 5. Ease of maintenance For the hierarchical method, a node containing a very stable reference frequency is identified as the source or master reference. The master reference is transmitted to another node that is synchronized (slaved) to this master reference.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-5 MASTER REFERENCE FREQUENCY NOTE SLAVE NODES DIGITAL TRUNK PRIMARY REFERENCE NOTE: The dashed lines indicate which nodes supply reference frequencies and those facilities used to transmit the reference. Figure 5-2. Synchronization Hierarchy Switching nodes in digital networks are divided into synchronization layers called strata. There are four strata, 1 to 4, where stratum 1 has the highest accuracy and stratum 4 the lowest.
5-6 SYNCHRONIZATION OF DIGITAL FACILITIES The public digital network nodes and services that the AT&T private digital switches and digital terminal products can connect to are as follows: ● DDS ● Digital serving office (DSO), also called a digital toll office, such as a 4ESS ● Digital central office (DCO) such as a 5ESS ● Digital-access and cross-connect system (DACS) The AT&T private digital network nodes are the following: ● System 75 ● System 85 ● DEFINITY ® Communications System Generic 1
SYNCHRONIZATION OF DIGITAL FACILITIES 5-7 LEGEND DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY FREQUENCY REFERENCE NOTE: For System 85 and Generic 2, the SCS provides a stratum-4 type-II clock. However, a stratum-3 external clock may be used instead of the SCS. Figure 5-3. Stratum Levels for the Synchronization Hierarchy System 85 and Generic 2 Synchronization Architecture Both System 85 and Generic 2 can function as either a timing slave or timing master.
5-8 SYNCHRONIZATION OF DIGITAL FACILITIES TN463 CIRCUIT PACK STRATUM 4 HIGH ACCURACY CLOCK BACKPLANE CABLE TO PRIMARY DS1 INTERFACE (NOTE) BACKPLANE CABLE TO SECONDARY DS1 INTERFACE (NOTE) PRIMARY REFERENCE MAIN PHASE LOCKED LOOP MODULE CONTROL OR TMS CLOCK OSCILLATOR SECONDARY REFERENCE OPTIONAL CROSS-COUPLED CABLE FROM DUPLICATED SCS NOTE: These cables should not be installed if the switch is the master timing source for the network. Figure 5-4.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-9 a duplicated synchronization system, the same DS1 facility provides the primary and secondary reference for both duplicated halves. Figure 5-5, Duplicated Synchronization Architecture and Cross Coupling, shows a System 85 or Generic 2 with a duplicated architecture and cross-coupled cables.
5-10 SYNCHRONIZATION OF DIGITAL FACILITIES ● Loss of signal (LOS) at the (SCS) circuit for more than 200 ms. A switch is made to the highaccuracy clock (HAC) on the SCS by the SCS. A further analysis is then made to determine if the LOS is network related or switch related. A switch to a healthy reference is done if appropriate. ● Blue alarm means that the switch cannot be used as a reference.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-11 monitored to make sure that a switch is not attempted to an unhealthy SCS. If the SCS is not duplicated and the HAC is healthy, serious failures cause a switch to the HAC to ensure switch reliability. When the SCS can once more lock onto a DS1 reference, a switch to that reference is performed. Synchronization occurs at several priority levels; records are kept for perusal at the demand test level with procedure 625.
5-12 SYNCHRONIZATION OF DIGITAL FACILITIES TN768 or TN780 CIRCUIT PACK STRATUM 4 ACCURACY CLOCK EXTERNAL SYNC SOURCE PRIMARY REFERENCE EXTERNAL SYNC SOURCE SECONDARY REFERENCE TONE GENERATOR MAIN PHASELOCKED LOOP MISCELLANEOUS TONES MAIN SYSTEM BUSS Figure 5-6.
SYNCHRONIZATION OF DIGITAL FACILITIES ● ● ● 5-13 Yellow LED is on 2.7 seconds and off 0.3 seconds — the tone-clock synchronizer is in “active” mode and a DS1 is being used as a synchronization reference. Yellow LED is on 0.3 seconds and off 2.7 seconds — the tone-clock synchronizer is in “active” mode and the local oscillator is being used as a synchronization reference. Yellow LED is on continuously — the tone-clock synchronizer reset properly but did not receive translations update.
5-14 SYNCHRONIZATION OF DIGITAL FACILITIES With automatic reference switching enabled, most Generic 1 error counters are decremented by 1 every 15 minutes and initialized to zero on reaching the threshold value. The following conditions cause an offline reference to be restored to online. 1. The system configuration maintenance detects DS1 circuit pack sanity (for example, a DS1 has been reinitialized, reinserted into the carrier, and/or replaced). 2.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-15 references must be from a stratum 3 or stratum 2 source. The same basic considerations that apply to the selection of primary and secondary references also apply to these references. For System 85 and Generic 2, all functions previously performed by SCS synchronization software are now provided external to the switch — by the external clock.
5-16 SYNCHRONIZATION OF DIGITAL FACILITIES Figure 5-8. External Clock Private network applications that do not have digital connections to the public network will not provide the Reference 1 and Reference 2 inputs or the clock-input #1 and clock-input #2 circuit packs. These types of network applications are not allowed. For public-network applications, the clock-input circuit pack derives a 1.544M-bps clock signal from the reference.
SYNCHRONIZATION OF DIGITAL FACILITIES TN2131 CIRCUIT PACK COMPOSITE CLOCK OUTPUT #1 COMPOSITE CLOCK OUTPUT #2 COMPOSITE CLOCK CONVERTER SYNC CABLES LOS DETECTION ALARMS NOTE 1 SYNC OUTPUT NOTE 2 NOTES: 1 . Alarm signals are cabled to the cross-connect field. For System 85 and Generic 2, they are then cross-connected and cabled back to the maintenance or CPE interface. 2.
5-18 SYNCHRONIZATION OF DIGITAL FACILITIES NETWORK SYNCHRONIZATION AND ENGINEERING The primary goals of network synchronization are: ● To keep each digital network node reliable ● To make sure that each digital termination can meet the network objectives The procedures to achieve these goals include: ● Ensure that all nodes and facilities are synchronized to a single source of timing; or at the worst, to two or more stratum-2 timing sources ● Select the most reliable digital facilities to serve as
SYNCHRONIZATION OF DIGITAL FACILITIES 5-19 DIGITAL SERVING OFFICE EXTERNALLY REFERENCED NODES INTERNALLY REFERENCED NODES SYSTEM 85 OR 75 SYSTEM 85 OR 75 DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE Figure 5-11. External and Internal Reference Levels For externally referenced nodes, the operating company personnel will specify what the source of timing is on those links.
5-20 SYNCHRONIZATION OF DIGITAL FACILITIES If there one or more clocks in the network at the lowest stratum level, the following steps can be taken to determine the clock that should become the network reference clock source. Step 1: If there is only one digital switch in the network, that switch is to be the network reference clock master.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-21 RULE 2: A node may use a facility as a backup only if the node at the other end is not using that same facility as a backup. EXAMPLE FOR RULE 2 Figure 5-13, Proper Use of Backup Facilities, illustrates an application of rule 2 and proper use of a backup facility between nodes A and C. DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY (BACKUP) FREQUENCY REFERENCE Figure 5-13.
5-22 SYNCHRONIZATION OF DIGITAL FACILITIES DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY (BACKUP) FREQUENCY REFERENCY Figure 5-14. Improper Use of Backup Facilities Availability is defined as the ratio of the mean time between failures (the average time between successive system failures abbreviated MTBFs) to the sum of the MTBFs and the mean time to repair (the total maintenance time divided by the total number of failures during the same amount of time abbreviated MTTR).
SYNCHRONIZATION OF DIGITAL FACILITIES 5-23 Facility rank ordering is generally based on limited technical and operational information. It is recommended that facility selections be based on local field experience where available. In figure 5-14, Improper Use of Backup Facilities, only node C has both a primary and a secondary frequency reference. Node C derives its primary source from node B and its secondary timing source from node D.
5-24 SYNCHRONIZATION OF DIGITAL FACILITIES DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY (BACKUP) FREQUENCY REFERENCE Figure 5-16. Less Than Optimal Diverse Routing RULE 5: Obtaining both primary and secondary synchronization facilities from within the same transmission cable should be minimized. RULE 6: The total number of cascade node connections from the referenced node should be minimized.
SYNCHRONIZATION OF DIGITAL FACILITIES DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY (BACKUP) FREQUENCY REFERENCE Figure 5-17. Excessive Cascading DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY (BACKUP) FREQUENCY REFERENCE Figure 5-18.
5-26 SYNCHRONIZATION OF DIGITAL FACILITIES RULE 7: The number of nodes receiving synchronization reference from any given node should be minimized. EXAMPLE FOR RULE 7 Figure 5-19, Excessive Synchronization from One Node, shows an excess of synchronization from one node. If transmission facility linking nodes A-B fails, then nodes B, D, E, and F will lose their synchronization.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-27 DIGITAL TRANSMISSION FACILITY PRIMARY FREQUENCY REFERENCE SECONDARY (BACKUP) FREQUENCY REFERENCE Figure 5-20. Minimized Synchronization from One Node External-Reference Selection Rules There are seven rules for selecting external synchronization references. These rules are described next.
5-28 SYNCHRONIZATION OF DIGITAL FACILITIES AVAILABILITY OF SYNCHRONIZATION SOURCES Misconception 1 The local exchange company (LEC) can always provide the synchronization source. Fact 1 The LECs are not always subscribers to the AT&T reference frequency. Many end offices still use analog switches and D4-channel banks.
SYNCHRONIZATION OF DIGITAL FACILITIES 5-29 CONCLUSIONS ON SYNCHRONIZATION Make no assumptions regarding synchronization. Reverify items such as the availability of a synchronization source, the clock stratum, and compatibility of every T1 span. The best guarantee is written confirmation that the local exchange carrier, AT&T Communications, or other vendor will either synchronize to a System 75, System 85, Generic 1, Generic 2, or provide an appropriate synchronization reference.
5-30 SYNCHRONIZATION OF DIGITAL FACILITIES Line+Trunk Mode DS1/DMI-BOS (ANN35 or TN767 with TN555) Regarding the use of a line+trunk mode DS1/DMI-BOS for synchronization, the following point should be noted. Since it would be expected that a line+trunk mode DS1 would terminate at a class-5 or higher CO or at another switch, the line+trunk interface should be suitable for use as a primary or secondary clock reference (or to be the timing master for another switch).
SYNCHRONIZATION OF DIGITAL FACILITIES 5-31 The slip count provided by the interface should also be used in the process of choosing a healthy clock reference. However, when the interface terminates on a D4-channel bank (or equivalent) that is not locked to the AT&T reference frequency for its timing, then the interface should not be used for synchronization.
5-32 SYNCHRONIZATION OF DIGITAL FACILITIES
6. PORT TYPES/INSTALLATION COMPATIBILITIES This chapter describes the operating modes, installation compatibilities, and port types supported by DS1s. Because of differences between Generic 1 and Generic 2 software and hardware, appropriate distinctions are identified and separate sections provided. To date, DS1s have been well accepted. For both Generic 1 and Generic 2, DS1s were initially available for providing digital tie trunks.
6-2 PORT TYPES/INSTALLATION COMPATIBILITIES Generic 1, Generic 2, CEM, or D4-channel bank). The other line-interface unit connects to the NCTE and T1 facility. Dedicated data applications, both point-to-point and multipoint, can be connected to the CDM and inserted in selected channels. At the receive end, particular channels may be dropped from a DS1 or T1 facility by another CDM, or routed through a dedicated switch connection (DSC) as required. TABLE 6-1.
PORT TYPES/INSTALLATION COMPATIBILITIES 6-3 Application issues about the ANN11C and ANN11E are summarized below. a . It is not necessary to administer a DMI trunk type (108 or 109) or set the “Application Type” in procedure 260 to “DMI-BOS” to use DMI-BOS signaling. To get DMI-BOS, use an ANN11E and administer 24th-channel signaling on the ANN11E by setting field 8 in procedure 260 to 0. This causes ANN11E firmware to use the DMI-BOS signaling format for all trunk types administered on that ANN11E.
6-4 PORT TYPES/INSTALLATION COMPATIBILITIES Although the D4-channel bank is compatible with other devices using D4 standards, its most frequent application (from this document’s perspective) is as the interface between a DIMENSION® and DS1 or T1 facilities. The physical connections from the D4 to the switch are identical to connections used in any 4-wire analog tie trunk connection. The 4-wire E&M-ER tie trunk should be used because these units include variable attenuators in the range between 0 and 25.
PORT TYPES/INSTALLATION COMPATIBILITIES 6-5 interface, they differ in their analog voice interfaces (2- or 4-wire) and in the type of E&M (analog) signaling to which DS1/DMI signaling states are converted (type I, II, or III). A Generic 1 analog tie trunk is a 4-wire type I E&M trunk. Thus, a DS1/DMI tie-trunk port can be considered to be the same, and a 4-wire type I channel unit (or its equivalent) could be used to interface to a DS1/DMI tie-trunk port at the far end.
6-6 PORT TYPES/INSTALLATION COMPATIBILITIES backplane pins 208 and 224. For J58888N1 List 2 Modification C or later, the carrier is manufactured with the strap always installed on slots 0 and 13. The strap may be field installed on slots 5 and 18, as required. In line-only mode, a DS1 provides the functional equivalent of three analog OPS circuit packs, each containing eight ports. The line-only DS1 thus requires three carrier slots: one for the actual circuit pack and two more as virtual slots.
PORT TYPES/INSTALLATION COMPATIBILITIES 6-7 A carrier equipped with two line+trunk DS1s will have four slots available for other port boards in physical slots 3, 8, 16, and 21. Figure 6-2, Physical and Virtual Carrier Slot Relationships, Line+Trunk Mode, shows the carrier slots, physical versus virtual slot locations, and their relationship to line+trunk-mode use.
6-8 PORT TYPES/INSTALLATION COMPATIBILITIES SLOT NUMBERS 0 1 2 3 7 8 LEFT HALF CARRIER 5 6 13 14 15 16 19 20 21 EMPTY OTHER 18 RIGHT HALF CARRIER LINE-ONLY ANY EMPTY DS1 OR DM1 INTERFACE PORT CIRCUIT PACK EQUALS ACTUAL OPS VIRTUAL OPS EQUALS VIRTUAL OTHER OPS CIRCUIT #1 #2 #3 PACKS (NOTE) OPS PORTS/CARRIER SLOT OPS #0 OPS #1 OPS #2 OPS #3 EQUALS OTHERS OPS #4 OPS #5 OPS #6 OPS #7 NOTE: Any half carrier that does not contain a line+trunk mode circuit pack can have 1 or 2
PORT TYPES/INSTALLATION COMPATIBILITIES CARRIER SLOTS 0 2 1 3 13 14 15 16 E M P T Y E M P T Y E M P T Y OTHER ANALOG PORT CIRCUIT PACK 5 6 18 1 9 20 E M P T Y E M P T Y LINE+TRUNK MODE OR TRUNK MODE CIRCUIT PACK 7 8 2 1 OTHER ANALOG PORT CIRCUIT PACK EQUALS VIRT L/T #1 VIRT L/T #2 VIRT L/T #3 OTHER ANALOG PORT CIRCUIT PACK VIRT L/T #5 ACTUAL L/T #4 VIRT L/T #6 OTHER ANALOG PORT CIRCUIT PACK PORT NUMBER TRUNK PORT TRUNK PORT 1 0 PORT FAMILY (A) (NOTES 1, 2) EQUALS TRUNK
6-10 PORT TYPES/INSTALLATION COMPATIBILITIES Line+Trunk Mode Port Grouping Rules Administration permits assignment of DS1 trunk types in consecutive groups of two. These consecutive groups of two ports are called a port family. The real DS1/DMI and each virtual line+trunk mode slot contain two port families (four ports). The first port family, family A, is composed of ports 0 and 1. The second port family, family B, is composed of ports 2 and 3.
PORT TYPES/INSTALLATION COMPATIBILITIES 6-11 interface. They differ in their analog voice interfaces (2- or 4-wire) and in what type of E&M (analog) signaling to which the DS1/DMI signaling states are converted (type-I, II, or III). A System 85 analog tie trunk is a 4-wire type-I E&M trunk. Thus, a DS1/DMI tie-trunk port can be considered to be the same, and a 4-wire type-I channel unit (or its equivalent) could be used to interface to a DS1/DMI tie trunk port at the far end.
6-12 PORT TYPES/INSTALLATION COMPATIBILITIES Loop-Start CO Trunk Generic 2 does not provide an analog equivalent of a DS1 loop-start CO trunk. It is only available as a digital trunk. Use of the loop-start CO trunk is not recommended because of inherent glare and disconnect supervision problems associated with this trunk type. The DS1/DMI loop-start CO trunk appears to the switch software the same as a ground-start CO trunk.
PORT TYPES/INSTALLATION COMPATIBILITIES 6-13 channel signaling bits must be passed directly between two DS1/DMI ports without any switch processing software interaction. Any DS1/DMI port, regardless of its operating mode, may be switched into its corresponding transparent mode through administration. Additional details about DS1/DMI port types can be found in the DSC feature reference.
6-14 PORT TYPES/INSTALLATION COMPATIBILITIES Port Grouping Rules There are no port grouping restrictions for DMI-MOS trunks. Supported Port Types The DMI-MOS trunks are used to provide high-speed (up to 64K-bps) data connectivity to a host computer. The DMI-MOS trunks are restricted to two types: ● Wink-in/wink-out ● Wink-in/auto-out The ANN35 supports several other trunk types when used for ISDN applications; refer to table 6-1, Supported Digital Facilities.
7. ADMINISTRATION OPTIONS AND REQUIREMENTS Administering DS1/DMI/ISDN-PRI services involves configuring the software translations to know what the equipment-carrier configuration and circuit pack types are and what services are to be done. For System 85 R1 through R2V3, switch administration may be done from the system-management terminal (SMT), maintenance and administration panel (MAAP), or Remote Maintenance, Administration, and Traffic System (RMATS)-II.
7-2 ADMINISTRATION OPTIONS AND REQUIREMENTS Generic 1 may be administered from a Manager I terminal or by the Initialization and Administration System (INADS).
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-3 SYSTEM 85 (R2V1 THROUGH R2V4) This part describes administration options and requirements for System 85 R2V1 through R2V4. Procedure 275 Word 4: ISDN Service — Enable/Disable Procedure 275 is used to translate the system class-of-service (COS) assignments as well as several other miscellaneous services and features. Word 4 provides the capability for enabling and disabling the ISDN service.
7-4 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Procedure 276 Word 1: Other Feature Groups Procedure 276, word 1, may be displayed to verify which of the optional networking features (such as AAR or DCS) are enabled for the switch. Figure 7-2, Procedure 276 Word 1: Feature Group COS (System 85 R2V4), depicts this procedure. ENHANCED MODE - PROCEDURE: 276, WORD: FEATURE GROUP CLASS OF SERVICE 1. 2. 3. 4. 1 Standard Network: Multipremise: DCS: AUTOVON: 5. Call Vectoring: 6. Tenant Services: 7.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: CARRIERS CARRIER LOCATION 1. Module: 2. Cabinet: 3. Carrier: 250, WORD: 7-5 1 LOCAL RMI LOCATION 12. Module: 13. Cabinet: 14. Carrier: Slot: 15. 4. Carrier Type: MODULE 5. 6. 7. 8. CONTROL I/O: PDS: Duplicated: TMS: 9. Port Electrical Carrier: 10. 11. TMS Electrical Carrier: SC Equipped: Connected to CC0 ON-LINE enter command: Figure 7-3.
7-6 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 4 V1-V4 Translates a particular type of carrier (such as DS1/MFAT, module control, or TMS) to the equipment location identified by fields 1-3.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-7 System 85 R2V1 and V2 only provide trunks. However, R2V3 and V4 provide trunks, analog OPS lines, and DMI-BOS trunks. System 85 R2V4 (and later versions) provides DMI-MOS trunks; refer to table 7-1, DS1 Administration — Channel Versus Line Assignments. Depending on the application type (encode) translated, there may be additional administration, slot, and port grouping restrictions.
7- 8 Field 5 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 V1-V2 For DS1, 0 is the only choice. V3-V4 This field is reserved for further use and contains a dash (-). Field 6 V1-V4 Used for assigning the framing format. The choices are D4 and ESF (previously referred to as Fe).
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 8 7-9 V1-V4 Offers the choice of 24th-channel or robbed-bit signaling (RBS). The choice of signaling method used is dependent on the application. The DS1/DMI-BOS applications may be translated for either option. However, ISDN-PRI applications always require that 24th-channel signaling be selected. With RBS, information is transmitted in the least-significant bit (LSB) position of each channel every six frames.
7-10 Field 9 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 V1-V4 Determines which line-coding format will be used to forcibly ensure that the data meets T1-carrier ones-density requirement. The two choices are: ● Zero code suppression (ZCS) ● Bipolar 8 zero code suppression (B8ZS) For a 56K-bps call over a robbed-bit facility, use the ACCUNET switched digital service.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 10 7-11 V1-V4 This options enables (1) or internal high-accuracy is normally based on an hardware events (such as software controls. or disables (0) switching between the primary, secondary, clock. The decision to switch from one source to the other internal slip count calculation (software record). However, primary link failures) may take precedence over any Slips are caused by differences in clock frequencies.
7-12 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 slip count of 44 or less and if the secondary and 50% of those DS1s that are enabled for slip enable have reached their maximum slip count of 88, then a switch back to the primary is made. Field 11 V1-V4 Offers the options external loop not available (0) or external loop available (1). The external loop available option should only be selected when demand diagnostic maintenance is done and then only after a DS1 has been busied out.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 14 7-13 V3-V4 Field encodes and their descriptions are: 0 Selects the DS1/DMI-BOS channels used for both trunks and lines; the latter is frequently referred to as OPS. Each DS1/MFAT carrier will support a maximum of two DS1s (slots 5 and 18). The ACCUNET switched digital service can be provided by setting up a trunk group with encode 109. However, a DS1 must be optioned for RBS (procedure 260, field 8).
7-14 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Also, the facility cannot be used as a synchronization reference. When a DS1 is administered for lines (OPS), it provides 24 channels that terminate in a remote D4-channel bank, CDM, or their equivalent. Each analog line circuit pack provides eight circuits. Therefore, one DS1/OPS functionally replaces three analog circuit packs. Each DS1 or multifunction analog terminal (MFAT) carrier will support a maximum of four DS1s (OPS applications).
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 15 7-15 V4 Only Some applications require that the contents of the D-channel be inverted to guarantee that the minimum ones-density be maintained. This field shows whether the signaling channel is inverted. Field encodes and their descriptions are: - (Dash) means ZCS chosen in procedure 260. This is the default when ZCS is chosen (this automatically inverts the D-channel). The dash is appropriate for all applications of the ANN11_ circuit pack.
7-16 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Procedure 262 Word 1: ISDN Board Parameters Procedure 262 is used in System 85 R2V4 and Generic 2 to administer DMI-MOS (ANN35) for other service/facility options (DMI-MOS/ISDN-PRI only). Figure 7-5, Procedure 262 Word 1: ISDN Board Parameters, depicts procedure 262, word 1. ENHANCED MODE - PROCEDURE: 262, WORD: ISDN BOARD PARAMETERS EQUIPMENT 1. 2. 3. 4. PRI 1 LOCATION Module: Cabinet: Carrier: Slot: PARAMETERS 5. Interface Type: 6.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 5 7-17 V4 Only Assigns the interface type or side. The default option is (0) for user side. Alternately, a (1) should be administered for network side. The configuration of the network should be analyzed to determine if the (0) option is appropriate. For MOS-type facilities (such as DMI-MOS and ISDN-PRI), each link must be segmented into user and network sides.
7-18 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 7 V4 Only This field will accept encodes within the range of 0 through 126. However, all point-to-point (nonswitched) links, such as an System 85 R2V4 DMI-MOS link to a host computer, must be administered with encode 0. Encodes 1 through 126 are not used at this time. Field 8 V4 Only The field will accept encodes ranging from 0 through 255, corresponding to 1-second intervals for an elapsed time of up to 4 minutes and 15 seconds.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 354, WORD: NPA-NXX ASSIGNMENT 7-19 3 1. NPA-NXX Designator: 2. NPA: 3. NXX: 4. Thousand's Digit: Connected to CC0 ON-LINE enter command: Figure 7-6. Procedure 354 Word 3: NPA – NXX Assignment (System 85 R2V4) Field 1 This field should be translated for both private-and public-network connections. The NPA-NXX designator is a 2-digit field and must be within the range of 1 through 99.
7-20 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 4 of procedure 000, word 4, need not be translated when the switch does not transmit SID or connected number to the network (public or private). If the switch contains more than one office code, multiple NPA/NNX designators may be needed. Figure 7-7, Procedure 000 Word 4: NPA–NXX Partition Assignment (System 85 R2V4), depicts procedure 000, word 4. ENHANCED MODE - PROCEDURE: 000, WORD: 4 EXTENSION NPA-NXX/PARTITION ASSIGNMENT 1.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-21 ENHANCED MODE - PROCEDURE: 210, WORD: 2 CONSOLE ASSIGNMENTS - ATTENDANT PARTITIONS 1. Console Number: 2. Attendant Partition: 3. Control: LDN: 4. NPA-NXX Designator: 5. Connected to CC0 ON-LINE enter command: Figure 7-8. Procedure 210 Word 2: Attendant Partition Assignments (System 85 R2V4) Field 1 Translates a console number. Permitted encodes are any 2-digit number within the range of 1 through 40.
7-22 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Procedure 010 Word 4: Line Side (B-Channel) BC and ISDN Routing Options Figure 7-9, Procedure 010 Word 4: Terminal COS Restrictions (System 85 R2V4), depicts procedure 010, word 4. ENHANCED MODE - ROCEDURE: 010, WORD: 4 EXTENSION CLASS OF SERVICE - RESTRICTIONS 1. Class of Service: 2. Maximum Precedence Level: 3. Bearer Capability: 4. ISDN Routing: Connected to CC0 ON-LINE enter command: Figure 7-9.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 3 7-23 This field is used to populate the BC code IE. All endpoints (such as analog lines and DCP voice terminals) must show their information transfer requirements in terms of a BC code. The BC code is the mechanism by which specialized routing is provided for various categories of calls. NOTE: Once the BC code is assigned, it is fixed and does not change with different calls.
7-24 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 100, WORD: TRUNK GROUP TRANSLATION 1 1. Trunk Group: DIAL ACCESS CODE/TRUNK ID CODE 2. 3. 4. 5. Digit Digit Digit Digit 1: 2: 3: 4: 6 . Trunk Type: 7. Dial Access Restriction: 8 . Personal CO Line Appearance: DISPLAY ONLY 9. Signaling Type: Connected to CC0 ON-LINE enter command: Figure 7-10. Procedure 100 Word 1: Trunk Group Translations (System 85 R2V4) Field 1 Assigns a trunk group number.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-25 Incoming ISDN dynamic trunk type 120 calls (to a System 85) may or may not specify an NSF. Generally, incoming calls from the public network will specify an NSF while calls from the private network will not specify an NSF. For example, if the NSF is delivered and it shows an SDN call, then the System 85 defaults to trunk type 46. For all other incoming NSF values, the switch will default to trunk type 30.
7-26 ADMINISTRATION OPTIONS AND REQUIREMENT’S — SYSTEM 85 For an ISDN trunk group, a dynamic trunk type (120) can be assigned to the group. This trunk type allows the group to process calls with a different trunk type on a call by call basis. For example, one incoming call over the group may expect station number digits (as does a MEGACOM call), while the next call over the group may expect a network number (as does an SDN call).
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 100, WORD: 7-27 3 TRUNK GROUPS - MODEM POOLING AND BCCOS 1. Trunk Group: DATA RATE 2. 3. 4. 5. 6. 7. 8. 9. 64K: 56K: 19.2K: 9.6K: 4.8K: 2.4K: 1.2K: 300: LOW: 10. MODEM 13. 14. 15. 16. 17. POOLING Originate Mode: Answer Mode: Modem Type: Clock: First Choice: Test Type: 18. 19. Host Access Clock: 11. SYCHRONOUS: DUPLEX: 12. Connected to CC0 ON-LINE enter command: Figure 7-11.
7-28 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 100, WORD: 3 TRUNK GROUPS - SIGNALING AND OTHER PARAMETERS Trunk Group: 1. 2. Signaling Type: Glare: 3. Retry: 4. 5. Outgoing Maintenance Busy Out Seizure: Incoming Permanent Seizure: 6. Failure Threshold: 7. Optional ISDN Information Inhibited: 8. DISPLAY ONLY 9. Trunk Type: Connected to CC0 ON-LINE enter Figure 7-12.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 4 7-29 Retry permits multiple attempts to seize a busy trunk from the specified trunk group. This field is primarily applicable for those trunk groups routed over analog facilities and use one of the following trunk types: 41, 42, 43, 46, or 47. Depending on the particular configuration, RETRY may or may not be applicable for ISDN applications. Field encodes and their descriptions are: 0 When multiple retry is not desired RETRY NOT ACTIVE.
7-30 Field 8 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Selects whether the optional ISDN information is transmitted and access to other ISDN network features is desired.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: TRUNK Trunk Group: 1. 2. Balance: Battery Reversal: 3. 4. Incoming Prefix Digit: 5. DCS: 6. Touch-Tone In: 7. Touch-Tone Out: 8. SMDR Active: AIOD Billing Number: 9. TIMED GROUP 101, WORD: 7-31 1 CHARACTERISTICS 15. APLT Features Allowed: 16. Disconnect Supervision: 17. AVD: RECALL 10. Time: 11. Level: SMDR Variable Timer: 12. 13. Pad Group: 14. Tie Toll: Connected to CC0 ON-LINE enter command: Figure 7-13.
7-32 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Fields 6-7 Selects in/out touch-tone availability. Field encodes and their descriptions are: 0 When only rotary pulses are received via the trunk group 1 When either rotary pulses or tough-tone can be accepted NOTE: The ISDN-PRI applications use the D-channel to transmit and receive dialed digits. Dialed digits are transmitted as ASCII characters. Therefore, for ISDN applications, this field is ignored; either option may be translated.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 15 7-33 The APLT type services are not applicable in the ISDN-PRI environment. Therefore, for trunk groups using ISDN-PRI facilities, this field is ignored. Refer to Appendix C, Administrative Procedure Summary, for more information about the dynamic 120 trunk types.
7-34 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 103, WORD: NETWORK TRUNK GROUP TRANSLATION 1. 2. 3. 4. 5. 6. 7. 8. 9. 1 Trunk Group: Facility Restriction Level: Network Trunk: Main/Tandem: Incoming Tie to AAR/ARS or APLT: Authorization Code Required: Bridge-On Allowed: Trunk Reservation Limit: AAR/ARS Prefix: Data Protection (Permanent): 10. Remote Access Echo Suppressor: 11. AAR Conditional Routing: 12. 13. Second TCM: 14. Digit Collection: 15.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 15 7-35 V4 Only Used for non-ISDN trunk groups that interwork to ISDN trunk groups. Therefore, field 15 only applies to non-ISDN trunk groups. Generally, trunk groups can use both analog and ISDN-PRI (digital) transmission facilities. Any restrictions and compatibility requirements are conveyed as information known as the BC code. This field is used to populate the BC IE.
7-36 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 116, WORD: DS1 AND ISDN TRUNK ASSIGNMENTS EQUIPMENT 1 LOCATION 1. Module: 2. Cabinet: 3. Carrier: Slot: 4. 5. Circuit: 6. Trunk Group: 7. Night Terminal: 8. Disable Signaling: 9. AIOD Equipment Number: Interface Endpoint: 10. Connected to CC0 ON-LINE enter command: Figure 7-15.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-37 TABLE 7-3. DS1/ISDN-PRI Administration — Channel Versus Trunk Assignments DS1 Channel Slot/Circuit DS1 Channel Slot/Circuit 1 2 3 4 5 6 7 8 9 10 11 12 */0 */1 */2 */3 */4 */5 */6 */7 */8 */9 */1O */11 13 14 15 16 17 18 19 20 21 *+1/0 *+1/1 *+1/2 *+1/3 *+1/4 * +1/5 *+1/6 *+1/7 *+1/8 *+1/9 22 23 24 *+1/10 *+1/11 LEGEND: * Any slot for the TN767 except slot number one in the universal port carrier. *+ 1 The slot next to the TN767 or TN555.
7-38 Field 8 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Disables a channel’s signaling. Field encodes and their descriptions are: – (Dash) used when ISDN is enabled. 0 Used when signaling is enabled. This is the default option (not used with ISDN). 1 Used when signaling is disabled. Use this with dedicated switched connection to disable signaling for a tie trunk. The signaling bit then can be used as a data bit, allowing the full 64K-bps to be used for data. Field 9 Not applicable for ISDN-PRI.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-39 ENHANCED MODE - PROCEDURE: 012, WORD: 1 NAME DATABASE - NAME TO BE DISPLAYED 1 . Extension, VDN, or Trunk Group: Type: 2. Display Start: 3. 4 . Outgoing Trunk Display: Copy Mode: 5. 6 . Extension, VDN, or Trunk Group to Copy or Share: DISPLAY ONLY 7. Characters In Name 8. Shared Primary Extensions or Trunk Groups Associated Extension Name Assigned 9. Connected to CC0 ON-LINE enter command: Figure 7-16.
7-40 Field 4 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 The main function of this field is to provide some administration control over what is displayed on the voice terminals digital display. Field encodes and their descriptions are: – (Dash) for all incoming only trunk groups. 0 Used when the user (extension) does not want the outgoing trunk group name displayed but does desire the dialed number to remain on the display.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 012, WORD: NAME DATABASE - ENTRY 7-41 2 1. Segment: CHARATER ENCODES 2. Character 1: 3. Character 2: 4. Character 3: 5. Character 4: 6. Character 5: 7. Character 6: 8. Character 7: 9. Character 8: 10. Character 9: 11. Character 10: Connected to CC0 ON-LINE enter command: Figure 7-17. Procedure 012 Word 2: Name Database Entry (System 85 R2V4) Field 1 Identifies one-of-three 10-character fields.
7-42 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 012, WORD: NAME DATABASE COMPACTION 3 1. Compact: DISPLAY ONLY Names That Can Yet Be Assigned: 2. 3. Words Available: 4. Words to Be Gained by Compacting: Connected to CC0 ON-LINE enter command: Figure 7-18. Procedure 012 Word 3: Name Database (System 85 R2V4) Field 1 Assigns whether (1) or not (–) to compact the name database. Fields 2-4 Are display only and serve to show status of the database.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 309, WORD: ARS - ROUTE TABLES 7-43 1 1. ARS Plan: 2. Pattern Number: 3. Preference Number: 4. Trunk Group: 5. Facility Restriction Level: 6. Warning Tone: 7. Distant Area Code (NPA): 8. Send 1 For Toll: 9. Toll Table Index: 10. Number of Digits Deleted: 11. Digit Collect (DC) Signal Ignore: 12. IXC ISDN Network Identifier: Connected to CC0 ON-LINE enter command: Figure 7-19.
7-44 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Procedure 309 Word 5: ARS and ISDN Trunk — Network Characteristics This procedure is required for translating ISDN trunk groups into the ARS plan. Figure 7-20, Procedure 309 Word 5: ARS and Transit Network Identifiers (System 85 R2V4), depicts this procedure. ENHANCED MODE - PROCEDURE: 309, WORD: 5 ARS - ISDN AND BEARER CAPABILITY COS 1. ARS Plan: 2. Pattern Number: 3. Preference Number: 4. ISDN Dynamic Trunk Type: 5.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 4 7-45 Translates ISDN trunk type 120 only. Recall that for ISDN applications the trunk type may be translated as fixed (that is, one specific type) or dynamic (which may include those from the fixed category). Generally, the trunk type selected will depend on the network service or feature value, which is translated in field 5. Table 7-4, Network Service/Feature Options, shows the relationships. TABLE 7-4.
7-46 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Procedure 321 Word 1: AAR Assignments and IXC/ISDN Network Identifier This procedure is used for translating/controlling the AAR feature. Figure 7-21, Procedure 321 Word 1: AAR (System 85 R2V4), depicts the procedure. ENHANCED MODE - PROCEDURE: 321, WORD: AAR - ROUTE TABLES 1 1. Pattern Number: 2. Preference Number: 3. Trunk Group: 4. Facility Restriction Level: Warning Tone: 5. Off Net: 6. Number of Digits Deleted: 7. 8.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-47 Specifies either the number (designation) of the interexchange carrier (IXC) or the ISDN Network Service Identifier for the trunk group. The IXC/ISDN network identifier enables the switch to provide equal access capability by populating either the NSF IE or the Transit Network Selection IE. If sending an NSF IE and a particular IXC vendor number is specified in this field, that entry is included in the NSF IE.
7-48 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 Field 1 Specifies the AAR pattern number. Permitted encodes are 1 through 640. Field 2 Specifies the AAR preference number. Permitted encodes are sequential numbers within the range of 1 through 16. Field 3 Translates the ISDN trunk type. Recall that for ISDN applications the trunk type may be translated as fixed (that is, one specific type) or dynamic (which may include those from the fixed category).
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 7-49 ENHANCED MODE - PROCEDURE: 107, WORD: 1 ATMS - TERMINATING TEST LINE ASSIGNMENT 1. Trunk Group: 2. Test Line Type: TTL TELEPHONE DIGITS 3. 4. 5. 6. 7. 8. 9. 10. Digit Digit Digit Digit Digit Digit Digit Digit 1: 2: 3: 4: 5: 6: 7: 8: 11. 12. 13. 14. 15. 16. 17. 18. Digit Digit Digit Digit Digit Digit Digit Digit 9: 10: 11: 12: 13: 14: 15: 16: DISPLAY ONLY 19. Trunk Type: Connected to CC0 ON-LINE enter command: Figure 7-23.
7-50 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85 ENHANCED MODE - PROCEDURE: 108, WORD: 1 ISDN TERMINATING TEST LINE ASSIGNMENT 1. Trunk Group: TERMINATING TEST LINE TELEPHONE DIGITS 2. 3. 4. 5. 6. 7. 8. 9. Digit Digit Digit Digit Digit Digit Digit Digit 1: 2: 3: 4: 5: 6: 7: 8: 10. 11. 12. 13. 14. 15. 16. 17. Digit 9: Digit 10: Digit 11: Digit 12: Digit 13: Digit 14: Digit 15: Digit 16: DISPLAY ONLY 18. Trunk Type: Connected to CC0 ON-LINE enter command: Figure 7-24.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-51 GENERIC 2 Depending on whether the switch provides private network ISDN service or public network ISDN services, whether the switch functions as an endpoint or as a tandem node, will determine whether other features should be administered before ISDN-PRI. Primarily, these other features include tandem tie trunk access, trunk-to-trunk calling, and miscellaneous trunk restrictions.
7-52 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 14 For Generic 2, field 14 must always be translated. Field encodes and their descriptions are: – (Dash) required when ISDN is not provided. Current policy is to always ship ISDN-PRI software with the switch. However, the administration software still provides the option to assign this software as unprovided. 0 Must be translated when ISDN is provided but not active DISABLED. 1 Must be translated to ENABLE ISDN service.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-53 Procedure 250 Word 1: SC/DS1 — Carrier Designation This procedure is used to assign the equipment carriers to a module and cabinet. Additionally, it is used to assign the type of carrier, the carrier port electrical number, and whether the carrier is equipped with an SC. Figure 7-27, Procedure 250 Word 1: System Configuration — Carriers (Generic 2), depicts this procedure.
7-54 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 4 Translates a particular type of carrier (such as DS1/MFAT, module control, or TMS) to the equipment location identified by fields 1-3.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: 260, WORD: 7-55 1 DS1/ISDN AND RG CIRCUIT PACK ASSIGNMENTS EQUIPMENT 1. LOCATION SC 12. Equipment Type: 13. SC Reference: Module: 2. Cabinet: 3. Carrier: 4. Slot: 14. Application: 15. Bit SIGNALING 16. Framing: 17. 7. 23B+D/24B: 18. 8. 24C/RBS: 19. 9. ZCS/B8ZS: 6. Inversion: Link Type: SA/FX: Loop Length: E Bit: 10. Slip Enable: 11. External Loop: DISPLAY ONLY 20.
7-56 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Fields 1-4 Assigns the circuit pack to an equipment location. Table 7-6, Equipment Parameters and Permitted Translation Encodes, depicts the permitted ranges for these encodes. TABLE 7-6.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 7 7-57 This field is functionally equivalent to the Per-Channel Signaling and common channel signaling options used with System 85 R2V4. However, the terms have been changed to facility associated signaling (FAS) and NFAS. This field is used to specify the method used to constructed signaling bits for each DS0 B-channel. The option (23B + 1D) is also referred to as FAS. This is the default option (field encode 0).
7-58 Field 9 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Assigns the line coding format that will be used to forcibly ensure that the data meets T1-carrier ones-density requirement. Field encodes and their descriptions are: ● Zero Code Suppression (ZCS) ● Bipolar 8 Zero Code Suppression (B8ZS). The ZCS line-coding format (restricted) scans each byte for the all-zeroes octet and, on detecting this bit sequence, substitutes a one for the zero in bit position 2.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 10 7-59 Offers the options slip enable (1) or disable (0). This option enables/disables collection of slip data to support excessive slip rate based on switching between the primary, secondary, or internal high-accuracy clock. The decision to switch from one source to the other is normally based on an internal slip count calculation (software record).
7-60 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Criteria for Switching Back to the Primary At the end of the 1-hour interval, the slip count is analyzed. If the primary slip count is less than 2, then a switch back to the primary is made. Also, if the primary has a slip count of 44 or less and if the secondary and 50% of those DS1s that are enabled for slip enable have reached their maximum slip count of 88, then a switch back to the primary is made.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 13 7-61 Assigns whether a DS1 facility (translated in field 12) is to be used as the primary or secondary synchronization source to the switch. Field encodes and their descriptions are: 0 Assigns that the facility is not used as a synchronization source 1 Assigns that the facility is the primary synchronization source 2 Assigns that the facility is the secondary synchronization source NOTE: The primary must be administered before the secondary.
7-62 Field 14 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field encodes and their descriptions are: 0 Assigns that the DS1/DMI-BOS channels can be used for both trunks and lines (MIXED); the latter is frequently referred to as off-premises stations (OPS). 1 Assigns that the interface is used to provide DMI-BOS trunks. The DMI-BOS trunk groups are defined using procedure 100, word 1 (encode 108 and/or 109).
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 15 7-63 Some applications require that the contents of the signaling channel or the ISDNPRI D-channel be inverted to guarantee that the minimum ones density be maintained. This field shows whether the signaling channel is inverted or not. Field encodes and their descriptions are: – (Dash) not applicable or ZCS line coding is translated in field 9. The dash is appropriate for all applications of the ANN11 circuit pack.
7-64 Field 18 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Loop length refers to the total cable distance between the switch and the NCTE, CDM, BCM32000, DSX-1 cross-connect, and T1 office repeater. Traditional modules may contain the ANN11 and/or ANN35 circuit packs. Both circuit packs contain DIP switches for setting the compensation value, refer to table 3-1, System 85 Traditional Module Equalizer Settings (Metallic Cable).
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-65 This display-only field serves to show which cables contain which synchronization cables. Field 20 Procedure 262 Word 1: Additional DMI-MOS/ISDN-PRI Facility Options Procedure 262 is used to administer the ANN35 and TN767 circuit packs. Figure 7-29, Procedure 262 Word 1: Additional DMI-MOS/ISDN-PRI Facility Options (Generic 2), depicts this procedure. ENHANCED MODE - PROCEDURE: ISDN EQUIPMENT LOCATION BOARD 262, WORD: 1 PARAMETERS 13.
7-66 Field 6 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Assigns the interface type or side. The default option is (0) for user side. Alternately, a (1) should be administered for network side. The configuration of the network should be analyzed to determine whether the (0) option is appropriate. For MOS facilities (such as DMI-MOS and ISDN-PRI), each link must be segmented into user and network sides.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-67 Field 9 The field accepts encodes from 0 through 255, which correspond to 1 second intervals for a maximum elapsed time of 4 minutes and 15 seconds. The default value for this T203 timer is 30 (30 seconds). This timer functions to monitor the facility data link and specifies the maximum time allowed without frames being exchanged on a data link layer connection. Field 10 The field accepts encodes from 0 through 255, which correspond to 0.
7-68 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: ISDN NFAS/D-CHANNEL 262, WORD: 2 BACKUP 1. D-Channel Group Number: PRIMARY D-CHANNEL EQUIPMENT LOCATION 2. Module: 3. Cabinet: 4. Carrier: 5. Slot: BACKUP D-CHANNEL EQUIPMENT LOCATION 6 . Module: 7. Cabinet: 8. Carrier: 9. Slot: DISPLAY ONLY 10. Number of Trunks Assigned to This D-Channel Group: Connected to CC0 ON-LINE enter command: Figure 7-30.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-69 Procedure 262 Word 3: ISDN-PRI Codeset Map Assignments Depending on the terminating switch it may be necessary to administer a Codeset Map Assignment and convert from one codeset or codepoint to a different codeset or codepoint. This administration assignment is required for ISDN-PRI links originating on a Generic 2 and terminating on a System 85 R2V4.
7-70 Field 7 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Assigns whether hyperactivity management will be enabled for the ISDN-PRI link. Hyperactivity is defined as erratic behavior by the D-signaling channel. Typically, a hyperactive link will generate an excessive amount of meaningless traffic. Excessive D-channel traffic may overload the module processor and degrade system performance. Field encodes and their descriptions are: – (Dash) not applicable.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-71 Procedure 280 Word 1: ISDN-PRI Receive/Transmit Codeset Mapping This procedure is used to translate Codeset Mapping parameters. Figure 7-32, Procedure 280 Word 1: ISDN-PRI Receive/Transmit Codeset Mapping (Generic 2), depicts this procedure. ENHANCED MODE - PROCEDURE: ISDN CODESET 280, WORD: 1 MAPPING 1. Codeset Map Number: 2. Incoming/Outgoing: MAPPED FROM CODESET/INFORMATION 3. ELEMENT Codeset: 4 .
7-72 Field 3 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Specifies a mapped from codeset number. Permitted encodes are 0 to 7. These numbers correspond to the respective codesets on a number-per-number basis. NOTE: Currently, codeset 1 through codeset 5 are reserved for future use. Thus, only encodes 6 and 7 are applicable for the codeset fields. If field 2 is translated (0) for incoming then encode (7) is appropriate for field 3.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-73 NOTE: This word need not be translated unless the application requires that SID or the connected number be transmitted to the network. ENHANCED MODE - PROCEDURE: NPA-NXX 1. NPA-NXX 354, WORD: 3 ASSIGNMENT Designator: NPA: 2. NXX: 3. Thousand's 4. Connected enter to CC0 Digit: ON-LINE command: Figure 7-33.
7-74 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 000 Word 4: NPA-NXX Index Designator Depending on how the switch is used, procedure 000, word 4, may or may not be translated. Specifically, word 4, field 4, is used for partitioning, ISDN, or both, and must be translated when: a. The switch transmits SID or connected number to the network b.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-75 Field 3 Assigns the extension partition identification for the tenant services feature. This number associates the single or block of extension numbers to a particular ISDN facility (NPA-NXX Designator). Field 4 Associates an NPA-NXX Designator with the previously defined extension.
7-76 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 3 Assigns the one console in the attendant partition that will be the controlling console. All other members of this group must have control denied. Field encodes and their descriptions are: 0 For all but the controlling console 1 Only for the controlling console Field 4 Assigns or associate the LDN with a particular console or console partition. The number is dependent on the switch or private network numbering plan.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-77 ENHANCED MODE - PROCEDURE: 014, WORD: 1 BEARER CAPABILITY CLASS OF SERVICE - CALL OPTIONS 1. Bearer Capability COS: 2. Transport Mode: 3. Information Type: DEFAULT CAPABILITIES 14. Transport Mode: 15. Information Type: 16. Bearer Capability: CALL TYPES AND ACTION TAKEN 4. Voice: 5. Voice Grade Data: 6. Mode 0: 7. Mode 1: 8. Mode 2: 9. Mode 3: 10. Unknown Digital: 11. Unknown Analog: 12. Mode 3/2: 13. X.
7-78 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Fields 4-13 The translation parameters administered for fields 4 through 13 determine what actions the switch will take for the BCCOS specified in field 1. Regarding Generic 2, it is important to remember that the administration (of the BCCOS) determines when a modem pool member is added and not the particular trunk type.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCE MODE - PROCEDURE: 014, WORD: 7-79 2 BEARER CAPABILITY CLASS OF SERVICE - DATA OPTIONS 1. Bearer Capability COS: DATA RATE 2. 64000 bps: 3. 56000 bps: 4. 19200 bps: 5. 9600 bps: 6. 4800 bps: 7. 2400 bps: 8. 1200 bps: 9. 300 bps: 10. Low Speed: 11. Synchronous: 12. Duplex: 13. Clock: 14. Default Data Rate: Connected to CC0 ON-LINE enter command: Figure 7-37.
7-80 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 010 Word 4: Line Side (B-Channel) BC and ISDN Routing Options Figure 7-38, Procedure 010 Word 4: Line Side (B-Channel) BC and ISDN Routing Options, depicts this procedure. ENHANCED MODE - PROCEDURE: 010, WORD: 4 EXTENSION CLASS OF SERVICE - RESTRICTIONS Class of Service: 1. 2. Maximum Precedence Level: 3. ISDN Routing: Connected to CC0 ON-LINE enter command: Figure 7-38.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 3 7-81 All endpoints (such as analog lines and DCP voice terminals) must show their information transfer requirements in terms of a BC code. The BC code is the mechanism by which specialized routing is provided for various categories of calls. NOTE: Once the BC code is assigned, it is fixed and does not change with different calls.
7-82 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: TRUNK GROUP 100, WORD: 1 TRANSLATION 1. Trunk Group: DIAL ACCESS CODE/TRUNK ID CODE 2. 3. 4. 5. Digit Digit Digit Digit 1: 2: 3: 4: 6. Trunk Type: 7. Dial Access Restriction: 8. Personal CO Line Appearance: 9. Public DISPLAY Network Access/Egress: ONLY 10. Signaling Type: Connected to CC0 ON-LINE enter command: Figure 7-39.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 6 7-83 Defines the trunk type of a specific trunk group. The ISDN-PRI facilities may be used to support several different trunk types. These may include both conventional trunk types as well as the ISDN-dynamic trunk type. An important point to remember is that the particular service application and the incoming digits are the primary determining factors that control which trunk type is selected.
7-84 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 This trunk type allows flexibility in processing calls as opposed to a fixed static trunk type. Both an AAR/ARS prefix digit (procedure 103) and a DID additional digit (procedure 101) can be administered for ISDN dynamic trunk groups. (This cannot be done for any other type of trunk group.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: 100, WORD: 7-85 2 TRUNK GROUP - MODEM POOLING AND BCC 1. Trunk Group: 2. Bearer Capability Class of Service: MODEM POOLING 3. Originate Mode: 4. Mode: Answer 5. Modem Type: 6. First Choice: 7. Test Type: Connected to CC0 ON-LINE enter command: Figure 7-40. Procedure 100 Word 2: Trunk Group Data Translations (Generic 2) Field 1 Specifies a particular trunk group.
7-86 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 100 Word 3: ISDN Trunk Group Signaling Options The trunk type and signaling type attributes are translated as individual parameters. Figure 7-41, Procedure 100 Word 3: ISDN Trunk Group Signaling Options, depicts this procedure. ENHANCED MODE - PROCEDURE: 100, WORD: 3 TRUNK GROUPS - SIGNALING AND OTHER PARAMETERS Trunk 1. Group: 2. Signaling Type: 3. Glare: 4. Retry: 5. Outgoing Maintenance Busy Out Seizure: 6.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 4 7-87 Retry permits multiple attempts to seize a busy trunk from the specified trunk group. This field is primarily applicable for those trunk groups routed over analog facilities and uses trunk types 41, 42, 43, 46, or 47. Depending on the particular configuration, retry may or may not be applicable for ISDN applications.
7-88 Field 8 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Permits user control of whether the optional ISDN information is transmitted and whether access to other ISDN network features is desired.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: TRUNK GROUP 101, WORD: 7-89 1 CHARACTERISTICS Trunk Group: 1. 2. Balance: 3. Battery Reversal: 4. Incoming Prefix Digit: 5. DCS: 6. Touch-Tone In: 7. Touch-Tone Out: 8. CDR Active: 9. AIOD Billing Number: TIMED RECALL 10. Time: 11. Level: 12. CDR Variable Timer: 13. Pad Group: 14. Tie Toll: 15. APLT Features Allowed: 16.
7-90 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 8 Assigns or not assign the trunk group to SMDR record keeping. Field encodes and their descriptions are: 0 Trunk group usage not applicable for SMDR recording 1 Trunk group usage will be recorded by SMDR 2 Trunk group usage will be recorded, account code is required Fields 9-11 Not used for ISDN applications. Field 12 This field is only applicable when SMDR is being used, and then only to change the default SMDR timer value.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: NETWORK 1. 2. Facility 3. TRUNK Trunk Group: Restriction Level: Network Trunk: 4. GROUP 103, WORD: 7-91 1 TRANSLATION Main/Tandem: 5 . Incoming Tie to AAR/ARS or APLT: 6. Authorization Code Required: 7. Bridge-On Allowed: 8. Trunk 9. 10. 11. Reservation AAR/ARS Data Protection (Permanent): Remote Access Echo Suppressor: 12. AAR Conditional 13. Routing: Second 14.
7-92 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 116 Word 1: DS1/DMI/ISDN-PRI Trunk Assignments For more information, see the chapter in this book entitled Port Types and Installation Compatibilities. Each analog trunk circuit pack provides four circuits that are administered by using procedure 150. Conversely, each DS1 provides 24 circuits (channels) that are administered by using procedure 116.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-93 TABLE 7-10.
7-94 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 10 Assigns the function of the terminating endpoint. Field encodes and their descriptions are: 0 Another customer premises switch 1 A private network connection to a host computer 2 Public network connections Field 11 Translates the D-channel group number. These numbers should be coordinated with field 1 of procedure 262, word 2. Field encodes and their descriptions are: ● Dash (–), for non-NFAS arrangements.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 1 Assigns either an extension number, vector directory number, or trunk group. Field encodes and their descriptions are: ● ● Field 2 7-95 000 through 99999, for extension and directory numbers. Whether the number is three, four, or five digits depends on the numbering plan. 18 through 999, for trunk group numbers. Specifies whether the encode for field 1 is a trunk group or extension/vector directory number.
7-96 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: 012, WORD: 2 NAME DATABASE - ENTRY 1. Segment: CHARACTER ENCODES 2 . Character 1: 3 . Character 2: 4 . Character 3: 5 . Character 4: 6 . Character 7 . Character 5: 8 . Character 9 . Character 7: 6: 8: 10. Character 9: 11. Character 10: Connected enter to CC0 ON-LINE command: Figure 7-46. Procedure 012 Word 2: Name Database (Generic 2) Field 1 Identifies one-of-three 10 character fields.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: NAME DATABASE 012, WORD: 7-97 3 COMPACTION 1. Compact: DISPLAY 2. ONLY Names That Can Yet Be Assigned: 3. Words Available: 4. Words to Be Gained by Compacting: Connected to CC0 ON-LINE enter command: Figure 7-47. Procedure 012 Word 3: Name Database (Generic 2) Field 1 Assigns whether the name database is (1) or is not (0) to be compacted. Fields 2-4 Are display only and serve to show status of the database.
7-98 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: 279, WORD: NETWORK-SPECIFIC 1 FACILITY 1. ISDN Network Service Value: ISDN NETWORK DEFINITION 2. Paramaterized 3. 4. - Binary: Feature - Service: Facility Coding Value: PARAMETERS 5. Parameter 1: 6. Parameter 2: 7. Parameter 3: 8. Parameter 4: 9. Parameter 5: 10. Parameter 11. Parameter Connected enter to 6: 7: CC0 ON-LINE command: Figure 7-48.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 7-99 TABLE 7-11.
7-100 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 309 Word 1: ARS Route Tables This procedure is used for translating/controlling the Automatic Route Selection feature. Figure 749, Procedure 309 Word 1: ARS Route Tables, depicts this procedure. ENHANCED MODE - PROCEDURE: 309, WORD: 1 ARS - ROUTE TABLES 1. ARS Plan: 2. Pattern Number: 3. Preference Number: 4. Trunk Group: 5. Facility Restriction Level: 6. Warning Tone: 7. Distant Area Code (NPA): 8. Send 1 For Toll: 9.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 12 7-101 Specifies the number (designation) of the interexchange carrier (IXC)/ISDN Network Identifier for this trunk group. Permitted field entries may be any number within the range of 0 through 999. NOTE: The IXC/ISDN network identifier enables the switch to provide equal access capability.
7-102 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Fields 1-3 The ISDN-PRI does not place any new or additional considerations on translating these fields. The codes and digits translated are generally dependent on each ARS plan and other switch and network considerations. Field 4 Translates the ISDN trunk type. The network SERVICE application, and any associated application requirements, will determine the appropriate trunk type.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 ENHANCED MODE - PROCEDURE: 321, WORD: 7-103 1 AAR - ROUTE TABLES 1. Pattern Number: 2. Preference Number: 3. 4. Facility 5. Trunk Group: Restriction Level: Warning 6. Tone: Off Net: 7. Number of Digits Deleted: 8. Digit Collect (DC) Signal Ignored: 9. 0xxx Allowed: 10. Connected IXC ISDN Network Identifier: to CC0 ON-LINE enter command: Figure 7-51.
7-104 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 321 Word 5: AAR–ISDN and Other Feature Parameters This procedure is required for translating ISDN trunk groups into the AAR plan. Figure 7-52, Procedure 321 Word 5: AAR–ISDN and Other Feature Parameters, depicts this procedure. ENHANCED MODE - PROCEDURE: 321, WORD: 5 AAR - ISDN AND BEARER CAPABILITY COS 1. Pattern Number: 2. Preference Number: 3. ISDN Dynamic Trunk Type: 4. ISDN Network Service Value: 5.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Field 5 7-105 Assigns a BCCOS to the preference. Permitted numbers include any previously defined BCCOS from procedure 014, word 1. However, BCCOS = 4 is the recommended option. Procedure 107 Word 1: ISDN Trunk Verification by Terminal, Attendant, and ATMS This procedure must be translated to support the trunk verification by voice terminal and trunk verification by attendant features over ISDN-PRI facilities.
7-106 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2 Procedure 108 Word 1: ISDN Trunk Group TTL Number (Digits) This procedure is used to assign the line number that identifies the particular B-channel used for ISDN-PRI testing purposes. This test line number must be assigned for both private and public network configurations. Whether more than one terminating test line number is needed depends on the number of ISDN-PRI links and whether they terminate on more than one switch.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 7-107 SYSTEM 75 (R1V2 AND R1V3) System 75 has the same facility considerations (framing, signaling, line coding format, etc.) as System 85 or Generic 2 and many similar equipment considerations (both require an additional clock circuit pack for synchronization). The main differences are in terms of administration methods (screens for System 75 versus procedures for System 85), and for some fields a difference in terminology.
7-108 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 Location A display-only field specifying the carrier and slot of a DS1. Name The name as shown on the network diagram. Line Compensation Refers to the distance between the switch and the NCTE, CDM, CEM, DSX-1 cross-connect, T1 office repeater, or other equipment. The compensation setting is for the total distance between the switch and the endpoint. TABLE 7-12.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 Signaling Mode 7-109 The default option is common-channel. This option is the same as 24th-channel or AVD for System 85. The alternate choice is robbed-bit. The choice of signaling mode used is dependent on the application. Common-channel signaling multiplexes all signaling information for channels 1-23 into the 24th-channel. This makes available the full 64K-bps bandwidth (of channels 1-23) for voice and/or digital data transmission.
7-110 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 Maintenance Options or Parameters Slip Detection This option enables (y) or disables (n) switching between the primary, secondary, and internal high-accuracy clock. The decision to switch from one source to the other is based on an internal slip count calculation. NOTE: Those DS1/T1 facilities that are used to provide the primary and secondary synchronization reference should be administered for slip detection y.
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 SYNCHRONIZATION SYNCHRONIZATION SOURCE Primary: _ _ _ DS1 Location ___ ___ ___ ___ Slip Name _______________ _______________ _______________ _______________ _ _ _ _ (DS1 PLAN circuit 7-111 Page 1 of 1 pack location) Secondary: ___ CIRCUIT PACKS Location N a m e Slip _ _ _ _______________ _ _ _ _ _______________ _ _ _ _ _______________ _ _ _ _ _______________ _ Figure 7-56.
7-112 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 Trunk Group/Trunk Group Members For System 75 R1V2 and R1V3, there are three applications for a DS1 (tie and DMI); refer to table 7-6, Equipment Parameters and Permitted Translation Encodes. The DS1 tie trunks are defined by using Page 1 of the TRUNK GROUP screen; this is the same as for analog tie trunk groups. Trunk members are added to the GROUP MEMBER ASSIGNMENTS screen (pages 2 through 5).
ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 Trunk Type (in/out) 7-113 Establishes the physical type of incoming and outgoing trunks. For tie trunk applications, field encodes and their descriptions are: ● Auto ● Immed-start ● Wink-start ● Delay-dial Figure 7-58, Trunk Group Screen, Page 2, depicts this procedure.
7-114 ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 The DS1/DMI trunks are defined by using the TRUNK GROUP screen. This screen is somewhat equivalent to System 85 procedure 260, field 14, encode 1. Figure 7-59, Trunk Group Screen, Page 1 (DMI), depicts this procedure.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 7-115 GENERIC 1 Generic 1 has the same DS1 facility considerations (such as framing, signaling, line coding format) as System 75. It also requires the additional clock circuit pack for synchronization. The main significant difference between a System 75 and Generic 1 is support of the TN767 circuit pack for both DS1/DMI and ISDN-PRI.
7-116 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 DS1 Line Location: Compensation: Framing Mode: DMI-BOS? CIRCUIT PACK Page 1 of 1 Name: ____________ Zero Code Suppression: zcs Signaling Mode: common-chan ___ 1 esf y MAINTENANCE Slip Detection? n PARAMETERS Remote Loop-Around Test? n Figure 7-60.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 7-117 Location A display-only field specifying the carrier and slot of the DS1 Interface. Name The name as assigned on the network diagram. Line Compensation Refers to the distance between the switch and the network channel-terminating equipment (NCTE), CDM, CEM, DSX-1 cross-connect, T1 office repeater, or other equipment. The compensation setting is for the total distance between the switch and the endpoint.
7-118 Signaling Mode ADINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 The default option is common-channel. This option is the same as 24th-channel or AVD for System 85. The alternate choices are ISDN-PRI and robbed-bit. If ISDN-PRI is optioned, then the DMI-BOS field disappears and the Connect field appears. The choice of signaling mode used is dependent on the application. Common-channel signaling multiplexes all signaling information for channels 1-23 into the 24th-channel.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Interface 7-119 This field is not available unless the Connect field is translated pbx. Field encodes and their descriptions are: ● user (default option) ● network NOTE: For ISDN-PRI private network connections, additional care must be exercised in defining user and network sides. Specifically, only one end must be administered user side, while the alternate must be defined as network side.
7-120 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 SYNCHRONIZATION SYNCHRONIZATION SOURCE Primary: _ _ _ DS1 Location ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ Name _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ (DS1 PLAN circuit Page 1 of 1 pack location) Secondary: _ _ _ CIRCUIT PACKS Slip Location _ _ _ _ _ _ _ _ _ _ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ Name ________
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 7-121 Trunk Group/Trunk Group Members — DS1 Trunk Applications For DS1/DMI applications the TN722_ circuit pack emulates three categories of trunk types, while the TN767 circuit pack emulates three additional trunk types; refer to table 6-1, Supported Digital Facilities. DS1/DMI trunking applications are defined by using page 1 and page 2 of the TRUNK GROUP screen; this is the same as for analog trunk groups.
7-122 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 BCC This field is only displayed when ISDN-PRI is enabled on the SYSTEM PARAMETERS CUSTOMER-OPTIONS screen and when the Communications Type field is administered avd or data. Trunk Type (in/out) Establishes the physical type of incoming and outgoing trunks.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 TRUNK ACA Assignment? n Holding Time(secs.): 10 MIS Measured? n Internal Alert? n Used for DCS? n Maintenance Tests? y Suppress # Outpulsing? n GROUP Page 2 of 9 Long Holding Time(hours): 1 Short Holding Threshold: 15 Short PBX ID: 1 Data Restriction? n Figure 7-64.
7-124 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Port This field associates each trunk group member to a particular network (1 or 2), carrier (A-E), slot (01-20), and circuit (01 -24). To keep things simple, try to match trunk group member and DS1 channel assignments (for example, trunk group member 1 on channel 1 Name Typically, this entry is a 7-digit telephone number.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 DATA MODULE Data Extension: ______ Type: procr-infc Physical Channel: _ _ _ Name: _______________ 7-125 Page 1 of 1 COS: 1 COR: 1 Maintenance ABBREVIATED List1: HOT LINE Extension: _____ DIALING ____________ DESTINATION Abbreviated Dialing Dial Code (from above list): _ _ ASSIGNED MEMBERS ( Stations with a data extension button for this data module ) Ext 1: 2: Name Ext Name 3: 4: Figure 7-66.
7-126 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 PROCESSOR Proc Chan Appl.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 INTERFACE Link 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: Enable y n n n n n n n n n n n n n n Est Conn y _ _ _ _ _ _ _ _ _ _ _ _ _ _ LINKS 7-127 Page 1 of 1 PI Ext Prot Destination Brd Digits _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ ISDN _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ ____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _
7-128 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Trunking Considerations — ISDN-PRI Applications It is necessary to determine those types of ISDN-PRI network services desired before attempting to build the ISDN-PRI trunk groups. Some of the more significant considerations should include the following: NOTE: An ISDN-PRI trunk group is created by translating the Group Type field as isdn-pri. 1 . Will the switch provide ISDN-PRI private network access or ISDN-PRI public network access? 2 .
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 7-129 accommodated with a single trunk group, and that trunk group is provided with allocation and scheduling controls, then significant trunking efficiencies are realized by distributing the traffic over the total number of available trunks. CBC Usage Allocation Plans control the trunk groups so that dedicating a trunk group to an ISDN application is not needed.
7-130 Facility Coding ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 The ISDN-PRI specification further requires that each service or feature be identified as a: ● Parameterized Service ● Parameterized Feature ● Binary Service ● Binary Feature The facility coding values, listed on the identification. NETWORK-FACILITIES screen, provide this Trunk Group — ISDN-PRI Trunk Applications ISDN-PRI trunk groups are defined by using the first page of the TRUNK GROUP screen.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 7-131 Only the new ISDN-PRI service application fields or those fields that require special or additional considerations are mentioned here. Group Type For ISDN-PRI service applications this field should be translated isdn-pri. NOTE: The SYSTEM-PARAMETERS CUSTOMER-OPTION screen must have ISDN-PRI service enabled before this trunk group type can be translated. Dial Access Normally, this field is defined as y.
7-132 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Send Display/TCM in Codeset 6/7 This field maps the display information (codepoint 8) and the TCM information (codepoint 40) to codeset 6 or codeset 7, depending on whether a 6 or a 7 is translated. The distant switch will determine which should be translated. Specifically, if the distant switch is a 4ESS with 4e11 or 4e12 software, or a System 85 R2V4, then this field should be translated with a 7.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Page 2 of 11 TRUNK FEATURES ACA Assignment? Short Holding Time (secs.
7-134 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Send Name This field determines whether the calling (originating) party’s administered name is sent to the network for outgoing calls and whether the connected (answering) party’s name is sent to the network for incoming calls. Field encodes and their descriptions are: y Enable this capability.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Called Number 7-135 Generally, this field only specifies some of the leading digits that are contained in the called-party number IE. The digits received must match, on a digit-per-digit basis, what is administered in this field. Field encodes and their descriptions are: ● A series of numbers, which may consist of from 1 to 16 digits, corresponding to the required leading digits.
7-136 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Insert Per Call SID/ANI Night Serv The digits inserted before the Called Party Number IE. This specifies the digits prepended to the front of the remaining digits after any (optional) digit deletion has been performed. The resultant number formed from digit deletion/insertion is used to route the call, providing that night service is not in effect.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 ● 7-137 Called Number field is specified with M leading digits, where M is a number of digits less than N (for example, the three digits 855). NOTE: The screen that follows these case examples depicts a line entry (Service/Feature, Called Len, Called Number,...) for each case. The first (top) entry is for case 1, the second entry from the top is for case 2,...the last entry shown is for case 7.
7-138 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Case 4 ● Service/Feature field is specified (for example, mega800). ● Called Len field is not specified (that is, left blank). ● Called Number field is not specified (that is, left blank). Application for Case 4 being selected Assume the switch receives a MEGACOM 800 call that has a called-party number IE with the digits 75442. Based on the Service/Feature field alone, this call will match Case 1, 2, 3, and 4.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 ● Called Len field is not specified (that is, left blank). ● Called Number field is not specified (that is, left blank). 7-139 NOTE: Case 8 is the least restrictive (nonrestrictive) and will match all calls not handled by any other case. Applications for Cases 5-8 Cases 5-8 are similar to Cases 1 through 4 respectively. The only difference is that the Service/Feature field is changed to other.
7-140 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 N O T E : Although each usage allocation plan may contain up to 10 entries, a given Service/Feature may only be listed once per plan. Many other scenarios may be developed for applying a plan. Various reasons may be used. Figure 7-73, Trunk Group Screen, Page 3 (ISDN-PRI), depicts this procedure.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Min# Chan 7-141 This field reserves a specified number of trunk group members that are to always be available to the associated Service/Feature. Permitted numbers are any number within the range of 0 to 99. NOTE: For each allocation plan, the sum of the Min# Chan columns must be less than the total number of members for the trunk group.
7-142 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 CBC TRUNK GROUP USAGE ALLOCATION PLAN ASSIGNMENT SCHEDULE Usage Method: Fixed? y Scheduled? n Page 4 of 11 Allocation Plan Number: 1 Usage Allocation Plan Activation Schedule: Plan # Act Time Sun Mon Tue Wed Thu Fri Sat __:__ __:__ __:__ __:__ __:__ __:__ __:__ _ _ _ _ _ _ _ Act Time __:__ __:__ __:__ __:__ __:__ __:__ __:__ Plan # _ _ _ _ _ _ _ Act Time __:__ __:__ __:__ __:__ __:__ __:__ __:__ Plan # _ _ _ _ _ _ _ Act Time __:__ __:__
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Act Time 7-143 Specifies the time that the associated usage allocation plan will become effective. Time must be specified in 24-hr format. Permitted entries are 00:00 through 23:59. NOTE: Each day of the week must have at least one entry, but may have as many as six transition times. A transition time is defined as the time when another plan becomes effective. A new or different plan will not effect existing calls, but will effect new call attempts.
7-144 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Port This field associates each trunk group member to a particular network (1 or 2), carrier (A-E), slot (01-20), and circuit (01-24). To keep things simple, try to match trunk group member assignments with B-channel assignments (for example, trunk group member 1 on channel 1). Name Typically, this entry is a 7-digit telephone number.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 7-145 Permitted entries are single digit numbers less than or equal to the number administered in the Page Length field of the DIAL PLAN RECORD screen. For example, if the Page Length field is translated five (meaning a five digit numbering plan), then this field may contain the number 1, 2, 3, 4, or 5. If the Page Length field is translated four (meaning a four digit numbering plan), then this field may contain the number 1, 2, 3, or 4.
7-146 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Page 1 of 5 SID PREFIX TABLE Ext Len Ext Code SID Prefix Ext Len Ext Code SID Prefix Ext Len Ext Code SID Prefix 5 5 _ _ _ _ _ _ _ _ _ _ _ _ _ _ 31 41 _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ 2012353000 20123 __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 ROUTING 7-147 Page 1 of 1 PATTERNS Pattern Number: __ Pattern Assignments (Enter Up To 6) 1. 2. 3. 4. 5. 6. 1. 2. 3. 4. 5. 6. 0 _ _ _ _ _ _ Grp. No. FRL NPA ___ ___ ___ ___ ___ ___ _ _ _ _ _ _ ___ ___ ___ ___ ___ ___ BCC Value 1 2 3 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Prefix Mark _ _ _ _ _ _ Toll List _ _ _ _ _ _ No.
7-148 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 Prefix Mark This field is only used for public network (ARS) applications. The Prefix Mark relates to the ARS Prefix 1 Required? field on the DIAL PLAN RECORD screen. If the ARS Prefix 1 Required? field is translated y, then (for certain type of calls) it may be necessary to transmit the one along with the dialed digits. The Prefix Mark field permits four different entries (numbers) for administering this capability.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 BCC Values 7-149 Each routing pattern preference (1 through 6) has an associated BCC Value field. Therefore, when a preference is translated, the associated BCC must also be translated. A trunk group preference must be valid for one or more BCC values. Permitted entries are y to enable the value and n to disable the value.
7-150 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 HUNT Group Number: Group Name: Security Code: Queue? ISDN Caller Disp: Page 1 of 6 GROUP Group Extension: __ Coverage Path: _______________ Message Center: ____ Night Service Destination: n ________ ____ _ _ _ none ____ Group Type: used COR: 1 ACD? n Figure 7-79. Hunt Group Screen Only the new ISDN-PRI service application fields or those fields that require special or additional considerations are mentioned here.
ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1 TERMINATING Group Number: Group Name: Security Code: ISDN Caller Display: GROUP MEMBER Ext 1: _ _ _ _ 2: _ _ _ _ __ _______________ ______ ______ EXTENSION Page 1 of 1 GROUP Group Extension: _ _ _ _ Coverage Path: ___ COR: 1 _ ASSIGNMENTS Name Ext 3: ____ 4: ____ Name Figure 7-80. Terminating Extension Group Screen ISDN Caller Display Specifies whether the hunt group name or the member name will be sent to the originating extension.
7-152 ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1
8. MAINTENANCE AND ALARMS This chapter describes general maintenance items. For solutions to other problems not covered in this chapter or for additional information about a specific problem, refer to D E F I N I T Y ® Communications System Generic 2 and System 85 Maintenance Procedures (555-104-117) and DEFINITY Communications System Generic 2 and System 85 Repair Strategy (555-104-118).
8-2 MAINTENANCE AND ALARMS maintenance activities. Digital circuit packs are able to detect and report errors occurring on both the circuit pack itself and on the digital transmission facility. The circuit packs are also able to restore service automatically when and if any detected faults should clear. For ISDN-PRI, layer-3 protocol defines a set of maintenance related service messages. The service messages may be transmitted from the near end ISDN-PRI to the far end ISDN-PRI and vice versa.
MAINTENANCE AND ALARMS 8-3 When procedure 620 is used the following points should be understood: ● Procedure 620 consists of five separate tests, identified as tests 1 through 5. ● Tests 1, 2, and 3 may be done without affecting service. Tests 4 and 5 affect service. ● Test 1 checks all DS1s or DMIs for the presence of any transmission facility faults; if found, they are stored away until the identified interface has been checked.
8-4 MAINTENANCE AND ALARMS ● ● Tests 4 and 5 will light the red LED on the circuit pack when facility errors cause procedure 620 to fail. Depending on the type of errors, other LEDs may be in their alarm state. However, the circuit pack should not necessarily be replaced, because pulling the circuit pack may cause other facility errors to be introduced. Excessive circuit pack removals and insertions reduce the life of the carrier.
MAINTENANCE AND ALARMS 8-5 3 Demand maintenance busy (busy-out from a procedure) 4 Auto maintenance busy (busy-out from call processing) 5 Far-end maintenance busy 6 Trunk in transitory state (T-limbo) Additional trunk status is available in field 10; for example, if test status = 5, then protocol negotiation is taking place.
8-6 MAINTENANCE AND ALARMS GENERIC 1 MAINTENANCE CAPABILITIES AND CONCERNS Generic 1 provides the same functional maintenance capabilities (such as error detection, error logging, error testing, and alarm reporting) as Generic 2. However, because of hardware and software differences and because Generic 1 uses the Manager rather than the Manager terminal, there are several user-perceived differences. For example, Generic 1 maintenance uses the concept known as maintenance objects (MOs).
MAINTENANCE AND ALARMS 8-7 Summary of Generic 1 Maintenance Capabilities Since Generic 1 implements the same DS1, DMI, and ISDN-PRI protocols as Generic 2, both switches provide the same maintenance capabilities. Since Generic 1 DS1s provide conprehensive detection capabilities, the switch usually detects errors caused by network facilities even though an alarm will not trip. ALARMS Unlike analog port circuit packs, a DS1 has two categories of alarm signals: circuit-pack-level and facility.
8-8 MAINTENANCE AND ALARMS Facility Alarms There are several types of facility alarms that may arise. These are briefly described next. Excessive Slips Data received from a DS1 facility is stored (clocked) into buffers on the circuit pack signal derived from the received signal. Data is read from the same buffers using a from the master clock. If at any time these two clocks are not phase-locked, data will the buffers at a rate different from the rate read from the buffers.
MAINTENANCE AND ALARMS 8-9 One frequent cause of this alarm is an incorrect setting of the framing option at one end of the transmission facility (for example, the near end set for the D4 and the far end set for ESF, or viceversa). This scenario will cause the LFA at both ends of the transmission link. Another possible cause is an intermittent or broken cable, or a rain-attenuated signal (with microwave transmission facilities).
8-10 MAINTENANCE AND ALARMS Blue Alarm The blue alarm shows that maintenance activities are in progress and that the out-of-service condition exists for that DS1 facility. This alarm is recognized as a continuous stream of 1s with no provisions for framing. Depending on the particular NCTE being used, this alarm condition may be treated differently. This condition may result in the NCTE automatically looping the signal back to the switch.
A. ADMINISTRATION REQUIREMENTS The following screens detail System 75 (R1V2 and R1V3) special-access administration requirements for implementing a Software Defined Network (SDN), MEGACOM ® service, MEGACOM 800 service, and MEGACOM 800 dialed-number identification service (DNIS) connections to a 4ESS configured with 4e9 generic software. All screens are shown with their required or suggested field entries.
A-2 ADMINISTRATION REQUIREMENTS Line Compensation Relates to the distance between the switch and the network channel-terminating equipment (NCTE), channel-division multiplexer (CDM), channel-expansion multiplexer (CEM), or a digital signal level 1 (DS1) cross connect field (called a DSX-1). Refer to System 75 R1V2 under ADMINISTRATION ISSUES for details on selecting the appropriate value.
ADMINISTRATION REQUIREMENTS TRUNK Group Number: Group Name: Direction: Dial Access? Queue Length: Comm Type: GROUP A-3 Page 1 of 5 SMDR Reports? y Group Type: tie (number assigned) MEGACOM 800 TAC: 189 COR: 1 Outgoing Display? y Data Restriction? n 1 -way in Busy Threshold: 60 Night Service: ____ y 0 Internal Alert? n Incoming Destination: ____ voice TRUNK PARAMETERS Trunk Type(in/out): wink/auto Outgoing Dial Type: _______ Incoming Rotary Timeout(sec.
A-4 ADMINISTRATION REQUIREMENTS TRUNK GROUP Group Number: Group Name: Direction: Dial Access? Queue Length: Comm Type: TRUNK Page 1 of 5 Group Type: tie SMDR Reports? y (number assigned) TAC: 189 COR: 1 MEGACOM 800 DNIS Data Restriction? n Outgoing Display? y 1-way in Busy Threshold: 60 Night Service: ____ y Internal Alert? n Incoming Destination: ____ 0 voice PARAMETERS Trunk Type(in/out): wink/auto Outgoing Dial Type: _______ Incoming Rotary Timeout(sec): 5 Incoming Dial Type: tone Disconnect Timin
ADMINISTRATION REQUIREMENTS TRUNK Group Number: Group Name: Direction: Dial Access? Queue Length: Comm Type: TRUNK GROUP Page 1 of 5 Group (number assigned) COR: 1 SDN two-way Outgoing Display? Busy Threshold: y Internal Alert? n 0 voice Type: tie SMDR Reports? y TAC: 189 y Data Restriction? n 60 Night Service: ____ Incoming Destination: ____ PARAMETERS 5 Trunk Type(in/out): wink/wink Incoming Rotary Timeout(sec): Outgoing Dial Type: tone Incoming Dial Type: tone Disconnect Timing(msec): 500 Digits:
A-6 ADMINISTRATION REQUIREMENTS Primary System 75 must obtain synchronization timing from a 4ESS. Typically, the carrier slot location for the DS1 connecting to a 4ESS is used as the primary source. The switch must also be equipped with a TN741. Secondary If multiple DS1s are present in a System 75 and are connected to this or other 4ESSs, then it may be desirable to enter their slot locations as a secondary synchronization source.
B. SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS Based on field experience, most problems can be categorized into three general areas: ● Translations-based problems ● Synchronization-related problems ● Physical interfacing connection problems This appendix is organized so that there are additional subject subheadings within each category.
B-2 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS ● Versatility ● Complexity of installation ● Administration ● Operation ● Type of alarms When a DS1/DMI facility fails to operate (because of a line failure), the first choice in diagnosing the problem is to check the translations. Mistakes in translating procedure 260 are identified by comparing the translations and equipment options from one DS1/DMI and all intermediate equipment to the other DS1.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS ● OPTIONS: D4 FRAMING ● PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ● ZCS ● CHANGED FROM FIGURE B-1 B-3 OPTIONS: D4 FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS ● ● ● ● DS1 OR DMI INTERFACE TRANSMISSION FACILITY (2-WAY COMMUNICATION) DS1 OR DMI INTERFACE CALL PROCESSING CAN NOW OCCUR ASSUMING CORRECT TRUNK GROUP TRANSLATIONS AND PROPER ASSIGNMENT IN PROCEDURE 116. Figure B-2.
B-4 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS CHANNEL 1 CHANNEL 2 LOCATION A LOCATION B DS1 INTERFACE DS1 INTERFACE 5/0 6/0 TYPE 36 ....................... TRANSMISSION CHANNEL 13 0/0 CHANNEL 14 1/0 TYPE 75 TYPE 75 5/0 6/0 CHANNEL 1 CHANNEL 2 TYPE 36 0/0 CHANNEL 13 1/0 CHANNEL 14 FACILITY ...................... Figure B-3. Incorrect Assignment of Trunks CHANNEL 1 CHANNEL 2 LOCATION A LOCATION B DS1 INTERFACE DS1 INTERFACE 5/0 6/0 TYPE 75 ......................
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-5 the REC or NEC to ensure compatibility between these devices and the associated communications systems. CDMs The CDM is used to drop or insert one or more DS1/DMI channels from the transmission facility. These channels may be used for external data or voice applications, depending on the channel units that are used in the CDM. Channel 1, for example, can be selected for drop or insert by the CDM.
B-6 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS OTHER ENDPOINT OPTIONS: SYSTEM 75 OR SYSTEM 85 OPTIONS: ● ● ● ● D4 OR ESF FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS DS1 OR DMI INTERFACE A DS1 OR DMI INTERFACE B ● ● ● TRANSMISSION FACILITY 24 TRUNKS 24 TRUNKS CEM CEM ● D4 OR ESF FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS 24 TRUNKS INTERFACE A 24 TRUNKS DS1 OR DMI INTERFACE B DS1 OR DMI CEM OPTIONS: (BOTH ENDS) ● BUNDLING SIGNALING OR ● VARIABLE BIT-ROBBED SI
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS OTHER ENDPOINT INTERFACE A OPTIONS: SYSTEM 75 OR SYSTEM 85 INTERFACE A OPTIONS: ● ● ● ● D4 OR ESF FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS DS1 OR DMI INTERFACE A 12 AVD TRUNKS DS1 OR DMI INTERFACE B 21 VOICEGRADE TRUNKS ● ● ● TRANSMISSION FACILITY CEM SYSTEM 75 OR SYSTEM 85 INTERFACE B OPTIONS: ● ● ● ● B-7 ● D4 OR ESF FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS 12 AVD TRUNKS DS1 OR DMI INTERFACE A 21 VOICEGRADE TRUNKS DS
B-8 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS ---- D4-CHANNEL BANK OPTIONS: D4 FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS SYSTEM 75/SYSTEM 85 OPTIONS: D4 FRAMING PER-CHANNEL SIGNALING ROBBED-BIT SIGNALING ZCS ● ● ● ● ● ● ● ● DS1 OR DMI INTERFACE TRANSMISSION FACILITY D4 CHANNEL BANK Figure B-8. System 75/System 85 to a D4-Channel Bank Channels 1 through 24 may be used for almost any combination of trunks.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-9 Loss of or No Synchronization Without synchronization, a digital interface runs on its own internal clock. If both ends of a DS1/DMI facility (both DS1s) run on their internal clock, timing differences (slips) occur. Digital transmission, either analog data (modem) or digital data, is disrupted at very low slip rates.
B-l0 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS DS1 DS1 OR DMI OR DMI PRIMARY REFERENCE INTERFACE LOCATION A PRIMARY REFERENCE INTERFACE LOCATION B Figure B-10. Leavenworth Loop on the Primary Reference DS1 OR DMI INTERFACE LOCATION A SECONDARY REFERENCE SECONDARY REFERENCE DS1 OR DMI INTERFACE LOCATION B PRIMARY REFERENCE DS1 OR DMI INTERFACE LOCATION C Figure B-11.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-11 common equipment shelf of the D4. External timing may only be optioned from the OIU-2. Loop timing should be selected (digital switch as the master reference) in every instance but one: when a lower stratum clock is available to time the D4-channel bank externally. Figures B-12, N O Synchronization Reference Assigned at Location A, and B-13, No, Primary, or Secondary Sync Reference Assigned at Location A, show these arrangements.
B-12 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS Digital CO Synchronization Problems Synchronization of DS1 links into a digital CO presents far fewer problems. When a DS1/DMI facility is connected directly into a digital interface circuit pack in the CO, then the only questions are: 1. Is the CO reference (stratum clock) a stratum 3 or better? 2. Is that reference compatible with any other reference available to the System 75 or System 85? Figure B-14.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-13 for System 85s that are configured with the ANN11C version 8 or later circuit pack. Figure B-15, Synchronization from DACS Node, shows a configuration that obtains synchronization from a DACS. DS1 OR DMI INTERFACE PRIMARY REFERENCE DACS (STRATUM 3) OR BETTER LOCATION A DS1 OR DMI INTERFACE PRIMARY REFERENCE LOCATION B PRIMARY REFERENCE OTHERS Figure B-15.
B-14 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS To fix these problems and establish compatibility across several products, new cable groups were developed. These cable groups specify a standard set of pin assignments for four different connector types.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-15 TABLE B-2. System 75 Versus System 85 Cable Comparisons CABLE/CONNECTORS (NOTE 1) (PDS COMPATIBLE) (INITIAL OR OLD) SYSTEM 85 (NOTE 2) SYSTEM 85 (NOTE 2) INTRACABINET GR 335-337 GR 367-369 (NOTE 3) 50- TO 15-PIN GR 117 GR 180 OR GR 380 50 TO WIRE-LUGS GR 357 GR 370 OR GR 380 50- TO 50-PIN GR 135 GR 181 OR GR 380 . . . . . . . . . . . . . . . . NOTES: 1. These are special purpose shielded cables.
B-16 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS Table B-3, 15-Pin Connector Arrangement (System 75/85 Perspective), shows the 15-pin connector arrangement. TABLE B-3. 15-Pin Connector Arrangement (System 75/85 Perspective) DS1 OR DMI PINOUT FOR 15-PIN CONNECTOR PIN NUMBERS COLOR . . 1 9 . . BR W/BR . . . 3 11 . . W/GR GR . . . 13 5/6 . . SL-? W/SL .
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-17 TABLE B-4. 8-Position Modular Jack Pin Assignments (System 75 and System 85 Perspective) DS1 OR DMI PINOUT FOR 8-PIN MODULAR JACK (NOTE 1) FUNCTION PIN NUMBERS 1 2 3 6 4 5 RECEIVE LOOPBACK (NOTE 2) TRANSMIT OTHERS NOT USED NOTES: 1. The modular jack may be either the RJ48C or the RJ48X connector. 2. Signal leads 3 and 6 are unused or used for loop feedback. Specific Cabling Options System 75 only uses the new or PDS compatible pinouts.
B-18 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS System 85 DS1/DMI to System 85 DS1/DMI — Colocated Arrangement How this connection is made depends on the vintage or suffix of each DS1. The ANN11B or ANN11C line drivers do not comply with FCC emission standards. Therefore, if the ANN11B or ANN11C are used at one or both ends, this connection may only be implemented by using type DCC-5/24-TSA cable. Type DCC-5/24-TSA cable is required when the ANN11B/C is used.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS B-19 Permitted Cabling Combinations Using PDS Using cable GR-380: NOTE: When using PDS wiring, the easiest approach is to connect the port cabinets at each end to a cross-connect field (XCF) using GR-380 cables. With this arrangement, it is not necessary to determine the group number of the intracabinet cable.
B-20 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS System 85 DS1/DMI to System 75 DS1/DMI — Colocated Arrangement Permitted Cabling Combinations Using cable GR-380: ANN11C/D/E ↔ [335-337] ↔ GR-380 ↔ System 75 ANN11C/D/E ↔ [367-369] ↔ GR-380 ↔ System 75 Using old cable groups: Connections using cable group 357 will not work.
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS System 85 DMI to Host Computer Permitted Cabling Combinations Using cable GR-380: ANN11D/E ↔ [335-337] ↔GR-380 ↔ DMI-Host ANN11D/E ↔ [367-369] ↔GR-380 ↔ DMI-Host Using old cable groups: Connections using cable group 357 will not work.
B-22 SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS System 85 DS1/DMI Direct to a NCTE Permitted Cabling Combinations Using Cable GR-380: ANN11C/D/E ↔ [335-337] ↔ GR-380 ↔NCTE ANN11C/D/E ↔ [367-369] ↔ GR-380 ↔NCTE Using old cable groups: ANN11C/D/E ↔ [335-337]↔ 117↔NCTE Using new cable groups: ANN11C/D/E ↔[367-369] ↔ 180↔ NCTE System 85 DS1/DMI-BOS to a CEM or CDM Permitted Cabling Combinations Using cable GR-380: ANN11C/D/E ↔ [335-337] ↔ GR-380 ↔CEM/CDM ANN11C/D/E ↔ [367-369] ↔ GR-380 ↔CEM/CDM Using old
C. ADMINISTRATION PROCEDURE SUMMARY This appendix examines administrative procedures in DEFINITY ® Generic 2 that relate to ISDNPRI. It describes how pertinent administrative fields relate to ISDN-PRI level-3 message contents and general feature operation. This appendix is organized in ascending administrative-procedure number. Differentiations are made between System 85 R2V4 and Generic 2 where appropriate.
C-2 ADMINISTRATIVE PROCEDURE SUMMARY Mode 3 Opcode: 4 (assuming no codeset mapping) Information transfer capability: either unrestricted digital information or restricted digital information depending on the translation specified for the bearer capability COS in field 15 of procedure 014, word 1.
ADMINISTRATIVE X.25 PROCEDURE SUMMARY C-3 Opcode: 4 (assuming no codeset mapping) Information transfer capability: unrestricted digital information Coding standard: CCITT Information transfer rate: coded to a 0 Transfer mode: packet mode Layer and protocol identification: recommendation X.25 link level (LAPD) (layer 2) Layer and protocol identification: recommendation X.
C-4 1 ADMINISTRATIVE PROCEDURE SUMMARY Use an ISDN-PRI trunk exclusively. When routed to a specific pattern, the first available ISDN trunk found in the highest preference is used. Non-ISDN trunk group preferences are skipped in the routing algorithm. If an ISDN-PRI trunk group is not translated in this pattern, the calling party hears intercept tone. This encode can be used to ensure that an ISDN digital trunk is used for a certain set of users (such as high-speed data endpoints).
ADMINISTRATIVE PROCEDURE SUMMARY Mode 2 Opcode: 4 Information transfer capability: restricted digital information Coding standard: CCITT Information transfer rate: 64K-bps Transfer mode: circuit mode Mode 3 Opcode: 4 Information transfer capability: restricted digital information Coding standard: CCITT Information transfer rate: 64K-bps Transfer mode: circuit mode Mode 0 Opcode: 4 Information transfer capability: restricted digital information Coding standard: CCITT Information transfer rate: 64K-bp
C-6 ADMINSTRATIVE PROCEDURE SUMMARY For an ISDN trunk group, a dynamic trunk type (120) can be assigned to the group. This trunk type allows the group to process calls with a different trunk type on a call-by-call (CBC) basis. For example, one incoming call over the group may expect station number digits (such as a MEGACOM call), while the next call over the group may expect a network number (such as a Software Defined Network call, also called a SDN call).
ADMINISTRATIVE PROCEDURE SUMMARY C-7 PROCEDURE 100 WORD 3 (System 85 R2V4 & Generic 2) Field 2 Used to assign a trunk group as ISDN-PRI that has ISDN-PRI signaling (type 20). This causes ISDN-PRI message-oriented signaling (MOS) to occur for the trunk group. Field 3 Not applicable for ISDN-PRI trunk groups. ISDN-PRI specifications explain the procedures to be used when glare is encountered. These specifications are implemented in the ISDN-PRI feature code.
C-8 ADMINISTRATIVE PROCEDURE SUMMARY Field 15 BC (System 85 R2V4 Only). For ISDN-PRI this field comes into play on interworked tandem calls through the switch where the calling trunk is non-ISDN-PRI and the called trunk is ISDN-PRI. Here, the BC of the non-ISDN trunk is used to define a BC that is used in the outgoing setup message over the ISDN-PRI trunk. See the B C section for encodings of the BC IE. The BC is also used to determine which ARS/AAR route to select.
ADMINISTRATIVE PROCEDURE SUMMARY C-9 PROCEDURE 108 WORD 1 (System 85 R2V4 & Generic 2) This procedure is used to assign the terminating test-line telephone digits to an ISDN-PRI trunk group. These are the address digits used to build the called party number IE in the setup message when making a demand test call via procedure 648 test 3. If digits are not translated, address digits do not appear in the IE.
C-10 ADMINISTRATIVE PROCEDURE SUMMARY Field 5 of this word specifies an interface type of network or user. For an ISDN-PRI point-to-point link to function, one end must be translated as network and the other end as user. This field also determines how glare is handled on this board.
ADMINISTRATIVE PROCEDURE SUMMARY C-11 (timer value) = (N200 + 1) * T200 The default value of these four timers is 4 seconds [(3 + 1) * 1]. T321 is defined as T203 + 10 seconds. As T203 defaults to 30 seconds, T321 is defined as a 40 second timer. Field 13 of this word applies only to Generic 2. If the physical location is part of an NFAS arrangement, field 13 identifies this interface from other interfaces in the arrangement. This information is also used in the coding of the channel identification IE.
C-12 ADMINISTRATIVE PROCEDURE SUMMARY TABLE C-2. System 85 R2V4 to Generic 2 IE Opcode Translations IE Opcode Value R2V4 G2 Information Element (IE) Name 1 2 4 Link layer parameters Packet layer parameters Logical link identification 64 62 26 The next two user-to-user IEs kept the same opcode values when moved from codeset 7 to codeset 6: TABLE C-3.
ADMINISTRATIVE PROCEDURE SUMMARY C-13 PROCEDURE 309 WORD 5 (System 85 R2V4 & Generic 2) This word deals with the sending of a particular NSF IE in the setup message and with rules of route selection. Field 4, ISDN Trunk Type This field can only contain a value when the trunk group associated with the plan, pattern, or preference has a type of ISDN dynamic. Here, it must have a value entered or the outgoing call over this preference will fail.
C-14 ADMINISTRATIVE PROCEDURE SUMMARY NSF IE (System 85 R2V4) For System 85 R2V4, the following values can be entered into field 5: 33 through 288 (OUTWATS Band NSFs) These values specify the plan, pattern, or preference is requesting service for OUTWATS bands 0-255 respectively. For example, 33 specifies OUTWATS band 0 and 34 specifies OUTWATS band 1. Opcode: 2 The following three items are sent only if field 12 of procedure 309, word 1, is nonzero.
ADMINISTRATIVE PROCEDURE SUMMARY 356 (WATS NSF) C-15 Opcode: 2 The following three items are sent only if field 12 of procedure 309, word 1, is nonzero.
C-16 ADMINISTRATIVE PROCEDURE SUMMARY Rules for requesting ACCUNET services from different generics of 4ESS are the same as those for System 85 R2V4. That is, when dealing with 4E13 or later, set up a definition of a binary service with a value of 6. This definition is used in field 6 of procedure 309, word 5, that sends an NSF (this is the parallel to the above example for System 85 R2V4 where a value of 357 was used).
ADMINISTRATIVE PROCEDURE SUMMARY Field 6 (Generic 2) C-17 Field 16 of procedure 014, word 1, defines the BC for the calling party’s COS. Fields 4 through 13 of procedure 014, word 1, define the bearer capability COS of the preference. Field 6 of procedure 309, word 5, defines how to handle calling parties. If a calling party with a particular BC is to be blocked from using this preference, the next preference is checked. If all preferences block this particular BC, the call is denied.
C-18 ADMINISTRATIVE PROCEDURE SUMMARY In addition, a thousands digit can be assigned in field 4. This digit must be assigned in 3-digit switches for the calling party number and connected number to make sense. If assigned in a 4 or 5digit switch, it is used for the thousands digit in the address digit stream regardless of what the thousands digit is for the extension or LDN.
ADMINISTRATIVE PROCEDURE SUMMARY The following are ISDN-related tasks and their task numbers for System 85 R2V4: Task 35 ISDN queue server task Task 47 ISDN level-3 timing task Task 55 ISDN JUMBO I/O task Task 61 ISDN incoming message-verification task The following are ISDN-related tasks and their task numbers for Generic 2: Task 35 ISDN queue server task Task 47 ISDN level-3 timing task Task 55 ISDN JUMBO I/O task Task 61 ISDN incoming message-verification task Task 62 ISDN applications service element q
C-20 ADMINISTRATIVE PROCEDURE SUMMARY
D. TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES This appendix contains three tables that define trunk type to signaling type compatibility for System 85 R2V1, R2V2, R2V3, R2V4, and Generic 2. Table D-1, Trunk/Signaling Cross-references, provides, on a trunk type basis, the default signaling type, the feature and direction compatibility, and the valid signaling types.
D-2 TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES Direction Defines if the trunk type is capable of both: ● Incoming and outgoing calls — 2-way ● Incoming calls only — 1-way in ● Outgoing calls only — 1-way out Default Signaling The default SIG_TYPE value for the trunk type EQU COMPOOL EQU for default signaling type A1 - A4 Values in these columns (if any) are the COMPOOL EQUs for other valid signaling types for this trunk type; at present, no trunk has more than five total valid signaling
TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES Trunk Type EQU Feature Direction Default Signaling EQU A1 A2 A3 A4 D-3 Description 2 way with party test (2) co_2wp (20) CO 2-way ground_start_w_pt fx1wi 21 FX 1-way in ground_start 1 28 29 19 20 fxlwo 22 FX ground_start 1 28 29 19 20 fxlwop (23) FX 1-way out 1-way out fx_2w 24 FX 2-way ground_start FX 1 way incoming attendant completing (automatic in) ground_start_w_pt 1 way outgoing dod 1 way out dod with
D-4 TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES Trunk Type EQU Feature Direction Default Signaling EQU A1 A2 A3 A4 Description tt-sender 55 NA NA no_signal_required 0 touch tone sender caserv 56 NA NA no_signal_required 0 centralized attendant service interface r1s_link 57 CAS 1-way out em_rls_link_trunk_out 13 release link trunk for cas anickt 58 NA NA ani_signaling 6 ani interface s_ms_int 59 NA NA no_signal_required 0 sta_msg register interface unused
TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES A1 A2 A3 D-5 Trunk Type EQU Default Signaling EQU dtlpdm 102 NA 2-way s_channel_signaling 18 pooled data module trunk for modem pool dtlha2w 103 NA 2-way s_channel_signaling 18 host access trunk, 2-way, pim dtlhaop 104 NA 2-way s_channel_signaling 18 host access trunk off-premises, dtim dtlap32 105 NA 2-way s_channel_signaling 18 host access trunk, ap32 106 NA 2-way s_channel_signaling 18 host access trunk, eia dtl
D-6 TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES TABLE D-2. R2V4 Alternate Signaling Type Translations Trunk Type colwi colwo colwop co_2w co_2wp fx1wi fx1wo fx1wop fx_2w fx_2wp wt1wi wt1wo ttloau (Note) tt2wda (Note) EQU R2V4 Sig. Type G2 Equiv. Sig.
TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES D-7 Table D-3, Signaling Type Compatibility, provides the compatibility of standard signaling types. The first column is the frame of reference for the direction compatibility. Compatibility is either one way out, one way in, or bidirectional from this entry. TABLE D-3.
D-8 TRUNK TYPE AND SIGNALING TYPE COMPATIBILITY TABLES Table D-4, Signaling Type Definitions, provides definitions for the signaling types used in the other three tables in this appendix. TABLE D-4. Signaling Type Definitions Mnemonic EOU Definition no_signal_req 00 no signaling required ground_start 01 ground start ground_start_w_pt 02 ground start with party test Trad.
ABBREVIATIONS A ampere AAR Automatic Alternate Routing A/CO Analog CO trunk ADFTC analog/digital-facility test circuit AFRL alternate facilities restriction level AIOD automatic identified outward dialing ALU arithmetic logic unit ANI automatic number identification ARS Automatic Route Selection A/TO analog toll office trunk A/TT analog tie trunk AUTOVON Automatic Voice Network AVD alternate voice/data AWG American Wire Gauge B8ZS bipolar with 8-zero substitution BC bearer ca
AB-2 ABBREVIATIONS DACS digital-access and cross-connect system dB decibel DCE data circuit-terminating equipment D/CO digital CO trunk DCP Digital Communications Protocol DID Direct Inward Dialing DIF digital interface frame DIP dual in-line package DMI digital multiplexed interface DMI-BOS digital multiplexed interface with bit-oriented signaling DMI-MOS digital multiplexed interface with message-oriented signaling DNIS dialed-number identification service DPO dial-pulse origina
ABBREVIATIONS IC integrated circuit IE information element INADS Initialization and Administration System ISDN Integrated Services Digital Network ISDN-BRI Integrated Services Digital Network basic rate interface ISDN-PRI Integrated Services Digital Network primary rate interface IXC interexchange carrier LAPD link-access procedure on the D-channel LATA local access and transport area LDN listed directory number LEC local exchange company LFA loss of frame alignment LOS loss of sig
AB-4 ABBREVIATIONS PDS premises distribution system PRI primary rate interface RBS robbed-bit signaling REC Regional Engineering Center RFA remote frame alarm RGI Remote Group Interface RMATS Remote Maintenance, Administration, and Traffic System SAO special-access office SCS system clock synchronizer (TN463) SDN Software Defined Network S/DTT ISL digital tie trunk SID station identification number SLC subscriber link code SLIM subscriber loop interface module SMT system-manag
GLOSSARY 1s density See ones density. 24th-channel signaling Digital signal level 1 (DS1) signaling in which the signaling for each of the first 23 channels is multiplexed onto the 24th channel, thereby providing a full 64Kbps for user data on each of the first 23 channels. Also called alternate voice/data signaling, clear-channel signaling, and out-of-band signaling. See also common-channel signaling and Integrated Services Digital Network primary rate interface.
GL-2 GLOSSARY analog The representation of information by means of continuously variable physical quantities such as amplitude, frequency, phase, or resistance. analog/digitalfacility test circuit (ADFTC) A maintenance circuit resident in communications-system processor port carriers for use in testing the hardware associated with modem pooling. arithmetic logic unit (ALU) The area in a central processor that performs arithmetic and logic functions.
GLOSSARY GL-3 AWG See American Wire Gauge. bandwidth The difference, expressed in hertz, between the highest and lowest frequencies in a range of frequencies that determine channel capacity. baud In telecommunications applications, a unit of transmission speed equal to the number of signal events per second. See also bit rate and bits per second. bit rate The speed at which bits are transmitted, usually expressed in bits per second. Also called data rate. See also baud and bits per second.
GL-4 GLOSSARY binary service format One of two network specific facility (NSF) service types that are administered in conjunction with the Automatic Alternate Routing/Automatic Route Selection (AAR/ARS) routing patterns. The binary service format conveys in a single byte all the necessary information for the service or facility. See also parameterized service format.
GLOSSARY GL-5 channel-division multiplexer (CDM) A device that connects directly to a System 75 or a System 85 digital signal level 1 (DS1) port to provide point-to-point or multipoint nonswitched private-line data connections over the same digital facility that carries intercommunications system traffic. The CDM allows any number of preselected channels from a DS1 facility to bypass the communications system and/or terminate while passing the other channels to the system normally.
GL-6 GLOSSARY clear-channel signaling See 24th-channel signaling and common-channel signaling. clear channel transmission A channel that does not use robbed-bit signaling and does not have the onesdensity requirement for user data. For System 75 and System 85 applications, clear channel transmission happens whenever a channel’s signaling bits are transmitted in a separate channel and whenever the facility is administered for B8ZS line coding.
GLOSSARY GL-7 D4 framing format A format containing 12 frames. See also extended frame and frame. D-channel The 16K-bps or 64K-bps packet-switched channel on an Integrated Services Digital Network basic rate interface (ISDN-BRI) or 64K-bps on an Integrated Services Digital Network primary rate interface (ISDN-PRI) packet-switched channel that carries signaling messages and packet-switched user data. A Dchannel is the (ISDN-PRI) Q.931 signaling channel.
GL-8 GLOSSARY Digital Communication Protocol (DCP) An AT&T proprietary protocol used to transmit both digitized voice and digitized data over the same communications link. A DCP link is made up of two information (I-) channels and one signaling (S-) channel. digital The representation of information in discrete elements such as off and on or 0 and 1. digital data See digital.
GLOSSARY GL-9 EIA (Electronics Industries Association) A trade association of the electronics industry that establishes electrical and functional standards. EDSL See extended digital subscriber line. electronic tandem network (ETN) A private network that consists of private and public trunking and switching resources. ETNs often span geographic areas and consist of private or leased transmission facilities that interconnect the customer’s communications systems.
GL-10 GLOSSARY final trunk group A last-choice trunk group that receives overflow traffic and may receive firstroute traffic. See also trunk group. facilities restriction level (FRL) An assigned number that determines both the kinds of calls that can be made and the kinds of facilities (trunks) that can be used when calls are routed via Automatic Alternate Routing (AAR). See also alternate facilities restriction level.
GLOSSARY GL-11 high-volume tandem A tandem communications system that is used only to selectively route highvolume traffic to alternate routes. See also Automatic Route Selection. hyperactivity A failure condition in which a digital signal level 1 (DS1) facility generates onhook and off-hook stimuli at a very high rate. INADS See Initialization and Administration System. inband signaling Signals transmitted within the same channel and frequency band used for message traffic.
GL-12 GLOSSARY Integrated Services Digital Network primary rate interface (ISDN-PRI) The interface between multiple communications systems that in North America includes 24 64K-bps channels, corresponding to the North American digital signal level 1 (DS1) standard rate of 1.544M-bps.
GLOSSARY ISDN SID-ANI GL-13 A capability that can provide to a called party either the station identification number (SID) or automatic number identification (ANI). The SID is passed as user information; ANI is passed via the call setup. If the SID is used to access internal network information about the calling party, the user obtains information such as the calling party’s location, name, office number, and type of telephone — information that is administered on the communications system.
GL-14 GLOSSARY MEGACOM ® 800 AT&T’s tariffed digital 800-service offering for inward calling. misframe A condition that results when the receive endpoint fails to receive the correct framing pattern. MO See maintenance object. mode 3 A data-communications protocol consisting of the International Standards Organization (ISO) link-access procedure on the D-channel (LAPD) at level 2 and the X.25 packet-layer procedure at level 3.
GLOSSARY GL-15 network synchronization plan An engineering diagram that identifies each customer-premises switching node and specifies how each switching node is to obtain synchronization. Depending on the distribution of work, either the controlling Regional Engineering Center (REC) or the National Engineering Center (NEC) will provide the network synchronization plan.
GL-16 GLOSSARY packet-switched transport mode The condition in which a communications system or network provides packet switching of the user’s data. See also circuit-switched transport mode. NOTE: Although the ISDN protocol defines the Packet Switched Transport Mode and the Generic 2 administration software provides for this transport mode — the switch hardware does not currently include a packet interface.
GLOSSARY GL-17 primary rate interface (PRI) A standard Integrated Services Digital Network (ISDN) frame format that specifies the protocol used between two or more communications systems. PRI runs at 1.544M bps and, as used in North America, provides 23 64K-bps Bchannels (voice or data) and one 64K-bps D-channel (signaling). The D-channel is the 24th channel of the interface and contains multiplexed signaling information for the other 23 channels.
GL-18 GLOSSARY Remote Group A feature that allows a group of port circuits — equivalent to one or more port circuit packs but fewer than one module — to be located up to 100 miles from a communications system, communicating through digital signal level-l (DS1) facilities. Telephones and data terminals connected to these circuits operate as if they were installed at the central location.
GLOSSARY GL-19 Software Defined Network (SDN) An AT&T private networking service created by specialized software within the public network. SDN is designed to carry voice and data traffic between customer locations as well as to off-network locations, and offers a pricing structure based on communications usage, distance, and access-line charges.
GL-20 GLOSSARY terminal balance The measured echo-return and singing-return losses for a port when connected to a specific 2-wire central office (CO) or off-premises network interface. Those connections that have sufficiently high return loss are assigned reduced tie trunk connecting losses without impairing talker echo performance or violating stability criteria.
GLOSSARY GL-21 unrestricted channel A B-channel that uses bipolar with 8-zero substitution (B8ZS) line coding and that does not have a ones-density requirement for user data. See also restricted channel. unrestricted digital data User data that is presented to a transmission facility without having been encoded to prevent an all-0s octet.
GL-22 zero code suppression (ZCS) GLOSSARY A binary-coding scheme that ensures that a data stream contains at least a minimum number of information bits to ensure receiver synchronization. While acceptable for voice transmission, ZCS may not be acceptable for data transmission. See also ones density.
INDEX 1 1s density 1-17, 1-20 2 24th-channel signaling 1-14, 1-15, 2-3 4 4-wire E&M extended range channel units 2-5 5 50-pin (25-pair) connector configurations B-14 551V channel service unit 6-1 551V ST channel service unit 6-1 5ESS to another system 2-7 A AAR assignments 7-46 access ACCUNET 6-3, C-16 code dial 7-26, 7-84 trunk 7-24, 7-82 connector, ISDN B-16 digital, and cross-connect system (DACS) 2-6, 5-6, B-12 equal 7-43, 7-47, 7-101, 7-103 ISDN 7-30 line 1-3 network 7-84, 7-88 nodal services 1-28
IN-2 INDEX Automatic Alternate Routing (AAR) BC 1-24 called party IE 7-38 CBC 7-25 feature groups 7-4 feature parameters 7-104 ISDN dynamic trunk group C-6 network characteristics 7-47 network identifier 7-46 routing tables 7-102 automatic identified outward dialing (AIOD) 7-31, 7-89, 7-92 automatic number identification (ANI) 1-28 Automatic Route Selection (ARS) BC 1-24 BCCOS 7-101 CBC 7-25 ISDN dynamic trunk group C-6 network characteristics 7-44 network identifier 7-42 routing tables 7-100 second dial
INDEX cancelers echo 3-6 CAS 1-29 cascode node connections 5-24 CBC Service Selection 1-28 CCITT BOS specification 7-63 MOS specification 7-15 SS7 7-30, 7-88 standards 1-2 CCR 2-8 CCSA 1-31 CDM applications 2-9 cabling configurations 3-7 framing format 7-8 master clock 5-20 terminal transmission equipment 3-1 CEM cabling configurations 3-7 framing format 7-8 master clock 5-20 terminal equipment connections 2-10 terminal transmission equipment 3-1 Centralized Attendant Service (CAS) 1-29 channel B 1-9 bank
IN-4 INDEX COR 7-112, 7-125, A-2 COS C-1 BC and ISDN routing 7-80 interworking 1-27 translation Generic 1 7-125 Generic 2 7-51 CRC 1-12, 1-14 CRV 1-26 CSU xix, 1-20, 3-2 customer controllable reconfiguration 2-8 service unit 1-20, 3-2 cut-through dialing trunk groups 1-25 cut-through operation 1-31 cyclic redundancy check (CRC) 1-12 D D4 channel bank 2-5, 5-20 framing format ANN11C/ANN11E feature comparison 6-2 AT&T proprietary signaling 1-15 CRC errors 8-8 description 1-10 DS1 signal 8-8 restrictions 2-
INDEX digital— Contd cross-connects 3-1 data 1-9 data transmission 7-9, 7-109, 7-118 facilities, synchronization of 5-1 fixed loss 4-2 loss plan definition 4-1 encodes 4-3 external attenuator 2-5 fixed 4-1 implementing 4-1 low 4-1 port-to-port losses 4-5 multiplexed interface (DMI) administration B-1 alternative to DS1/D4 1-1 digital loss plan 4-2 maintenance 8-1 restrictions 6-3 T1 carrier 3-1 multiplexed interface with bit-oriented signaling (DMI-BOS) digital tie trunks 2-3 DSX-1 3-7 Generic 1 6-4 line-o
IN-6 INDEX DS1— Contd DMI— Contd BOS Generic 1 6-4 line-only mode 5-29 line+trunk mode 5-30 ISDN-PRI port losses 4-6 private-network connections 2-3 public-network connections 2-6 terminal-equipment connections 2-9 DSX-1 cross connect 3-1 echo 3-6 encoding technique 1-8 endpoints 2-3 FAS 1-9 for hybrid module 5-9 for traditional module 5-9 frame 1-10 FXO channel units 2-8 hyperactivity 2-1 links to DACS 2-8 maximum cable length 3-1 metallic cabling 3-2 NFAS configuration 1-9 nonmetallic cabling options 3-
INDEX foreign exchange subscriber (FXS) 4-7 formats facility B-2 four-wire E&M extended range channel units See 4-wire E&M extended range channel units 2-5 frame 1-10 framing D4 1-10, 2-5, 2-7 ESF 2-7 extended superframe (ESF) 2-3 formats 1-10 signaling and line coding 2-6, 2-13 free run ability 5-4 FRL 7-146, C-3 FT3 lightwave 3-2 functioning modules 5-8 fundamentals of DS1 signals 1-1 FXO 6-11 FXS channel unit 2-5, 6-11 loss adjustments 4-7 with gain transfer (FXS/GT) channel units 2-5 G gain transfer 2
IN-8 INDEX interexchange carrier (IXC)—Contd System 85 ARS assignments 7-42 internal clock reference B-9, B-11, B-12 description 5-1 digital network nodes 5-6 requirements 5-4 slips 5-3 definition translations C-10 reference selection rules 5-19 referenced nodes 5-18 interworking 1-27, C-6 Intra-LATA calls, screening 2-7, 2-14 ISDN administration channel versus trunk assignments 7-93 BRI 1-3 call processing 1-25 dynamic trunk ARS network characteristics 7-45 B-channel assignments C-9 feature operation 7-2
INDEX loss— Contd combination tie trunk 4-6 digital 4-1 DS1/DMI/ISDN-PRI 4-6 extended range channel units 4-6 insertion 4-1 ISL digital, low 4-1 of frame alignment (LFA) alarm 8-6, 8-8, 8-9 of signal (LOS) alarm 8-9 OPS ports 4-7 pad group 4-2, 4-3 plan, digital 4-2 plan implementation and provisioning Generic 1 4-3 Generic 2 4-2 port-to-port 4-1, 4-4 total 4-1 trunk type 47 4-2 trunk type 70 4-2 via net 4-1 M maintenance and administration panel (MAAP) 7-1 object (MO) 8-6 options or parameters Generic 1
IN-10 INDEX muitiplexer— Contd CEM— Contd line compensation A-2 digital xx, 3-2 error detection capabilities 8-5 IBM IDNX 6-2, 6-3 IDNX 2-4 incompatibility with 7-109, 7-118 M13 7-10, 7-58 MIC 7-10, 7-58 MX2 7-10, 7-58 MX3 7-10, 7-58 synchronization 5-1 T1 6-1 multipoint 2-10 N NCTE 551V ST xix bipolar violations 1-20 metallic facilities 3-2 powering 3-1 network channel-terminating equipment (NCTE) 551V ST xix bipolar violations 1-20 metallic facilities 3-2 powering 3-1 configurations, DCS 1-29 connectio
INDEX O octet, all-0s 1-18 office interface unit (OIU-2) 2-5 offline module 5-8 off-premises cabling 3-5 station (OPS) applications 7-1 channel assignments 7-62 channel selection 7-13 DS1 termination 7-14 DS1/DMI channel administration 6-12 equipment locations 7-14 facility selection 7-13 line applications 7-56 line assignments 7-62 line option 6-3, 7-6 line-only mode 6-6 line+trunk mode 6-10 matching assignments B-3 ports 4-7, 6-6 special-access channel unit 6-12 time slots 6-6 to another system 2-5 OIU-2
IN-12 INDEX public network connections— Contd DACS to another system 2-8 DS1/DMI 2-6 ISDN-PRI 2-13 System 85 or Generic 2 ISDN-PRI to a 5ESS 2-15 System 85 R2V4, Generic 1, and Generic 2 to a 4ESS 2-13 System 85 R2V4, Generic 1, or Generic 2 to a DACS 2-15 pulse-code modulation (PCM) 1-8, 5-1 Q Q recommendations 1-3 Q.921 1-3 Q.
INDEX service— Contd /facility options—Contd System 85 Release 2 7-7 type, DMI-MOS 2-3 shared channel 2-10 SID-ANI 1-28, 7-128 signal, preequalized 3-9 signaling 2-6 24th-channel 1-14, 2-3 AT&T proprietary 1-14 bundling 2-11 channel 1-4 cross-references D-2 DMI-BOS 1-14, 2-3 DMI-MOS 1-14, 2-3 dual-tone multifrequency (DTMF) 2-6 E&M (reverse-battery) 2-6 framing 2-13 inband 1-14 ISDN trunk 1-25 link code (SLC) 2-7 nonfacility associated 2-14 R2V4 alternate type translations D-6 reverse-battery (E&M) 2-6 rob
IN-14 INDEX System 75 administration options and requirements 7-107 and Generic 1 synchronization architecture 5-11 and Generic 1 synchronization software operation 5-12 System 85 administration options and requirements 7-3 digit collection C-7 synchronization architecture 5-7 synchronization software operation 5-9 traditional module equalizer settings (metallic cable) 3-9 system clock reference using Generic 1 5-30 using Generic 2 5-29 synchronizer 6-3 T T1 definition 3-1 digital carrier 3-1 multiplexer
INDEX toll office—Contd public-network connections 2-6 restrictions A-2 touch-tone capability 2-6, 2-14 transmission availability 5-22 conditions, digital data 1-9 error 1-11 synchronous 5-1 transparent port 6-10, 6-12 transport mode 1-23, 7-77, 7-78 traveling class mark (TCM) C-7 BCC 1-23 display information 7-132 ISDN-PRI routing option 7-23 service type 7-128 trunk group assignments C-7 trunk access code 7-24 and signaling cross references D-2 AVD 1-22 CO 2-8, 7-13 combination tie 2-5, 6-4 DID 6-11, 7-1
IN-16 INDEX voice-grade data— Contd definition 1-8 Generic 1 AVD trunk limitations 7-118 System 75 AVD trunk limitations 7-109 System 85 AVD trunk limitations 7-9 W Wide Area Telecommunications Service (WATS) 2-8, 7-13, D-1 wiring, premises distribution system (PDS) 2-5 X X.
