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AT&T DS1/DMi/ISDN-PRI manual At&T

Models: DS1/DMi/ISDN-PRI

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	AT&T	AT&T 555-025-101
		Issue 4
		April 1990
		April 1990

® Communications

DEFINITY System

and System 75 and System 85

DS1/DMI/ISDN-PRI Reference

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AT&T DS1/DMi/ISDN-PRI manual At&T

Contents

AT&T Page Contents DS1 Transmission and Cabling Synchronization of Digital Facilities Digital Loss PlanLOSS-PLAN Implementation and Provisioning Need for Synchronization Synchronization HierarchyAdministration Options and Requirements Port TYPES/INSTALLATION CompatibilitiesGeneric System 75 R1V2 and R1V3 Maintenance and Alarms Procedure Administrative Procedure SummaryGlossary AB-1GL-1 IndexList of Figures Contents Xiv Contents Procedure 012 Word 1 Name Database Generic Figure A-1 DS1 Circuit Pack Screen Bccos List of TablesUser-to-User IE Opcodes Purpose About this DocumentPrerequisite Skills and Knowledge Intended AudiencesHOW this Document is Organized Abbreviations Glossary Index AppendixesAbout this Document Trademarks and Service Marks HOW to USE this DocumentRelated Sources AT&T HOW to Make Comments about this DocumentXxiv about this Document Introduction Fundamentals of DS1 Signals2INTRODUCTION Introduction Layer4INTRODUCTION MegacomIntroduction 6INTRODUCTION Channels 8INTRODUCTION Voice Voice-grade data Digital dataChannels Channel Backup GenericFraming Formats Circuit-Switched Versus Packet-Switched ChannelsD4 Framing 10INTRODUCTIOND4 Framing ESF Framing Data Link Signal Frame Sync PatternBits Robbed BIT Optional DS1 Signal, Framing Format, and ESF Superframe 24 Frames Robbed-Bit Signaling Signaling Types24th-Channel Signaling 14INTRODUCTIONESF Signaling SuperframeSuperframe Frame No Alternate Mark Inversion Line-Coding Formats16INTRODUCTION Zero Code Suppression and Bipolar with 8 Zero Substitution 1s-Density RequirementUnrestricted or Clear Channel Restricted Channel18INTRODUCTION Introduction Uncoded BIT Stream Pulse Differences Between ZCS and B8ZSViolations Based on Polarity Last 1 Transmitted Communication Protocols and 1s-Density Requirement Bipolar Violations20INTRODUCTION DMI DataImportant Concepts Common-Channel SignalingAlternate Voice/Data AVD Trunks 22INTRODUCTIONSystem 85 R2V4 Bearer Capability BC24INTRODUCTION GenericBccos Switch Parameter Default ValueIsdn Call Processing Outgoing CallsSummary Incoming Calls26INTRODUCTION Introduction System 85 R2V4/Generic 2 CBC Implementation CBC Service Selection28INTRODUCTION Networking Restrictions and ISDN-PRI Limitations Generic 1 Implementation30INTRODUCTION Introduction 32INTRODUCTION Hyperactivity Network DifficultiesGlare 2NETWORK Connections and ConfigurationsDS1/DMI PRIVATE-NETWORK Connections Network Connections and ConfigurationsHost Computer to Another System 4NETWORK Connections and Configurations Other Vendor Digital Switch to Another SystemIBM Idnx Multiplexer to Another System OPS to Another System Via a D4-Channel Bank Analog Switch to Another SystemDS1/DMI PUBLIC-NETWORK Connections 4ESS to Another System Special-Access ConnectionSynchronization Screening Intra-LATA Calls5ESS to Another System Dacs to Another System 8NETWORK Connections and ConfigurationsAnalog CO to Another System Via a D4-Channel Bank CDM DS1/DMI TERMINAL-EQUIPMENT ConnectionsCEM to a BCM32000 10NETWORK Connections and ConfigurationsNetwork Connections and Configurations ISDN-PRI PRIVATE-NETWORK Connections 12NETWORK Connections and ConfigurationsSystem 85 R2 to a System 85 R2V4, Generic 1, or Generic System 85 R2V4, Generic 1, and Generic 2 to a 4ESS ISDN-PRI PUBLIC-NETWORK Connections14NETWORK Connections and Configurations Backup D-ChannelCodeset User-to-User Information transferSynchronization Network Specific FacilitySystem 85 R2V4, Generic 1, or Generic 2 to a Dacs System 85 or Generic 2 ISDN-PRI to a 5ESS16NETWORK Connections and Configurations DS1 Transmission and Cabling DSX-1 Distance Limitations Metallic Cabling OptionsNetwork Channel Terminating Equipment Ncte 2DS1 Transmission and CablingDirect Under 1310 Feet On-Premises CablingDS1 Transmission and Cabling Greater Than 4310 Feet Between 1310 and 4310 Feet4DS1 Transmission and Cabling Maximum FT or Less Off-Premises CablingMaximum DSX-1 DS1 Maximum Distance of 4311 or More6DS1 Transmission and Cabling Nonmetallic Cabling OptionsDSX-1 T E DS1 MaximumDS1/DMI DSX-1 CEM and CDM Cabling ConfigurationsANY DS1 DSX-1 Channel Bank Transmission CDM DSX-1 Or D4 ChannelMedia Dedicated Channel Units Applications CDM only System 85 Traditional Modules Line Equalizer and Compensation SettingsAWG Abam & 24 AWG PDS OFF10DS1 Transmission and Cabling Digital Loss Plan Generic LOSS-PLAN Implementation and Provisioning2THE Digital Loss Plan Digital Loss Plan Encode Loss-Plan Function ANSI/EIA/TIA-464-A-1989 DesignatorDigital conn Loss planLoss PORT-TO-PORT Loss ValuesTransmit Receive Direction Analog Facility DS1/DMI Digital Switch Channel Bank N K ONSA L Terminating a DS1 AT a Channel Bank DS1/DMI/ISDN-PRI Port LossesTie Trunk Ports CO did Trunk PortsOPS Ports 8THE Digital Loss Plan Need for Synchronization Synchronization of Digital FacilitiesTransmit 2SYNCHRONIZATION of Digital FacilitiesChannel Analog Bank Receive Bank Transmit Digital BIT StreamSynchronization of Digital Facilities Synchronization Hierarchy4SYNCHRONIZATION of Digital Facilities Page 6SYNCHRONIZATION of Digital Facilities System 85 and Generic 2 Synchronization Architecture Page System 85 and Generic 2 Synchronization Software Operation Indicators Primary Secondary Reference IndicatorsBlue YEL Good LOS Misf REDSystem 75 and Generic 1 Synchronization Architecture System 75 and Generic 1 Synchronization Software Operation Criteria for Switching Back to the Primary Reference Criteria for Switching to the Secondary Reference14SYNCHRONIZATION of Digital Facilities External Synchronization ClockSynchronization of Digital Facilities 16SYNCHRONIZATION of Digital Facilities External-Clock Interface Network Synchronization and Engineering Selecting a Timing Source for the Switch18SYNCHRONIZATION of Digital Facilities Rule Internal Reference Selection RulesDigital Transmission Facilities Primary Frequency Reference 20SYNCHRONIZATION of Digital Facilities13.Proper Use of Backup Facilities Page 15.Optimal Diverse Routing 16.Less Than Optimal Diverse Routing 17.Excessive Cascading 26SYNCHRONIZATION of Digital Facilities 19.Excessive Synchronization from One NodeRules 2 Through External-Reference Selection RulesMisconception Availability of Synchronization SourcesFact 28SYNCHRONIZATION of Digital FacilitiesConclusions on Synchronization Line-Only Mode DS1/DMI-BOS ANN11 or TN767USE of Generic 2 AS a System Clock Reference ISDN-PRI Trunk Facilities ANN35 or TN767 with TN755DMI-MOS ANN35 or TN767 with TN755 Line+Trunk Mode DS1/DMI-BOS ANN35 or TN767 with TN555USE of Generic 1 AS a System Clock Reference Trunk-Mode ISDN-PRI TN767Trunk-Mode DS1/DMI-MOS TN767 Line-Only Mode DS1/DMI-BOS TN76732SYNCHRONIZATION of Digital Facilities Port TYPES/INSTALLATION Compatibilities FX, Wats 2PORT TYPES/INSTALLATION CompatibilitiesDMI-BOS E Port TYPES/INSTALLATION Compatibilities 4PORT TYPES/INSTALLATION Compatibilities Operating ModeGeneric 1 DS1/DMI-BOS Supported Port TypesDMI Trunks Line-Only ModeGeneric 1 ISDN-PRI System 85 DS1, Traditional Modules ANN116PORT TYPES/INSTALLATION Compatibilities Line+Trunk ModePort TYPES/INSTALLATION Compatibilities Others OPS Other Circuit Packs OPS PORTS/CARRIER SlotPort TYPES/INSTALLATION Compatibilities Carrier Slots P T Y 10PORT TYPES/INSTALLATION Compatibilities Line+Trunk Mode Port Grouping RulesDid Trunk DMI-BOS TrunksGround-Start CO Trunk Loop-Start CO Trunk 12PORT TYPES/INSTALLATION CompatibilitiesOf-Premises Stations Transparent PortsSystem 85 DS1 or DMI-MOS, Traditional Modules ANN35 Port Grouping Rules 14PORT TYPES/INSTALLATION CompatibilitiesAdministration Options and Requirements 2ADMINISTRATION Options and Requirements Administration Options and Requirements System Procedure 275 Word 4 Isdn Service Enable/DisableSystem 85 R2V1 Through R2V4 FieldProcedure 250 Word 1 DS1 Carrier Designation Procedure 276 Word 1 Other Feature Groups4ADMINISTRATION Options and Requirements System Display onlyPosition V1-V4Module Control Procedure 260 Word 1 DS1/DMI/ISDN-PRI Physical Interface Slot numbers 0, 5, 13, or 18 for line-only operation Service or Facility OptionsCan be assigned V1-V2 V3-V4 Voice/data AVD10ADMINISTRATION Options and Requirements System Criteria for Switching Back to the Primary Facility Criteria for Switching to the Secondary Facility12ADMINISTRATION Options and Requirements System DS1/OPS Related Translations DS1 Channel Slot/Circuit 14ADMINISTRATION Options and Requirements SystemV4 Only DS1/DMI-BOS applications should be administered with aSupported. Therefore, option one is not applicable 16ADMINISTRATION Options and Requirements System Procedure 262 Word 1 Isdn Board ParametersFields PRI ParametersField Procedure 354 Word 3 NPA-NXX Digits Assignment Enhanced Mode Procedure 354, Word NPA-NXX Assignment Procedure 000 Word 4 NPA-NXX Index Designator20ADMINISTRATION Options and Requirements System Range of 1 through 22ADMINISTRATION Options and Requirements System Field Enhanced Mode Procedure 100, Word Trunk Group Translation 24ADMINISTRATION Options and Requirements SystemDial Access CODE/TRUNK ID Code Did Trunk Description TypeIsdn TIE WatsAdministration Options and REQUIREMENT’S System Procedure 100 Word 2 Trunk Group Data TranslationsModem Pooling Procedure 100 Word 3 Isdn Trunk Group Signaling OptionsData Rate Sychronous Duplex28ADMINISTRATION Options and Requirements System Field Isdn network features is desired Field 1 Field Fields Fields 9-11 Field 32ADMINISTRATION Options and Requirements SystemThis field is ignored by Isdn software 34ADMINISTRATION Options and Requirements System Procedure 116 Word 1 DS1/DMI/ISDN-PRI Trunk Assignments 36ADMINISTRATION Options and Requirements System DS1/ISDN-PRI Administration Channel Versus Trunk Assignments 38ADMINISTRATION Options and Requirements System Procedure 012 Word 1 Name DatabaseThrough 99999, for extension and directory numbers Procedure 012 Word 2 Name Database Enhanced Mode Procedure 012, Word Name Database Entry Procedure 012 Word 3 Name DatabaseCharater Encodes Enhanced Mode Procedure 012, Word Name Database Compaction 42ADMINISTRATION Options and Requirements SystemIXC Isdn Enhanced Mode Procedure 309, Word ARS Route TablesBearer Capability 44ADMINISTRATION Options and Requirements SystemNetwork Service or Network Service/Feature Options, shows the relationshipsNetwork Feature Value Trunk Type Isdn46ADMINISTRATION Options and Requirements System AAR System 85 R2V4, depicts the procedureEnhanced Mode Procedure 321, Word AAR Route Tables Bearer Capability NSF IXC Procedure Word FieldNSF TNSTTL Telephone Digits 23. ProcedureTerminating Test Line Telephone Digits Maximum Preemption Level Administrable Alarms Administration Options and Requirements GenericGeneric Attendant Release Loop OperationSNC 52ADMINISTRATION Options and Requirements GenericProcedure 250 Word 1 SC/DS1 Carrier Designation Field Fields 54ADMINISTRATION Options and Requirements GenericSC Information Connected to CC0 ON-LINE Enter command ISDN-PRI Equipment Traditional Universal Parameter ModuleThat Zero Code Suppression ZCS Criteria for Switching to the Secondary Criteria for Switching Back to the Primary Field 62ADMINISTRATION Options and Requirements Generic Field 133 to 90 to 266 to 180 to 399 to 270 to 532 to 360 to Distance to Midpoint Compensation Or Endpoint FTPRI and BRI Layer 2 Parameters BRI OnlyDepending on the particular facility NFAS-PRI Only Procedure 262 Word 2 ISDN-PRI D-Channel BackupBackup Channel Equipment Location 68ADMINISTRATION Options and Requirements GenericPrimary D-CHANNEL Equipment Location Procedure 262 Word 3 ISDN-PRI Codeset Map Assignments Performance Mapped from CODESET/INFORMATION Element Enhanced Mode Procedure 280, Word Isdn Codeset MappingMapped to CODESET/INFORMATION Element Field Field 6 Field IE Name Codeset NPA Enhanced Mode Procedure 354, WordNXX 74ADMINISTRATION Options and Requirements Generic 34.Procedure 000 Word 4 NPA-NXX Index DesignatorLDN Enhanced Mode Procedure 210, WordNPA-NXX Differences Between System 85 R2V4 and Generic Procedure 014 Word 1 Bccos Routing OptionsCall Types and Action Taken COS Default Capabilities78ADMINISTRATION Options and Requirements Generic Procedure 014 Word 2 Bccos Data OptionsOr is not 0 supported 80ADMINISTRATION Options and Requirements Generic 38.Procedure 010 Word 4 Terminal COS Restrictions GenericField Enhanced Mode Procedure 100, Word 82ADMINISTRATION Options and Requirements GenericIsdn DMI84ADMINISTRATION Options and Requirements Generic 40. Procedure 86ADMINISTRATION Options and Requirements Generic Not applicable For Whether access to other Isdn network features is desired Assigns whether the trunk group has 1 or does not have Procedure 103 Word 1 Network Trunk Group Translations AAR/ARS Channel Versus Trunk Assignments 92ADMINISTRATION Options and Requirements GenericDS1 Channel Slot/Circuit 94ADMINISTRATION Options and Requirements Generic 45.Procedure 012 Word 1 Name Database GenericFrom 1 to Character Encodes 96ADMINISTRATION Options and Requirements Generic47.Procedure 012 Word 3 Name Database Generic Field Enhanced Mode Procedure 279, Word NETWORK-SPECIFIC Facility 98ADMINISTRATION Options and Requirements GenericIsdn Network Definition Parameters11. Network Network Parameterized Feature FacilityName Coding Value Binary100ADMINISTRATION Options and Requirements Generic Procedure 309 Word 1 ARS Route TablesEnhanced Mode Procedure 309, Word Procedure 309 Word 5 ARS-ISDN BccosProcedure 321 Word 1 AAR Tables Generic Services/Network Features, for the appropriate encode102ADMINISTRATION Options and Requirements Generic Enhanced Mode Procedure 321, Word 104ADMINISTRATION Options and Requirements Generic Procedure 321 Word 5 AAR-ISDN and Other Feature Parameters53.Procedure 107 Word 1 Atms TTL Assignment System 85 R2V4 106ADMINISTRATION Options and Requirements Generic Procedure 108 Word 1 Isdn Trunk Group TTL Number DigitsDMI-BOS? Maintenance Parameters Service/Facility OptionsSystem 75 R1V2 and R1V3 DS1 Circuit PackCompensation Value Distance Feet 108ADMINISTRATION Options and Requirements System109 Detection SlipRemote LoopDS1 Circuit Packs Synchronization PlanTrunk Group/Trunk Group Members 112ADMINISTRATION Options and Requirements SystemPort DelayName ModeCall 114ADMINISTRATION Options and Requirements SystemACA AAR/ARS 116ADMINISTRATION Options and Requirements Generic 60.DS1 Circuit Pack Screen, Common-Channel SignalingLine Location118ADINISTRATION Options and Requirements Generic Interface 120ADMINISTRATION Options and Requirements Generic Call COR Trunk Group/Trunk Group Members DS1 Trunk ApplicationsSTT DTTBCC 122ADMINISTRATION Options and Requirements GenericAvd or data In/outPBX ID Trunk Group ACANight With auto ModeProcessor Interface Data Module ISDN-PRI Applications Physical Data ExtensionChannel Processor Channel Assignments ISDN-PRI ApplicationsAppl Proc ChanLink Chan PriorityDTE/DCE Trunking Considerations ISDN-PRI Applications 128ADMINISTRATION Options and Requirements GenericAdvantages of CBC Trunking Either a feature 0, or service FeatureNetwork Facilities ISDN-PRI Applications NETWORK-FACILITIESTrunk Group ISDN-PRI Trunk Applications CodingCOR TAC Service Dial AccessService Type Options access, tieDisplay/TCM SendMax Message SizeSID? Trunk FeaturesSID/ANI 134ADMINISTRATION Options and Requirements Generic Application Example #1 DelApplication Example #2 Per Call InsertSID/ANI CaseApplication for Case 2 being selected Application for Case 1 being selected most restrictiveApplication for Case 3 being selected Application for Case 4 being selected 138ADMINISTRATION Options and Requirements GenericExample Screen Entries for Cases Applications for CasesTrunk Group Usage Allocation ISDN-PRI Applications PBXUsage 140ADMINISTRATION Options and Requirements GenericAllocation PlanAn Example Application for Usage Allocation Plans Min# Chan Max# ChanFixed 142ADMINISTRATION Options and Requirements GenericNumber Scheduled CBC Trunk Group Usage Allocation Plan Assignment Schedule75.Trunk Group Screen, Page 5 ISDN-PRI Trunk Group Member Assignments ISDN-PRI Trunk ApplicationsName Night 144ADMINISTRATION Options and Requirements GenericSID Prefix Table ISDN-PRI Applications SID PrefixSID Prefix Ext CodeAn Example Application that uses SID Routing Patterns ISDN-PRI Applications 146ADMINISTRATION Options and Requirements GenericNumber PatternGrp No FRLNo. Del 148ADMINISTRATION Options and Requirements GenericDigits InsertedHunt Group ISDN-PRI Applications BandTerminating Extension Group ISDN-PRI Applications 150ADMINISTRATION Options and Requirements GenericHunt Group ACD?Terminating Extension Group 152ADMINISTRATION Options and Requirements Generic Generic 2 Maintenance Capabilities and Concerns Generic 1 and Generic 2 ISDN-PRI Maintenance Philosophy2MAINTENANCE and Alarms Generic 2 Maintenance ProceduresMaintenance and Alarms 4MAINTENANCE and Alarms Summary of Generic 2 Maintenance Capabilities Generic 1 Maintenance Procedures Generic 1 Maintenance Capabilities and Concerns6MAINTENANCE and Alarms Alarms Summary of Generic 1 Maintenance CapabilitiesCircuit Pack Alarms Yellow LEDExcessive Misframe and CRC Errors Facility AlarmsLFA Alarm 8MAINTENANCE and AlarmsLoss of Signal Alarm Remote Frame AlarmMajor and Minor Alarms Blue AlarmFraming Mode Alarm Type Conversion 10MAINTENANCE and AlarmsAdministration Requirements Megacom COR 2ADMINISTRATION RequirementsPBX ID ACA Administration Requirements 4ADMINISTRATION Requirements DCS? PBX ID Figure A-5.Trunk Group Screen, Page 1 SDNFacilities, for details 6ADMINISTRATION RequirementsDacs TRANSLATIONS-BASED ProblemsTransmission Facility 2SAMPLE Installation and Maintenance ProblemsTrunks and Trunk Groups Sample Installation and Maintenance ProblemsType 4SAMPLE Installation and Maintenance ProblemsCEMs CDMsSystem DS1 or DMI6SAMPLE Installation and Maintenance Problems D4-Channel Banks Sample Installation Maintenance Problems8SAMPLE Installation and Maintenance Problems SYNCHRONIZATION-RELATED ProblemsLeavenworth Loop Loss of or No SynchronizationFigure B-10.Leavenworth Loop on the Primary Reference D4 Synchronization ProblemsSample Installation and Maintenance Problems 12SAMPLE Installation and Maintenance Problems Digital CO Synchronization ProblemsDacs Figure B-15.Synchronization from Dacs Node Typical Physical Interface Connection ProblemsInitial System 85 DS1 or DMI Pinout for 50-PIN Connector 14SAMPLE Installation and Maintenance ProblemsCABLE/CONNECTORS Initial or OLD PDS Compatible System Installation Maintenance ProblemsC6C To WIRE-LUGS System Intracabinet16SAMPLE Installation and Maintenance Problems Specific Cabling Options Permitted Cabling Combinations 18SAMPLE Installation and Maintenance ProblemsUsing cable GR-380 Permitted Cabling Combinations Using PDS20SAMPLE Installation and Maintenance Problems Permitted Cabling Combinations Using PDS 22SAMPLE Installation and Maintenance Problems Voice Procedure 000 Word 3 Generic 2 Only2ADMINISTRATIVE Procedure Summary Mode Voice Grade Data Unknown Digital Analog Mode 3/2Procedure 010 Word 4 System 85 R2V4 & Generic Procedure 000 Word 4 System 85 R2V4 & GenericAdministrative Procedure Summary Isdn Routing Parameters System 85 R2V4 & GenericBC System 85 R2V4 Only 4ADMINISTRATIVE Procedure SummaryVoice or Voice Grade Data Procedure 100 Word 1 System 85 R2V4 & Generic Procedure 012 System 85 R2V4 & Generic6ADMINSTRATIVE Procedure Summary Procedure 100 Word 2 Generic 2 OnlyRules for Trunk Type 120 System 85 R2V4 & Generic Procedure Procedure 100 Word 3 System 85 R2V4 & GenericTCM 8ADMINISTRATIVE Procedure Summary Procedure 107 Word 1 System 85 R2V4 & GenericCalled-Party Number IE System 85 R2V4 & Generic For international calls that is, a dial Calls For ARS callsProcedure 116 Word 1 System 85 R2V4 & Generic Procedure 108 Word 1 System 85 R2V4 & GenericProcedure 210 Word 2 System 85 R2V4 & Generic Procedure 260 Word 1 System 85 R2V4 & Generic10ADMINISTRATIVE Procedure Summary Procedure 275 Word 4 System 85 R2V4 & Generic Procedure 262 Word 3 Generic 2 OnlyProcedure 279 Word 1 Generic 2 Only Procedure 280 Word 1 Generic 2 OnlyIE Opcode Value 12ADMINISTRATIVE Procedure SummaryInformation Element IE Name R2V4 Information Element IE Name Opcode ValueField 5, Network Service Value Procedure 309 Word 5 System 85 R2V4 & GenericField 4, Isdn Trunk Type NSF IE System 85 R2V4 14ADMINISTRATIVE Procedure SummaryThrough 288 Outwats Band NSFs SDN NSF Megacom NSFNSF IE Generic Wats NSF Accunet via encodeBC System 85 R2V4 and Generic 16ADMINISTRATIVE Procedure SummaryFields 6-10 System 85 R2V4 Procedure 354 Word 3 System 85 R2V4 & Generic Procedure 321 Word 5 System 85 R2V4 & GenericField 6 Generic 18ADMINISTRATIVE Procedure Summary Procedure 420 System 85 R2V4 & GenericAdministrative Procedure Summary 20ADMINISTRATIVE Procedure Summary Trunk/Signaling Cross-references Trunk Type and Signaling Type Compatibility TablesAplt 2TRUNK Type and Signaling Type Compatibility TablesWats Trunk Type and Signaling Type Compatibility TablesDid TIEMAIN/SAT CASISDN/PRI NDM-ITrunk 6TRUNK Type and Signaling Type Compatibility TablesEQU R2V4 G2 Equiv Type Sig. TypeTrunk Type and Signaling Type Compatibility Tables ANN11 8TRUNK Type and Signaling Type Compatibility TablesS BC BCC Bccos bps AAR F T C Afrl Aiod ALU ANI ARS Autovon AVD AWGCBC Ccitt CCR Ccsa CDM CEM COR COS CRC CSU AB-2ABBREVIATIONS Dacs dBAbbreviations AB-3 AB-4ABBREVIATIONS Adftc Afrl Aiod AccunetMegacom Tandem Data transmissionGL-2GLOSSARY B8ZS AWGParameterized service format Binary serviceBit error rate Burstiness Ports, packet switching,Glossary GL-5 See network channel-terminating equipmentUnrestricted digital data Cross couplingQ.931 See cyclic redundancy checkDTE Dnis DMI-MOSDS1 EIA GL-9ETN EpscsHdlc GRSInads Isdn network- See Isdn network identifier. service value See Integrated Services Digital NetworkClock reference GL-12GLOSSARYIsdn SID-ANI Lata LFA Loss of signalStation identification number See loss of frame alignmentNcte MpdmDigital Network primary rate interface OPS OPXNetwork primary rate interface Glossary GL-15PAM PC/PBX PADPCM PDM PDS PRIPCM PAMSee remote frame alarm See Remote Group Robbed-bit signalingSDN See Software Defined NetworkSS7 Multiplexed switch Switch TMSSee time-multiplexed switch Transport modeZCS Zero code Accunet 6-3,C-16code Network 7-84,7-88nodal servicesEqual 7-43,7-47,7-101,7-103ISDN AdftcBC 1-22,C-16 BC code 7-23,7-81 AVD 1-22,7-9Bccos 1-24,C-1 Violation 1-18,1-20,3-3CEM Ccitt9bank D4 1-1,2-5D-type1-1 9deltaCRC 1-12,1-14CRV CSU xix, 1-20,3-2customer COR 7-112,7-125,A-2DCE 1-21,7-127D-channel BOS NPA-NXX7-28,7-72I -Contd BOS-Contd Index IN-5DS1- Contd IN-6 IndexDTE 2-18 EIAFXS D4 1-10,2-5,2-7Index IN-7 Lapd 1-3,7-17LATA 2-7layer 1 1-3layer 2 IN-8 IndexLEC Voice 1-23,7-33voice-grade data 1-23,1-24ZCS Misframe 1-11,1-14MOCDM Index IN-9Ncte IN-10 IndexNPA-NNX C-17 Ports 4-7,6-6 OPSPCM 1-8,5-1PCM data Channel1-5,1-9,7-57facility 7-11,7-59RNX 1-27robbed-bit signaling 9sources SS7 7-30,7-88Index IN-13 CEM 2-10terminating IN-14 IndexTMS FX 2-8,7-13ground-start CO 6-11group CO 2-8,7-13combination tie 2-5,6-4DID 6-11,7-13Members 7-35,7-92Generic 1 108IN-16 Index