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AT&T DS1/DMi/ISDN-PRI manual

Models: DS1/DMi/ISDN-PRI

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Contents

AT&T Page Contents DS1 Transmission and Cabling LOSS-PLAN Implementation and Provisioning Digital Loss PlanSynchronization of Digital Facilities Need for Synchronization Synchronization HierarchyPort TYPES/INSTALLATION Compatibilities Administration Options and RequirementsGeneric System 75 R1V2 and R1V3 Maintenance and Alarms Administrative Procedure Summary ProcedureGL-1 AB-1Glossary IndexList of Figures Contents Xiv Contents Procedure 012 Word 1 Name Database Generic Figure A-1 DS1 Circuit Pack Screen List of Tables BccosUser-to-User IE Opcodes About this Document PurposeHOW this Document is Organized Intended AudiencesPrerequisite Skills and Knowledge About this Document AppendixesAbbreviations Glossary Index Related Sources HOW to USE this DocumentTrademarks and Service Marks HOW to Make Comments about this Document AT&TXxiv about this Document Fundamentals of DS1 Signals Introduction2INTRODUCTION Layer IntroductionMegacom 4INTRODUCTIONIntroduction 6INTRODUCTION Channels Voice Voice-grade data Digital data 8INTRODUCTIONChannel Backup Generic ChannelsD4 Framing Circuit-Switched Versus Packet-Switched ChannelsFraming Formats 10INTRODUCTIOND4 Framing Bits Robbed BIT Optional Data Link Signal Frame Sync PatternESF Framing DS1 Signal, Framing Format, and ESF Superframe 24 Frames 24th-Channel Signaling Signaling TypesRobbed-Bit Signaling 14INTRODUCTIONSuperframe Frame No Signaling SuperframeESF 16INTRODUCTION Line-Coding FormatsAlternate Mark Inversion 1s-Density Requirement Zero Code Suppression and Bipolar with 8 Zero Substitution18INTRODUCTION Restricted ChannelUnrestricted or Clear Channel Violations Based on Polarity Last 1 Transmitted Differences Between ZCS and B8ZSIntroduction Uncoded BIT Stream Pulse 20INTRODUCTION Bipolar ViolationsCommunication Protocols and 1s-Density Requirement Data DMIAlternate Voice/Data AVD Trunks Common-Channel SignalingImportant Concepts 22INTRODUCTIONBearer Capability BC System 85 R2V4Generic 24INTRODUCTIONIsdn Call Processing Switch Parameter Default ValueBccos Outgoing Calls26INTRODUCTION Incoming CallsSummary Introduction 28INTRODUCTION CBC Service SelectionSystem 85 R2V4/Generic 2 CBC Implementation Generic 1 Implementation Networking Restrictions and ISDN-PRI Limitations30INTRODUCTION Introduction 32INTRODUCTION Network Difficulties Hyperactivity2NETWORK Connections and Configurations GlareHost Computer to Another System Network Connections and ConfigurationsDS1/DMI PRIVATE-NETWORK Connections IBM Idnx Multiplexer to Another System Other Vendor Digital Switch to Another System4NETWORK Connections and Configurations Analog Switch to Another System OPS to Another System Via a D4-Channel Bank4ESS to Another System Special-Access Connection DS1/DMI PUBLIC-NETWORK Connections5ESS to Another System Screening Intra-LATA CallsSynchronization Analog CO to Another System Via a D4-Channel Bank 8NETWORK Connections and ConfigurationsDacs to Another System DS1/DMI TERMINAL-EQUIPMENT Connections CDM10NETWORK Connections and Configurations CEM to a BCM32000Network Connections and Configurations System 85 R2 to a System 85 R2V4, Generic 1, or Generic 12NETWORK Connections and ConfigurationsISDN-PRI PRIVATE-NETWORK Connections ISDN-PRI PUBLIC-NETWORK Connections System 85 R2V4, Generic 1, and Generic 2 to a 4ESSCodeset Backup D-Channel14NETWORK Connections and Configurations User-to-User Information transferSystem 85 R2V4, Generic 1, or Generic 2 to a Dacs Network Specific FacilitySynchronization System 85 or Generic 2 ISDN-PRI to a 5ESS16NETWORK Connections and Configurations DS1 Transmission and Cabling Network Channel Terminating Equipment Ncte Metallic Cabling OptionsDSX-1 Distance Limitations 2DS1 Transmission and CablingDS1 Transmission and Cabling On-Premises CablingDirect Under 1310 Feet 4DS1 Transmission and Cabling Between 1310 and 4310 FeetGreater Than 4310 Feet Maximum DSX-1 DS1 Off-Premises CablingMaximum FT or Less Maximum Distance of 4311 or MoreDSX-1 T E DS1 Nonmetallic Cabling Options6DS1 Transmission and Cabling MaximumCEM and CDM Cabling Configurations DS1/DMI DSX-1Media Dedicated Channel Units Applications CDM only CDM DSX-1 Or D4 ChannelANY DS1 DSX-1 Channel Bank Transmission AWG Abam & 24 AWG PDS Line Equalizer and Compensation SettingsSystem 85 Traditional Modules OFF10DS1 Transmission and Cabling Digital Loss Plan 2THE Digital Loss Plan LOSS-PLAN Implementation and ProvisioningGeneric Encode Loss-Plan Function ANSI/EIA/TIA-464-A-1989 Designator Digital Loss PlanLoss Loss planDigital conn PORT-TO-PORT Loss ValuesA L Analog Facility DS1/DMI Digital Switch Channel Bank N K ONSTransmit Receive Direction Tie Trunk Ports DS1/DMI/ISDN-PRI Port LossesTerminating a DS1 AT a Channel Bank CO did Trunk PortsOPS Ports 8THE Digital Loss Plan Synchronization of Digital Facilities Need for SynchronizationChannel Analog Bank Receive 2SYNCHRONIZATION of Digital FacilitiesTransmit Bank Transmit Digital BIT StreamSynchronization Hierarchy Synchronization of Digital Facilities4SYNCHRONIZATION of Digital Facilities Page 6SYNCHRONIZATION of Digital Facilities System 85 and Generic 2 Synchronization Architecture Page System 85 and Generic 2 Synchronization Software Operation Blue YEL Good LOS Misf Primary Secondary Reference IndicatorsIndicators REDSystem 75 and Generic 1 Synchronization Architecture System 75 and Generic 1 Synchronization Software Operation Criteria for Switching to the Secondary Reference Criteria for Switching Back to the Primary ReferenceExternal Synchronization Clock 14SYNCHRONIZATION of Digital FacilitiesSynchronization of Digital Facilities 16SYNCHRONIZATION of Digital Facilities External-Clock Interface 18SYNCHRONIZATION of Digital Facilities Selecting a Timing Source for the SwitchNetwork Synchronization and Engineering Internal Reference Selection Rules Rule20SYNCHRONIZATION of Digital Facilities Digital Transmission Facilities Primary Frequency Reference13.Proper Use of Backup Facilities Page 15.Optimal Diverse Routing 16.Less Than Optimal Diverse Routing 17.Excessive Cascading 19.Excessive Synchronization from One Node 26SYNCHRONIZATION of Digital FacilitiesExternal-Reference Selection Rules Rules 2 ThroughFact Availability of Synchronization SourcesMisconception 28SYNCHRONIZATION of Digital FacilitiesUSE of Generic 2 AS a System Clock Reference Line-Only Mode DS1/DMI-BOS ANN11 or TN767Conclusions on Synchronization ISDN-PRI Trunk Facilities ANN35 or TN767 with TN755USE of Generic 1 AS a System Clock Reference Line+Trunk Mode DS1/DMI-BOS ANN35 or TN767 with TN555DMI-MOS ANN35 or TN767 with TN755 Trunk-Mode ISDN-PRI TN767Line-Only Mode DS1/DMI-BOS TN767 Trunk-Mode DS1/DMI-MOS TN76732SYNCHRONIZATION of Digital Facilities Port TYPES/INSTALLATION Compatibilities DMI-BOS E 2PORT TYPES/INSTALLATION CompatibilitiesFX, Wats Port TYPES/INSTALLATION Compatibilities Generic 1 DS1/DMI-BOS Operating Mode4PORT TYPES/INSTALLATION Compatibilities Supported Port TypesGeneric 1 ISDN-PRI Line-Only ModeDMI Trunks System 85 DS1, Traditional Modules ANN11Line+Trunk Mode 6PORT TYPES/INSTALLATION CompatibilitiesPort TYPES/INSTALLATION Compatibilities OPS Other Circuit Packs OPS PORTS/CARRIER Slot OthersPort TYPES/INSTALLATION Compatibilities Carrier Slots P T Y Line+Trunk Mode Port Grouping Rules 10PORT TYPES/INSTALLATION CompatibilitiesGround-Start CO Trunk DMI-BOS TrunksDid Trunk Of-Premises Stations 12PORT TYPES/INSTALLATION CompatibilitiesLoop-Start CO Trunk Transparent PortsSystem 85 DS1 or DMI-MOS, Traditional Modules ANN35 14PORT TYPES/INSTALLATION Compatibilities Port Grouping RulesAdministration Options and Requirements 2ADMINISTRATION Options and Requirements System 85 R2V1 Through R2V4 Procedure 275 Word 4 Isdn Service Enable/DisableAdministration Options and Requirements System Field4ADMINISTRATION Options and Requirements System Procedure 276 Word 1 Other Feature GroupsProcedure 250 Word 1 DS1 Carrier Designation Display onlyModule Control V1-V4Position Procedure 260 Word 1 DS1/DMI/ISDN-PRI Physical Interface Can be assigned Service or Facility OptionsSlot numbers 0, 5, 13, or 18 for line-only operation V1-V2 Voice/data AVD V3-V410ADMINISTRATION Options and Requirements System Criteria for Switching to the Secondary Facility Criteria for Switching Back to the Primary Facility12ADMINISTRATION Options and Requirements System DS1/OPS Related Translations 14ADMINISTRATION Options and Requirements System DS1 Channel Slot/CircuitSupported. Therefore, option one is not applicable DS1/DMI-BOS applications should be administered with aV4 Only Fields Procedure 262 Word 1 Isdn Board Parameters16ADMINISTRATION Options and Requirements System PRI ParametersField Procedure 354 Word 3 NPA-NXX Digits Assignment Procedure 000 Word 4 NPA-NXX Index Designator Enhanced Mode Procedure 354, Word NPA-NXX Assignment20ADMINISTRATION Options and Requirements System Range of 1 through 22ADMINISTRATION Options and Requirements System Field Dial Access CODE/TRUNK ID Code 24ADMINISTRATION Options and Requirements SystemEnhanced Mode Procedure 100, Word Trunk Group Translation Isdn TIE Trunk Description TypeDid WatsProcedure 100 Word 2 Trunk Group Data Translations Administration Options and REQUIREMENT’S SystemData Rate Procedure 100 Word 3 Isdn Trunk Group Signaling OptionsModem Pooling Sychronous Duplex28ADMINISTRATION Options and Requirements System Field Isdn network features is desired Field 1 Field 32ADMINISTRATION Options and Requirements System Fields Fields 9-11 FieldThis 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 Procedure 012 Word 1 Name Database 38ADMINISTRATION Options and Requirements SystemThrough 99999, for extension and directory numbers Procedure 012 Word 2 Name Database Charater Encodes Procedure 012 Word 3 Name DatabaseEnhanced Mode Procedure 012, Word Name Database Entry 42ADMINISTRATION Options and Requirements System Enhanced Mode Procedure 012, Word Name Database CompactionEnhanced Mode Procedure 309, Word ARS Route Tables IXC Isdn44ADMINISTRATION Options and Requirements System Bearer CapabilityNetwork Feature Value Trunk Type Network Service/Feature Options, shows the relationshipsNetwork Service or IsdnEnhanced Mode Procedure 321, Word AAR Route Tables AAR System 85 R2V4, depicts the procedure46ADMINISTRATION Options and Requirements System Bearer Capability NSF Procedure Word FieldNSF IXC TNS23. Procedure TTL Telephone DigitsTerminating Test Line Telephone Digits Generic Administration Options and Requirements GenericMaximum Preemption Level Administrable Alarms Attendant Release Loop Operation52ADMINISTRATION Options and Requirements Generic SNCProcedure 250 Word 1 SC/DS1 Carrier Designation 54ADMINISTRATION Options and Requirements Generic Field FieldsSC Information Connected to CC0 ON-LINE Enter command Equipment Traditional Universal Parameter Module ISDN-PRIThat Zero Code Suppression ZCS Criteria for Switching to the Secondary Criteria for Switching Back to the Primary Field 62ADMINISTRATION Options and Requirements Generic Field Distance to Midpoint Compensation Or Endpoint FT 133 to 90 to 266 to 180 to 399 to 270 to 532 to 360 toBRI Only PRI and BRI Layer 2 ParametersDepending on the particular facility Procedure 262 Word 2 ISDN-PRI D-Channel Backup NFAS-PRI OnlyPrimary D-CHANNEL Equipment Location 68ADMINISTRATION Options and Requirements GenericBackup Channel Equipment Location Procedure 262 Word 3 ISDN-PRI Codeset Map Assignments Performance Mapped to CODESET/INFORMATION Element Enhanced Mode Procedure 280, Word Isdn Codeset MappingMapped from CODESET/INFORMATION Element Field Field 6 Field IE Name Codeset NXX Enhanced Mode Procedure 354, WordNPA 34.Procedure 000 Word 4 NPA-NXX Index Designator 74ADMINISTRATION Options and Requirements GenericNPA-NXX Enhanced Mode Procedure 210, WordLDN Procedure 014 Word 1 Bccos Routing Options Differences Between System 85 R2V4 and GenericCOS Default Capabilities Call Types and Action TakenProcedure 014 Word 2 Bccos Data Options 78ADMINISTRATION Options and Requirements GenericOr is not 0 supported 38.Procedure 010 Word 4 Terminal COS Restrictions Generic 80ADMINISTRATION Options and Requirements GenericField 82ADMINISTRATION Options and Requirements Generic Enhanced Mode Procedure 100, WordDMI Isdn84ADMINISTRATION 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 92ADMINISTRATION Options and Requirements Generic Channel Versus Trunk AssignmentsDS1 Channel Slot/Circuit 45.Procedure 012 Word 1 Name Database Generic 94ADMINISTRATION Options and Requirements GenericFrom 1 to 96ADMINISTRATION Options and Requirements Generic Character Encodes47.Procedure 012 Word 3 Name Database Generic Field Isdn Network Definition 98ADMINISTRATION Options and Requirements GenericEnhanced Mode Procedure 279, Word NETWORK-SPECIFIC Facility ParametersName Network Parameterized Feature Facility11. Network Coding Value BinaryProcedure 309 Word 1 ARS Route Tables 100ADMINISTRATION Options and Requirements GenericProcedure 309 Word 5 ARS-ISDN Bccos Enhanced Mode Procedure 309, Word102ADMINISTRATION Options and Requirements Generic Services/Network Features, for the appropriate encodeProcedure 321 Word 1 AAR Tables Generic Enhanced Mode Procedure 321, Word Procedure 321 Word 5 AAR-ISDN and Other Feature Parameters 104ADMINISTRATION Options and Requirements Generic53.Procedure 107 Word 1 Atms TTL Assignment System 85 R2V4 Procedure 108 Word 1 Isdn Trunk Group TTL Number Digits 106ADMINISTRATION Options and Requirements GenericSystem 75 R1V2 and R1V3 Service/Facility OptionsDMI-BOS? Maintenance Parameters DS1 Circuit Pack108ADMINISTRATION Options and Requirements System Compensation Value Distance Feet109 Remote SlipDetection LoopSynchronization Plan DS1 Circuit Packs112ADMINISTRATION Options and Requirements System Trunk Group/Trunk Group MembersName DelayPort ModeACA 114ADMINISTRATION Options and Requirements SystemCall AAR/ARS 60.DS1 Circuit Pack Screen, Common-Channel Signaling 116ADMINISTRATION Options and Requirements GenericLocation Line118ADINISTRATION Options and Requirements Generic Interface 120ADMINISTRATION Options and Requirements Generic STT Trunk Group/Trunk Group Members DS1 Trunk ApplicationsCall COR DTTAvd or data 122ADMINISTRATION Options and Requirements GenericBCC In/outTrunk Group ACA PBX IDProcessor Interface Data Module ISDN-PRI Applications With auto ModeNight Channel Data ExtensionPhysical Processor Channel Assignments ISDN-PRI ApplicationsLink Proc ChanAppl Chan PriorityDTE/DCE Advantages of CBC Trunking 128ADMINISTRATION Options and Requirements GenericTrunking Considerations ISDN-PRI Applications Network Facilities ISDN-PRI Applications FeatureEither a feature 0, or service NETWORK-FACILITIESCOR TAC CodingTrunk Group ISDN-PRI Trunk Applications Service Type Dial AccessService Options access, tieMax SendDisplay/TCM Message SizeSID/ANI Trunk FeaturesSID? 134ADMINISTRATION Options and Requirements Generic Application Example #2 DelApplication Example #1 SID/ANI InsertPer Call CaseApplication for Case 3 being selected Application for Case 1 being selected most restrictiveApplication for Case 2 being selected 138ADMINISTRATION Options and Requirements Generic Application for Case 4 being selectedTrunk Group Usage Allocation ISDN-PRI Applications Applications for CasesExample Screen Entries for Cases PBXAllocation 140ADMINISTRATION Options and Requirements GenericUsage PlanMin# Chan Max# Chan An Example Application for Usage Allocation PlansNumber Scheduled 142ADMINISTRATION Options and Requirements GenericFixed CBC Trunk Group Usage Allocation Plan Assignment ScheduleTrunk Group Member Assignments ISDN-PRI Trunk Applications 75.Trunk Group Screen, Page 5 ISDN-PRISID Prefix Table ISDN-PRI Applications 144ADMINISTRATION Options and Requirements GenericName Night SID PrefixAn Example Application that uses SID Ext CodeSID Prefix 146ADMINISTRATION Options and Requirements Generic Routing Patterns ISDN-PRI ApplicationsGrp No PatternNumber FRLDigits 148ADMINISTRATION Options and Requirements GenericNo. Del InsertedBand Hunt Group ISDN-PRI ApplicationsHunt Group 150ADMINISTRATION Options and Requirements GenericTerminating Extension Group ISDN-PRI Applications ACD?Terminating Extension Group 152ADMINISTRATION Options and Requirements Generic Generic 1 and Generic 2 ISDN-PRI Maintenance Philosophy Generic 2 Maintenance Capabilities and ConcernsGeneric 2 Maintenance Procedures 2MAINTENANCE and AlarmsMaintenance and Alarms 4MAINTENANCE and Alarms Summary of Generic 2 Maintenance Capabilities 6MAINTENANCE and Alarms Generic 1 Maintenance Capabilities and ConcernsGeneric 1 Maintenance Procedures Circuit Pack Alarms Summary of Generic 1 Maintenance CapabilitiesAlarms Yellow LEDLFA Alarm Facility AlarmsExcessive Misframe and CRC Errors 8MAINTENANCE and AlarmsRemote Frame Alarm Loss of Signal AlarmFraming Mode Alarm Type Conversion Blue AlarmMajor and Minor Alarms 10MAINTENANCE and AlarmsAdministration Requirements PBX ID ACA 2ADMINISTRATION RequirementsMegacom COR Administration Requirements 4ADMINISTRATION Requirements Figure A-5.Trunk Group Screen, Page 1 SDN DCS? PBX ID6ADMINISTRATION Requirements Facilities, for detailsTRANSLATIONS-BASED Problems Dacs2SAMPLE Installation and Maintenance Problems Transmission FacilitySample Installation and Maintenance Problems Trunks and Trunk Groups4SAMPLE Installation and Maintenance Problems TypeSystem CDMsCEMs DS1 or DMI6SAMPLE Installation and Maintenance Problems Sample Installation Maintenance Problems D4-Channel BanksSYNCHRONIZATION-RELATED Problems 8SAMPLE Installation and Maintenance ProblemsLoss of or No Synchronization Leavenworth LoopD4 Synchronization Problems Figure B-10.Leavenworth Loop on the Primary ReferenceSample Installation and Maintenance Problems Dacs Digital CO Synchronization Problems12SAMPLE Installation and Maintenance Problems Typical Physical Interface Connection Problems Figure B-15.Synchronization from Dacs Node14SAMPLE Installation and Maintenance Problems Initial System 85 DS1 or DMI Pinout for 50-PIN ConnectorC6C To WIRE-LUGS Installation Maintenance ProblemsCABLE/CONNECTORS Initial or OLD PDS Compatible System System Intracabinet16SAMPLE Installation and Maintenance Problems Specific Cabling Options 18SAMPLE Installation and Maintenance Problems Permitted Cabling CombinationsPermitted Cabling Combinations Using PDS Using cable GR-38020SAMPLE Installation and Maintenance Problems Permitted Cabling Combinations Using PDS 22SAMPLE Installation and Maintenance Problems Procedure 000 Word 3 Generic 2 Only VoiceMode Voice Grade Data Unknown Digital Analog Mode 3/2 2ADMINISTRATIVE Procedure SummaryAdministrative Procedure Summary Procedure 000 Word 4 System 85 R2V4 & GenericProcedure 010 Word 4 System 85 R2V4 & Generic Isdn Routing Parameters System 85 R2V4 & GenericVoice or Voice Grade Data 4ADMINISTRATIVE Procedure SummaryBC System 85 R2V4 Only Procedure 012 System 85 R2V4 & Generic Procedure 100 Word 1 System 85 R2V4 & GenericRules for Trunk Type 120 System 85 R2V4 & Generic Procedure 100 Word 2 Generic 2 Only6ADMINSTRATIVE Procedure Summary TCM Procedure 100 Word 3 System 85 R2V4 & GenericProcedure Called-Party Number IE System 85 R2V4 & Generic Procedure 107 Word 1 System 85 R2V4 & Generic8ADMINISTRATIVE Procedure Summary For international calls that is, a dial Calls For ARS callsProcedure 210 Word 2 System 85 R2V4 & Generic Procedure 108 Word 1 System 85 R2V4 & GenericProcedure 116 Word 1 System 85 R2V4 & Generic Procedure 260 Word 1 System 85 R2V4 & Generic10ADMINISTRATIVE Procedure Summary Procedure 279 Word 1 Generic 2 Only Procedure 262 Word 3 Generic 2 OnlyProcedure 275 Word 4 System 85 R2V4 & Generic Procedure 280 Word 1 Generic 2 OnlyInformation Element IE Name R2V4 12ADMINISTRATIVE Procedure SummaryIE Opcode Value Information Element IE Name Opcode ValueField 4, Isdn Trunk Type Procedure 309 Word 5 System 85 R2V4 & GenericField 5, Network Service Value Through 288 Outwats Band NSFs SDN NSF 14ADMINISTRATIVE Procedure SummaryNSF IE System 85 R2V4 Megacom NSFWats NSF Accunet via encode NSF IE GenericFields 6-10 System 85 R2V4 16ADMINISTRATIVE Procedure SummaryBC System 85 R2V4 and Generic Field 6 Generic Procedure 321 Word 5 System 85 R2V4 & GenericProcedure 354 Word 3 System 85 R2V4 & Generic Procedure 420 System 85 R2V4 & Generic 18ADMINISTRATIVE Procedure SummaryAdministrative Procedure Summary 20ADMINISTRATIVE Procedure Summary Trunk Type and Signaling Type Compatibility Tables Trunk/Signaling Cross-references2TRUNK Type and Signaling Type Compatibility Tables ApltDid Trunk Type and Signaling Type Compatibility TablesWats TIECAS MAIN/SATNDM-I ISDN/PRIEQU 6TRUNK Type and Signaling Type Compatibility TablesTrunk R2V4 G2 Equiv Type Sig. TypeTrunk Type and Signaling Type Compatibility Tables 8TRUNK Type and Signaling Type Compatibility Tables ANN11CBC Ccitt CCR Ccsa CDM CEM COR COS CRC CSU AAR F T C Afrl Aiod ALU ANI ARS Autovon AVD AWGS BC BCC Bccos bps Dacs dB AB-2ABBREVIATIONSAbbreviations AB-3 AB-4ABBREVIATIONS Megacom AccunetAdftc Afrl Aiod GL-2GLOSSARY Data transmissionTandem AWG B8ZSBit error rate Burstiness Binary serviceParameterized service format Ports, packet switching,See network channel-terminating equipment Glossary GL-5Q.931 Cross couplingUnrestricted digital data See cyclic redundancy checkDTE DS1 DMI-MOSDnis ETN GL-9EIA EpscsGRS HdlcInads Clock reference See Integrated Services Digital NetworkIsdn network- See Isdn network identifier. service value GL-12GLOSSARYStation identification number Loss of signalIsdn SID-ANI Lata LFA See loss of frame alignmentMpdm NcteNetwork primary rate interface OPS OPXDigital Network primary rate interface Glossary GL-15PCM PDM PDS PADPAM PC/PBX PRIPAM PCMSDN Robbed-bit signalingSee remote frame alarm See Remote Group See Software Defined NetworkSS7 See time-multiplexed switch Switch TMSMultiplexed switch Transport modeZCS Zero code Equal 7-43,7-47,7-101,7-103ISDN Network 7-84,7-88nodal servicesAccunet 6-3,C-16code AdftcBccos 1-24,C-1 AVD 1-22,7-9BC 1-22,C-16 BC code 7-23,7-81 Violation 1-18,1-20,3-39bank D4 1-1,2-5D-type1-1 CcittCEM 9deltaDCE 1-21,7-127D-channel COR 7-112,7-125,A-2CRC 1-12,1-14CRV CSU xix, 1-20,3-2customer I -Contd BOS-Contd NPA-NXX7-28,7-72BOS Index IN-5DTE 2-18 IN-6 IndexDS1- Contd EIAIndex IN-7 D4 1-10,2-5,2-7FXS LEC IN-8 IndexLapd 1-3,7-17LATA 2-7layer 1 1-3layer 2 CDM Misframe 1-11,1-14MOVoice 1-23,7-33voice-grade data 1-23,1-24ZCS Index IN-9NPA-NNX C-17 IN-10 IndexNcte PCM 1-8,5-1PCM data OPSPorts 4-7,6-6 Channel1-5,1-9,7-57facility 7-11,7-59RNX 1-27robbed-bit signaling Index IN-13 SS7 7-30,7-889sources TMS IN-14 IndexCEM 2-10terminating Members 7-35,7-92Generic 1 CO 2-8,7-13combination tie 2-5,6-4DID 6-11,7-13FX 2-8,7-13ground-start CO 6-11group 108IN-16 Index