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Cisco Systems manual 26Cisco BPX 8600 Series Reference

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Cisco Systems manual 26Cisco BPX 8600 Series Reference

Contents

Cisco BPX 8600 Series Reference Release MayPage Page Page About This Manual Chapter IntroductionBPX Switch Common Core Chapter General DescriptionChapter Service Interface Line Cards Chapter Network Interface Trunk CardsSimba BXM T3/E3, 155,Chapter ATM Connections Chapter Tag Switching Chapter ATM and Frame Relay SVCs SPVCsChapter BME Multicasting Chapter Repair and Replacement 11-1 Chapter Frame Relay to ATM Network Service Interworking 12-1 Chapter Tiered Networks 13-1Chapter BPX Snmp Agent 14-1 Appendix C BPX Switch Peripherals Appendix a BPX Node SpecificationsAppendix B BPX Switch Cabling Summary Appendix D AT3-6ME Interface Adapter Appendix E Glossary IndexF I G U R E S Xviii Cisco BPX 8600 Series Reference List of Figures Dial-Modem Cabling for Auto Answer Dial-In to BPX T a B L E S Table A-1 Table B-1Table B-2 Table B-3Table C-1 Table C-2Table C-3 Table C-4Xxiv Cisco BPX 8600 Series Reference Cisco WAN Switching Product Name Change About This ManualObjectives AudienceOrganization Chapter Tag Switching Chapter Repair and ReplacementChapter Frame Relay to ATM Network and Service Interworking Appendix a BPX Node SpecificationsRelated Documentation Related DocumentationConventions Conventions Xxx Cisco BPX 8600 Series Reference BPX Capabilities IntroductionGeneral Description Extended Services Processor General Description BPX Switch General Configuration ExampleContinuing Features with Release BPX SwitchMGX IGX Switch New with ReleaseContinuing Features with Release NetworkIMATM-B BPX Switch Operation Access ProductsBPX Switch Operation BPX Switch OperationBPX Switch with MGX 8220 Shelves Tag SwitchingBPX Switch with Extended Services Processor Frame Relay to ATM InterworkingFrame Relay to ATM Network Interworking Additional Information Service InterworkingTiered Networks Routing Hubs and Interface Shelves BPX Switch Routing Hubs Tiered Network with BPX Switch and IGX Switch Routing Hubs Inverse Multiplexing ATMVirtual Trunking Virtual Trunking ExampleTraffic and Congestion Management Traffic and Congestion ManagementFairShare Cost-Based AutoRoute OptiClassAutoRoute Congestion Management, VS/VD Congestion Management, ForeSightNetwork Management Network ManagementNetwork Interfaces Node Synchronization Service InterfacesStatistical Alarms and Network Statistics Connections and Connection Routing Switch Software DescriptionSwitch Software Description Connection Routing Groups Major Features of Cost-Based AutoRoute Cost-Based Connection Routing22Cisco BPX 8600 Series Reference Network Synchronization Cost-Based AutoRoute CommandsNetwork Synchronization Switch Availability Node AlarmsSwitch Availability Node RedundancySwitch Availability 26Cisco BPX 8600 Series Reference Physical Description BPX Switch EnclosureGeneral Description BPX Switch Exterior Front View Physical DescriptionNode DC Powering Node CoolingOptional AC Power Supply Assembly DC Power Entry Module Shown with Conduit Box RemovedCard Shelf Configuration AC Power Supply Assembly Front ViewBPX Switch Card Shelf Front View Functional Description Physical LayerATM Layer Functional DescriptionATM Cell Headers ATM Cell FormatFunctional Description UNI Header NNI HeaderSTI Header Functional Description STI HeaderATM Cell Addressing ATM Adaptation LayerAAL SmdsIPX and IGX Switch Trunk Interfaces to ATM 11 SAR Adaptation ProcessBAM FastPacket Adaptation to ATM STICAM UNI SAM UNISimple and Complex Gateway Formats Simple GatewayComplex Gateway, Frame Relay to ATM Network Interworking BPX Switch Plug-In Card Summary Card Name Where BPX Switch Major GroupsBPX Switch Major Groups BME SmfxlrLM-2OC3-SMF LM-2OC3-SMFLROptional Peripherals Optional PeripheralsBPX Switch Common Core BPX Switch Common Core GroupBroadband Controller Card BCC-32, BCC-3, BCC-4 Common Core Group Block DiagramBroadband Controller Card BCC-32, BCC-3, BCC-4 Features Functional Description BCC-32 and BCC-3 Block Diagram BCC Front Panel Indicators Indicator FunctionFront Panel Description LANCard BCC Front PanelGbps Operation with the BCC-4 Back Cards for the BCC-3 and BCC-32Enter y StepBackcard Line Module for BCC-32, Connectors Connector FunctionEXT 1 TMG EXT 2 TMGBCC-3-bc or BCC-c Face Plate Connectors Alarm/Status Monitor Card Alarm/Status Monitor CardASM Front Panel Controls and Indicators Controls Indicator FunctionStatus ACOConnector Indicator Function Line Module for the Alarm/Status Monitor CardLM-ASM Face Plate Connectors LMI-ASM Face Plate BPX Switch StrataBus 9.6 and 19.2 Gbps Backplanes BPX Switch StrataBus 9.6 and 19.2 Gbps Backplanes18Cisco BPX 8600 Series Reference Network Interface Trunk Cards BPX Switch Network Interface GroupBXM Cards, Trunk Mode Summary Broadband Network Interface Cards BNI-T3 and BNI-E3 Broadband Network Interface Cards BNI-T3 and BNI-E3Egress Simplified BNI-T3, BNI-E3 Block Diagram IngressBandwidth Control Front Panel Indicators Loopbacks and DiagnosticsBNI Front Panel Status Indicators Status LED color Status DescriptionStatus port LM-3T3 and LM-3E3 Connectors T3 and E3 Line Modules LM-3T3 and LM-3E3Port 1 RX TX Port 2 RX TXT3 and E3 Line Modules LM-3T3 and LM-3E3 LM-3T3 Face Plate, TypicalLM-3E3 Face Plate, Typica Broadband Network Interface Cards, BNI-155 OverviewEgress IngressCBR VBR Simplified BNI-155 Block Diagram Act Stby Fail Failure Description 7BNI-155 Front Panel LM-OC3-SMF and LM-OC3-SMFLR Connectors Function LM-OC3-MMF Connectors FunctionOC3, Line Modules SMF, SMFLR, & MMF OC3, Line Modules SMF, SMFLR, & MMFLM-2OC3-SMF Face Plate LM-2OC3-MMF Face Plate Cabling of BNI Backcard, SMF-2-BC Cabling of BNI Backcard, SMF-2-BC20Cisco BPX 8600 Series Reference BXM Cards, Port UNI Mode Summary Service Interface Line CardsBPX Switch Service Interface Group Summary ASI-1, ATM Service Interface Card ASI-1, ATM Service Interface CardEgress Configuring Connections ATM over ASI Example Monitoring Statistics 6Cisco BPX 8600 Series Reference ASI-1 Front Panel LM-2T3 Module LM-2T3 ModuleLine Module, ASI, 2T3 LM-2E3 Module LM-2E3 ModuleLine Module, ASI, 2E3 ASI-155, ATM Service Interface Card ASI-155, ATM Service Interface CardConfiguring Connections ASI-155 Simplified Block Diagram Service Interface Line Cards ASI-155 Front Panel BXM Cards, Access UNI Mode ASI-155 Line Module, LM-2OC3-SMFASI-155 Line Module, LM-2OC3-SMFLR ASI-155 Line Module, LM-2OC3-MMFBXM Cards, Access UNI Mode Tag Switching BXM T3/E3, 155,Dynamic Resource Partitioning for SPVCs Dynamic Resource Partitioning for SPVCsBXM Cards BXM Cards T3/E3 45 Mbps/34Mbps OC3/STM-1 155.52 MbpsOC12/STM-4 622.08 Mbps BPX-T3/E3-BCFeatures BXM CapabilitiesT3/E3 45 Mbps/34 Mbps OC3/STM-1 155.520 MbpsATM Layer BXM CapabilitiesService Types CBR ServiceVBR Service ABR ServiceBXM Front Card Indicators BXM Front Panel Status IndicatorsBXM Front Panel Card Failure indicators Card OperationCard BXM-155 Front Panel, Eight-Port Card Shown BXM-T3/E3 Front Panel, 12-Port Card Shown BXM, Backcard Connectors BXM-622 BackcardsBXM-155 Backcards BXM-T3/E3 BackcardsSMF-622-2, SMFLR-622-2, and SMFXLR-622-2 Back Card BXM-155-8 Port Backcard, MMF, SMF, or Smflr BPX-T3/E3 Back Card, 12-Port Option Shown Cabling of SMF-622 Series Backcards Y-Cabling of SMF-622 Series BackcardsBXM Functional Description Overview, Port UNI ModeBXM Functional Description BXM Port Access UNI Ingress Operation 10 BXM Port Access, UNI Egress Operation Overview, Trunk Mode BXM Trunk Ingress OperationBXM Trunk Egress Operation Detailed Description, Port UNI and Trunk Modes DeMux/MuxIngress and Egress Queue Engines ACP Subsystem ProcessorFault Management and Statistics Fault Management and Statistics, Port UNI ModeAlarms Performance MonitoringFault Management and Statistics, Trunk Mode Technical Specifications Technical SpecificationsPhysical Layer General InformationGeneral Sonet Notes General Sonet NotesSonet Section, Line, and Path Descriptions Unit DescriptionUser Commands DiagnosticsConnection Provisioning TestConfiguring Connections Configuration ManagementConfiguring Connections SyntaxConfiguring Connections Field Value Description Command Line Interface Examples Command Line Interface ExamplesAn example of the addtrk command follows An example of the cnfln command follows An example of the cnfportq command follows An example of the upport command follows An example of the cnfcls command for class 2 follows YourID1 BPX Jan 1998 0241 GMT An example of the cnfabrparm command follows An example of the dsplns command follows 40Cisco BPX 8600 Series Reference Resource Partitioning Dynamic Resource Partitioning for SPVCsSummary Resource PartitioningASI SVC Resource Partitioning Shown in the following example Example ASI cnfportq Command Example BXM cnfport Command BXM SVC Resource PartitioningNNI Trunk SVC Resource Partitioning BNI Trunk SVC Resource Partitioning TS,NTS,FR,FST,CBR,VBR,ABRExample BNI cnftrkparm Command BXM Trunk SVC Resource PartitioningExample BXM cnftrk Command ATM Connection Services ATM ConnectionsSVCs SVCsTraffic Management Overview Traffic ParametersQoS Parameters Other AttributesBXM Connections Standard ABR notesVsvd Description ATM Connection Requirements ATM Connection RequirementsForeSight Congestion Control Field Value Description Addcon Command SyntaxConnection Routing ATM Connection Configuration ATM Connection ConfigurationCLP0+1 SCR FlowDefault Setting OC12 Range ASI T3/E3 Range ASI-155 Range BXM T3/E3, OC3RDF ICRRIF PCR CdvtVsvd SCRIBS CBR Connections CBR Policing Definitions ATM Forum TM Spec PCR FlowVBR and Atfr Connections VBR ConnectionsAtfr Connections Atfr Connection Prompt Sequence ABR Connections ABR NotesABR and Atfst Connections ABR Standard Connection Prompt Sequence Meaning of Vsvd and Flow Control External Segments Atfst Connections ABR ForeSight Connection Prompt SequenceAtfst Connection Prompt Sequence UBR Connections UBR Policing Definitions ATM Forum TM Spec PCR FlowTraffic Policing Examples Dual-Leaky Bucket An AnalogyCBR Traffic Policing Examples Traffic Policing Examples11 CBR Connection, UPC Overview LP=1 12 CBR.1 Connection with Bucket CompliantVBR Dual-Leaky Bucket Policing Examples VBR.114 VBR Connection, UPC Overview Leaky Bucket Examples 15 VBR Connection, Policing = 4, Leaky Bucket 1 CompliantCLP=0 VBR.2 LP=0 18 VBR.2 Connection, Leaky Bucket 2 Discarding CLP 0 CellsVBR.1 VBR.3 ABR Connection Policing UBR Connection Policing21 UBR Connection, UPC Overview Traffic Shaping for CBR, VBR, and UBR ConfigurationTraffic Shaping for CBR, VBR, and UBR LMI and Ilmi Parameters Traffic Shaping RatesATM and Frame Relay SVCs, and SPVCs ATM and Frame Relay SVCs and SPVCsPVCs and SVCs PVCsSPVCs ATM and Frame Relay SVCs and SPVCsSVCs BPX Switch and ESP Interfaces BPX Switch and ESP InterfacesInterim Inter-switch Protocol Routing Signaling Plane Signaling PlaneUNI Signaling Channel NNI Signaling Channel UNI Signaling ChannelsNetwork Interworking Between Frame Relay and ATM Network Interworking Between Frame Relay and ATMESP Interfaces Extended Services ProcessorExtended Services Processor Stand-Alone ESP Redundant ESPsCable Redundancy ESP Y-Cable RedundancyOther Redundancy Options Resource Partitioning Tag Switching IntroductionTag Switching Benefits Tag Switching BenefitsTag Switching Overview Elements in a Tag Switching Network Tag Switching Operation at LayerElements in a Tag Switching Network ForwardingControl Tag Switching in an ATM WANTag Switching in an ATM WAN Tag Forwarding Information Base Tfib in an ATM Environment Downstream on Demand Tag Allocation, Conservative Mode Shown Tag Switching and the BPX Tag Switching and the BPXBPX Tag Switching Virtual Switch Interfaces BPX Switch VSI InterfacesConnection Setup, End Points on same VSI Slave Tag Switching Resource Configuration Parameters Tag Switching Resource Configuration ParametersConfiguring VSI Lcns Useful Default Allocations Details of More Rigorous Allocations Port VSI Partition LCN Allocation ElementsRequirements RequirementsList of Terms Related Documents Configuration ManagementRelated Documents Configuration Criteria Cnfqbin CommandCnfrsrc Command Configuration CriteriaCnfrsrc Parameter Summary Example Parameter cnfrsrc Value DescriptionConfiguration Example Resetcd 4 hConfiguration Example DspcdsStatus Active Revision CD18 Max PVC bandwidth Partition Enabled e VSI min LCNs Uptrk 4.1 uptrk 4.2 uptrkCnfrsrc VSI start VPI VSI end VPI VSI min b/w VSI max b/w22Cisco BPX 8600 Series Reference Cnfqbin 4.1 10 e 0 65536 95 100 Cnfqbin 4.1 Enable/disable eDspqbin 4.1 Addshelf 4.1 vsi 1 Tsc# show controllers VSI descriptor Checking and TroubleshootingChecking and Troubleshooting Dsptrks DspnodeDsprsrc 4.1 Tsc# sho tag tdp disc Tsc# show tag intTsc# reload Provisioning and Managing Connections Provisioning and Managing ConnectionsStatistics Command Reference BPX Switch CommandsTSC Commands Command ReferenceRelated Commands AddshelfSyntax AttributesDescription for Tag Switching Example for Tag SwitchingAddshelf 11.1 a Description for Interface ShelvesExample for Interface Shelves Related Commands dspqbin Parameters-cnfqbin BPX switchCnfqbin ExampleDescription Cnfqbin 4.1 10 e 0 65536 95 100Parameter cnfrsrc Description Related Commands Parameters-cnfrsrcCnfrsrc Cnfrsrc Parameter cnfrsrc Description Here, ax = 256, n1x = 512, and m1x = 10 Port VSI Partition LCN Allocation Elements Example 1, 8-Port OC3 BXM Configured in Trunk Mode Cnfrsrc Port N1x Unallocated Min z1 + n1x, max M1x LCNs Total Lcns available toPort VSI Partition = Example 2, 8-Port OC3 BXM Configured in Port Mode 44Cisco BPX 8600 Series Reference 120 3000 3500 4907 7588 100 IPX switch, IGX switch, BPX switch DspcdParameters-dspcd DspcdDspcds Parameters-dspcdsSyntax dspcds l Example dspcds DspcdsKDJ Dspnode BPX switch, IGX switch YesDspnode 50Cisco BPX 8600 Series Reference Related Commands cnfqbin Parameters-dspqbin DspqbinExample dspqbin 4.1 DspqbinExample dspqbin 4.1 10 Sample Display Related Commands cnfrsrc Parameters-dspcds DsprsrcExample dsprsrc 4.1 DsprsrcDsptrks DsptrksExample Resetcd Example resetcd 5 HYes IPX switch, IGX switch, BPX switch ResetcdYes BPX switch UpportExample upport UpportSystem Response Uptrk Parameters-uptrkOptional Parameters-uptrk Example uptrkUptrk BME Multicasting BME Features StandardsMulticasting Benefits Multicasting OverviewConnection Management Criteria Connection Management with Cisco StrataView PlusBME Restrictions Address CriteriaBME Operation BME OperationBME Cell Replication Group Action Command Cell Replication StatsAdding Connections GroupMulti-Segment Multicast Connections Multicast StatisticsAlarms AlarmsPolicing OAM cellsAIS cells Hot Standby BackupHot Standby Backup Configuration ConfigurationConnection Diagnostics Configuration Management Repair and Replacement Preventive MaintenanceTroubleshooting the BPX Switch General Troubleshooting ProceduresTroubleshooting the BPX Switch Troubleshooting the BPX Switch Symptom Probable Cause RemedySymptom Probable Cause Remedy Card Status for the BPX Switch Displaying the Status of Cards in the NodeCard Type Status Description BCCReplacing a Front Card Replacing PartsReplacing Parts Replacing Parts Step Top of the grille should pop outReplacing a Line Module Unlatching the Air Intake Grille11-8Cisco BPX 8600 Series Reference Replacing a DC Power Entry Module Removing a Line ModuleDC Power Entry Module with Conduit Box Replacing an AC Power Supply AC Power Supply AssemblyField-Installing a Second AC Power Supply Removing Blank Filler Panel B side shownReplacing the Fan Assembly Replacing the Temperature Sensing Unit Replacing Card Slot and Fan Fuses on the System BackplaneCard Slot and Fan Fuse Locations on System Backplane 11-16Cisco BPX 8600 Series Reference Frame Relay to ATM Network and Service Interworking Frame Relay to ATM Network and Service Interworking12-2Cisco BPX 8600 Series Reference Service Interworking Networking Interworking Networking InterworkingMUX FRP BUS AIT BNI ATF Connections, Simplified Example ATM Layers ATM Protocol StackATM Protocol Stack AIT/BTM Interworking and the ATM Protocol Stack AIT/BTM Interworking and the ATM Protocol StackProtocol Stack Operation AIT/BTM Control Mapping, Frames and Cells Features Management, OAM CellsATF Summary LimitationsSome ATF Connection Criteria Connection ManagementPort Management Addcon Cnfcls Cnfcon Delcon Dspcls Dspcon DspconsChannel Statistics StructureCnfport Cnfportq Clrchstats Cnfchstats Dspchstats Dspchstatcnf DspchstathistDspalms Dspcon Dspport Tstconseg Tstdly DiagnosticsOAM Cell Support Virtual Circuit Features User CommandsManagement AUser CommandsManagement User Interface RoutingBandwidth Management Signaling AlarmsBPX and IGX Routing Hubs Tiered NetworksRouting Hubs and Interface Shelves Routing Hubs and Interface Shelves Tiered Network with BPX and IGX Routing HubsBPX Routing Hubs in a Tiered Network BPX Routing Hubs in a Tiered NetworkTiered Network Implementation Definitions UpgradesGeneral Co-locating Routing Hubs and Interface Shelves Network ManagementIPX Interface Shelf Description ForeSightPreferred Routing Local and Remote LoopbacksInterface Shelf Management Configuration and ManagementAlarm Management of Interface Shelf on the BPX Hub Node Alarm Management on the IPX Interface Shelf Port ManagementConnection Management Bandwidth ManagementIGX Routing Hubs in a Tiered Network IGX Routing Hubs in a Tiered NetworkIGX Shelves and Routing Hubs, Frame Relay Connections General Co-locating Routing Hubs and Shelves IGX Interface Shelf Description Shelf Management User Interface Commands Alarm Management of Interface Shelf on the IGX Hub NodeAlarm Management on the IGX Interface Shelf ShelfData Connection Commands Data Channel CommandsVoice Connection Commands Voice Channel CommandsCisco StrataView Plus NMS Cisco StrataView Plus NMS13-18Cisco BPX 8600 Series Reference BPX Snmp Agent Snmp Overview1shows an Snmp manager and the nodes within a domain Snmp OverviewSnmp Functions Snmp FunctionsResponses to Get Get-Next Requests ATM Set RequestsMIB II Support MIB II SupportResponses to Set Requests Cisco WAN Switching Proprietary MIB Structure Switch Service ObjectsSwitch Connections Cisco WAN Switching Proprietary MIB StructureEndpoint Mapping Bandwidth ClassEndpoint Statistics 14-8Cisco BPX 8600 Series Reference BPX Node Specifications GeneralGeneral Characteristic T3 DS3 ATM Trunk Interface BXM-T3/E3 CardsATM Trunk Interface BXM-155 Cards ATM Trunk Interface BXM-T3/E3 CardsSMF LR ~40 KM ATM Trunk Interface BXM-155 CardsSMF IR TX SMF IR RX SMF LR TX SMF LR RX ATM Trunk Interface BXM-622 CardsATM Trunk Interface BXM-622 Cards ATM T3 Trunk Interface BNI-T3, LM-3T3 ATM T3 Trunk Interface BNI-T3, LM-3T3ATM E3 Trunk Interface BNI-E3, LM-3E3 ATM E3 Trunk Interface BNI-E3, LM-3E3ATM OC3 Trunk Interface BNI-OC3, LM-OC3 ATM OC3 Trunk Interface BNI-OC3, LM-OC3ATM Service Interface BXM-T3/E3 Cards ATM Service Interface BXM-155 CardsATM Service Interface BXM-622 Cards ATM Service Interface BXM-T3/E3 CardsATM Service Interface ASI-1, LM-2T3 ATM Service Interface ASI-1, LM-2T3ATM Service Interface ASI-1, LM-2E3 ATM Service Interface ASI-2, LM-OC3 ATM Service Interface ASI-2, LM-OC312Cisco BPX 8600 Series Reference BPX Switch Cabling Summary Power CablingAC Powered Nodes Trunk CablingDC Powered Nodes Table B-3 DC Power Wiring Cable Parameter DescriptionLM-BCC Cabling Auxiliary and Control Port CablingLAN Port Cabling Modem CablingTable B-6 LAN Port Cabling Cable Parameter Description Table B-7 LAN Port Pin Assignments Pin # NameLM-BCC Cabling External Clock Input CablingT1 Clock Cabling E1 Clock Cabling Table B-12through Table B-15lists E1 clock cabling detailsExternal Alarm Cabling Standard BPX Switch CablesExternal Alarm Cabling Table B-17 Network Alarm Pin Assignments DescriptionLM-BCC TBS Redundancy Y CableTable B-19 Redundancy Y-Cables Used On Cisco P/N Redundancy Y Cable BPX Switch Peripherals Cisco StrataView Plus Terminal Control Port, Local ControlPrinter DIP Switch Settings for OkidataTable C-3 Switch a Settings-Okidata 184 Printer Description Printer Table C-4 Switch 1 Settings-Okidata 184 Printer DescriptionTable C-5 Switch 2 Settings-Okidata 184 Printer Description Motorola V.34R BPX Switch Dial-In Configuration BPX Switch Auto-Answer Dial-In to BPX switchModems, Dial-In and Dial-Out Modems, Dial-In and Dial-OutATL1 ATSØ=1AT\N3 AT%CIPX Auto-Dial to Customer Service AT\T3 AT\JAT\Q1 8Cisco BPX 8600 Series Reference AT3-6ME Interface Adapter ApplicationEquipment Description Interface ConnectorsEquipment Description Table D-1 Rear Panel Connectors Type Description T3 RX BNCT3 TX BNC DB9FT2 DIP SwitchesTable D-2 Front Panel Indicators Color Description Front and Rear Panel FT2Installation AT3-6ME ConfigurationInstallation Table D-3 DIP Switch SW-1 Selection Guide Position FunctionOperation BPX, IGX, or IPX Port ConfigurationPower-Up Sequence Normal Operation Remote Loop OperationTerminal Operation OperationTable D-7 Command Summary Parameters Meaning CommandsTable D-6 DIP Switch Settings Specifications Specifications Table D-8 Status DisplayT3 interface BPV NNNPower SpecificationsT2 Interface Mechanical12Cisco BPX 8600 Series Reference Glossary ARC Alarm Relay Card ARI Alarm Relay Interface CardARM Alarm Relay Module ASM Alarm/Status Monitor CardsB8ZS Bipolar with Eight Zero Suppression Bandwidth reservationChannel BC-E1 Backcard E1BPX Switch CAS Channel Associated SignallingCcdv Compliant Cell Delay Variation CCS Common Channel SignallingCGA Carrier Group Alarm CellCell relay Circuit lineCOS Class of Service Crosspoint switchCSU Channel Service Unit Dacs Digital Access and Control SystemDDS Digital Data Service Dial Access SwitchingDS0 Digital Signal DS1 Digital SignalDSI Digital Speech Interpolation DTE Data Terminal EquipmentECN Explicit Congestion Notification Fast EIAFrame Relay Service Frame forwardingFPC FastPAD Back Card Frame relay connection classIGX Switch FTC FastPAD Trunk CardFTM FastPAD Trunk Module GatewayIPX Switch Isdn Integrated Services Digital NetworkJunction node Junction trunkLocal alarm Major alarmMinor alarm Local addressingPacket switching NPC Network Processor CardNPM Network Processor Module NrmPartially-interleaved EIA PBX private branch exchangePCM Pulse Code Modulation PCR Peak Cell RateRed alarm Remote alarmRobbed bit signaling 921/Q.931SAR Segmentation and Reassembly RS-449SCC System Clock Card SCM System Clock ModuleSVC switched virtual circuit Speech detectionSplit clock Status EnquiryTimestamp TrmTrunk Trunk conditioningVoice Network Switching VAD Voice Activity DetectionVBR Variable Bit Rate Virtual circuitCable redundancy Yellow alarmCables ABR STD AdtfASI ATMDlci ESPFbtc FRF.4 FrttPnni SAMSnmp SpvcTftp TSRVCI VPIDocumentation Response Card Strongly agree Strongly disagreeBusiness Reply Mail