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Cisco Systems manual 12Cisco BPX 8600 Series Reference

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Cisco Systems manual 12Cisco BPX 8600 Series Reference

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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 B-2 Table A-1Table B-1 Table B-3Table C-3 Table C-1Table C-2 Table C-4Xxiv Cisco BPX 8600 Series Reference Objectives Cisco WAN Switching Product Name ChangeAbout This Manual AudienceOrganization Chapter Frame Relay to ATM Network and Service Interworking Chapter Tag SwitchingChapter Repair and Replacement 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 ExampleMGX IGX Switch Continuing Features with ReleaseBPX Switch New with ReleaseContinuing Features with Release NetworkIMATM-B BPX Switch Operation BPX Switch OperationAccess Products BPX Switch OperationBPX Switch with Extended Services Processor BPX Switch with MGX 8220 ShelvesTag Switching 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 Switch AvailabilityNode Alarms 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 ATM Layer Functional DescriptionPhysical Layer Functional DescriptionATM Cell Headers ATM Cell FormatFunctional Description UNI Header NNI HeaderSTI Header Functional Description STI HeaderAAL ATM Cell AddressingATM Adaptation Layer SmdsIPX and IGX Switch Trunk Interfaces to ATM 11 SAR Adaptation ProcessBAM CAM UNI FastPacket Adaptation to ATMSTI 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 LM-2OC3-SMF BMESmfxlr 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 Front Panel Description BCC Front Panel IndicatorsIndicator Function LANCard BCC Front PanelEnter y Gbps Operation with the BCC-4Back Cards for the BCC-3 and BCC-32 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 BNI Front Panel Status Indicators Front Panel IndicatorsLoopbacks and Diagnostics Status LED color Status DescriptionStatus port Port 1 RX TX LM-3T3 and LM-3E3 ConnectorsT3 and E3 Line Modules LM-3T3 and LM-3E3 Port 2 RX TXT3 and E3 Line Modules LM-3T3 and LM-3E3 LM-3T3 Face Plate, TypicalLM-3E3 Face Plate, Typica Egress Broadband Network Interface Cards, BNI-155Overview IngressCBR VBR Simplified BNI-155 Block Diagram Act Stby Fail Failure Description 7BNI-155 Front Panel OC3, Line Modules SMF, SMFLR, & MMF LM-OC3-SMF and LM-OC3-SMFLR Connectors FunctionLM-OC3-MMF Connectors Function 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 ASI-155 Line Module, LM-2OC3-SMFLR BXM Cards, Access UNI ModeASI-155 Line Module, LM-2OC3-SMF 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 OC12/STM-4 622.08 Mbps T3/E3 45 Mbps/34MbpsOC3/STM-1 155.52 Mbps BPX-T3/E3-BCT3/E3 45 Mbps/34 Mbps FeaturesBXM Capabilities OC3/STM-1 155.520 MbpsATM Layer BXM CapabilitiesVBR Service Service TypesCBR Service ABR ServiceBXM Front Panel Card Failure indicators BXM Front Card IndicatorsBXM Front Panel Status Indicators Card OperationCard BXM-155 Front Panel, Eight-Port Card Shown BXM-T3/E3 Front Panel, 12-Port Card Shown BXM-155 Backcards BXM, Backcard ConnectorsBXM-622 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 ProcessorAlarms Fault Management and StatisticsFault Management and Statistics, Port UNI Mode Performance MonitoringFault Management and Statistics, Trunk Mode Physical Layer Technical SpecificationsTechnical Specifications General InformationSonet Section, Line, and Path Descriptions General Sonet NotesGeneral Sonet Notes Unit DescriptionConnection Provisioning User CommandsDiagnostics TestConfiguring Connections Configuring ConnectionsConfiguration Management 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 Summary Resource PartitioningDynamic Resource Partitioning for SPVCs 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 SVCsQoS Parameters Traffic Management OverviewTraffic 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 Vsvd PCRCdvt 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 FlowCBR Traffic Policing Examples Traffic Policing ExamplesDual-Leaky Bucket An Analogy 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 SPVCsSPVCs PVCs and SVCsPVCs 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 Elements in a Tag Switching NetworkTag Switching Operation at Layer 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 Cnfrsrc Command Configuration CriteriaCnfqbin Command Configuration CriteriaCnfrsrc Parameter Summary Example Parameter cnfrsrc Value DescriptionConfiguration Example Configuration ExampleResetcd 4 h DspcdsStatus Active Revision CD18 Cnfrsrc Max PVC bandwidth Partition Enabled e VSI min LCNsUptrk 4.1 uptrk 4.2 uptrk 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 TSC Commands Command ReferenceBPX Switch Commands Command ReferenceSyntax Related CommandsAddshelf AttributesDescription for Tag Switching Example for Tag SwitchingAddshelf 11.1 a Description for Interface ShelvesExample for Interface Shelves Cnfqbin Related Commands dspqbin Parameters-cnfqbinBPX switch 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 Parameters-dspcd IPX switch, IGX switch, BPX switchDspcd DspcdSyntax dspcds l Example dspcds DspcdsParameters-dspcds DspcdsKDJ Dspnode BPX switch, IGX switch YesDspnode 50Cisco BPX 8600 Series Reference Example dspqbin 4.1 Related Commands cnfqbin Parameters-dspqbinDspqbin DspqbinExample dspqbin 4.1 10 Sample Display Example dsprsrc 4.1 Related Commands cnfrsrc Parameters-dspcdsDsprsrc DsprsrcDsptrks DsptrksExample Yes IPX switch, IGX switch, BPX switch ResetcdExample resetcd 5 H ResetcdExample upport Yes BPX switchUpport UpportSystem Response Optional Parameters-uptrk UptrkParameters-uptrk Example uptrkUptrk BME Multicasting Multicasting Benefits BME FeaturesStandards Multicasting OverviewBME Restrictions Connection Management CriteriaConnection Management with Cisco StrataView Plus Address CriteriaBME Operation BME OperationBME Cell Replication Adding Connections Group Action CommandCell Replication Stats GroupMulti-Segment Multicast Connections Multicast StatisticsPolicing AlarmsAlarms OAM cellsAIS cells Hot Standby BackupHot Standby Backup Configuration ConfigurationConnection Diagnostics Configuration Management Troubleshooting the BPX Switch Repair and ReplacementPreventive Maintenance General Troubleshooting ProceduresTroubleshooting the BPX Switch Troubleshooting the BPX Switch Symptom Probable Cause RemedySymptom Probable Cause Remedy Card Type Status Description Card Status for the BPX SwitchDisplaying the Status of Cards in the Node 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 ATF Summary FeaturesManagement, OAM Cells LimitationsPort Management Some ATF Connection CriteriaConnection Management Addcon Cnfcls Cnfcon Delcon Dspcls Dspcon DspconsCnfport Cnfportq Channel StatisticsStructure 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 ManagementPreferred Routing IPX Interface Shelf DescriptionForeSight Local and Remote LoopbacksInterface Shelf Management Configuration and ManagementAlarm Management of Interface Shelf on the BPX Hub Node Connection Management Alarm Management on the IPX Interface ShelfPort 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 Alarm Management on the IGX Interface Shelf User Interface CommandsAlarm Management of Interface Shelf on the IGX Hub Node ShelfVoice Connection Commands Data Connection CommandsData Channel 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 Switch Connections Cisco WAN Switching Proprietary MIB StructureSwitch Service Objects Cisco WAN Switching Proprietary MIB StructureEndpoint Mapping Bandwidth ClassEndpoint Statistics 14-8Cisco BPX 8600 Series Reference BPX Node Specifications GeneralGeneral ATM Trunk Interface BXM-155 Cards Characteristic T3 DS3ATM Trunk Interface BXM-T3/E3 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-622 Cards ATM Service Interface BXM-T3/E3 CardsATM Service Interface BXM-155 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 AC Powered Nodes BPX Switch Cabling SummaryPower Cabling Trunk CablingLM-BCC Cabling DC Powered NodesTable B-3 DC Power Wiring Cable Parameter Description Auxiliary and Control Port CablingTable B-6 LAN Port Cabling Cable Parameter Description LAN Port CablingModem Cabling 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 External Alarm CablingStandard BPX Switch Cables 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 Modems, Dial-In and Dial-Out Motorola V.34R BPX Switch Dial-In ConfigurationBPX Switch Auto-Answer Dial-In to BPX switch Modems, Dial-In and Dial-OutAT\N3 ATL1ATSØ=1 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 T3 TX BNC Table D-1 Rear Panel Connectors Type DescriptionT3 RX BNC DB9FT2 DIP SwitchesTable D-2 Front Panel Indicators Color Description Front and Rear Panel FT2Installation InstallationAT3-6ME Configuration Table D-3 DIP Switch SW-1 Selection Guide Position FunctionOperation BPX, IGX, or IPX Port ConfigurationPower-Up Sequence Terminal Operation Normal OperationRemote Loop Operation OperationTable D-7 Command Summary Parameters Meaning CommandsTable D-6 DIP Switch Settings T3 interface SpecificationsSpecifications Table D-8 Status Display BPV NNNT2 Interface PowerSpecifications Mechanical12Cisco BPX 8600 Series Reference Glossary ARM Alarm Relay Module ARC Alarm Relay CardARI Alarm Relay Interface Card ASM Alarm/Status Monitor CardsChannel B8ZS Bipolar with Eight Zero SuppressionBandwidth reservation BC-E1 Backcard E1Ccdv Compliant Cell Delay Variation BPX SwitchCAS Channel Associated Signalling CCS Common Channel SignallingCell relay CGA Carrier Group AlarmCell Circuit lineCSU Channel Service Unit COS Class of ServiceCrosspoint switch Dacs Digital Access and Control SystemDS0 Digital Signal DDS Digital Data ServiceDial Access Switching DS1 Digital SignalECN Explicit Congestion Notification DSI Digital Speech InterpolationDTE Data Terminal Equipment Fast EIAFPC FastPAD Back Card Frame Relay ServiceFrame forwarding Frame relay connection classFTM FastPAD Trunk Module IGX SwitchFTC FastPAD Trunk Card GatewayJunction node IPX SwitchIsdn Integrated Services Digital Network Junction trunkMinor alarm Local alarmMajor alarm Local addressingNPM Network Processor Module Packet switchingNPC Network Processor Card NrmPCM Pulse Code Modulation Partially-interleaved EIAPBX private branch exchange PCR Peak Cell RateRobbed bit signaling Red alarmRemote alarm 921/Q.931SCC System Clock Card SAR Segmentation and ReassemblyRS-449 SCM System Clock ModuleSplit clock SVC switched virtual circuitSpeech detection Status EnquiryTrunk TimestampTrm Trunk conditioningVBR Variable Bit Rate Voice Network SwitchingVAD Voice Activity Detection Virtual circuitCable redundancy Yellow alarmCables ASI ABR STDAdtf ATMFbtc DlciESP FRF.4 FrttSnmp PnniSAM SpvcVCI TftpTSR VPIDocumentation Response Card Strongly agree Strongly disagreeBusiness Reply Mail