Nortel Networks 311 NTDK16 Digital Line card

Functional description 507

Figure 126

Digital line card - block diagram

NTDK16 Digital Line card

The NTDK16 digital line card is equipped with 48 identical units. Each unit

provides a multiplexed voice,data, and signaling path to and from digital

apparatus over a 2-wire full duplex 512 kHz time compression multiplexed

(TCM) digital link. Each digital telephone and associated data terminal is

assigned a separate terminal number (TN) in the system database, for a

total of 96 addressable ports per card. Refer to Figure 127 "NTDK16 DLC"

(page 509).

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 01.04 Standard

Release 5.0 23May 2008

Contents

Main Page Contents New in this release 13 How to get help 15 Overview 17 Circuit card installation 61 Option settings 81 NT1R20 Off-Premise Station Analog Line card 119 NT4N39AA CP Pentium IV Card 161 NT5D11 and NT5D14 Lineside T1 Interface cards 169 NT5D33 and NT5D34 Lineside E1 Interface cards 263 NT5D60/80/81 CLASS Modem card (XCMC) 317 NT5D97 Dual-port DTI2 PRI2 card 325 NT5K02 Flexible Analog Line card 363 NT5K21 XMFC/MFE card 365 NT6D70 SILC Line card 373 NT6D71 UILC line card 383 NT6D80 MSDL card 389 NT7D16 Data Access card 419 NT8D02 and NTDK16 Digital Line cards 499 NT8D03 Analog Line card 533 NT8D09 Analog Message Waiting Line card 535 NT8D14 Universal Trunk card 567 NT8D15 E and M Trunk card 715 NT8D41AA Serial Data Interface Paddle Board 801 NT8D41BA Quad Serial Data Interface Paddle Board 821 NTAG26XMFR card 841 NTAK02SDI/DCH card 849 NTAK091.5 Mb DTI/PRI card 859 NTAK792.0 Mb PRI card 923 NTAK93D-channel Handler Interface daughterboard 953 NTBK22 MISP card 961 NTBK50 2.0 Mb PRI card 967 NTBK51 Downloadable D-channel Handler daughterboard 989 NTDW60 Media Gateway ControllerCard 1029 NTDW61 and NTDW66 Common Processor PentiumMobile Card 1035 NTDW62 and NTDW64 Media Gateway Controller Daughterboards 1045 NTDW65 VoiceGateway Media Card 1049 NTRB21 DTI/PRI/DCH TMDI card 1053 NTVQ01xx Media Card 1079 NTVQ55AA ITG Pentium card 1085 QPC513 Enhanced Serial Data Interface card 1089 QPC841 Quad Serial Data Interface card 1103 The TDS/DTR card 1117 Appendix A LAPB Data Link Control protocol 1129 New in this release Other New circuit cards for CS 1000 Release 5 How to get help Getting help from the Nortel web site Getting help over the telephone from a Nortel Solutions Center Getting help from a specialist by using an Express Routing Code Getting help through a Nortel distributor or reseller Overview Line cards NT1R20 Off-Premise Station Analog Line card NT5D11 and NT5D14 Lineside T1 interface card NT5D33 and NT5D34 Lineside E1 Interface card NT8D09 analog message waiting line card Page Operation Host interface bus Intelligent Peripheral Equipment Page Page Page Page Analog line interface units Coder/Decoder circuit Variable gain lters Balancing network Line interface and foreign voltage protection Digital line interface units TCM loop interfaces Signaling Analog line call operation Page Page Message waiting Analog line supervision Digital line call operation Lineside T1 and E1 call operation Page Page Loop Start Mode Page Ground Start Mode Page Ground Start Restrictions Voice frequency audio level Off-premise line protection Line protectors Line protection grounding Line and telephone components Telephones Trunk cards NT8D14 Universal Trunk card NT8D15 E and M Trunk card NTCK16 Generic Central Ofce Trunk card Installation Operation Host interface bus Intelligent Peripheral Equipment Page Page Page Page Trunk interface unit Page Serial Data Interface (SDI) cards Uses Features Specications Environmental Electrostatic discharge Electromagnetic interference Reliability Conguring the system software Maintenance Page Circuit card installation Card slots - Large System Circuit and installation Page Precautions guidelines before handling system equipment. Page Installing a circuit card DANGER Page Page Page Acceptance tests Introduction Conference cards Page Page Digitone receiver cards Line cards Multifrequency sender cards Multifrequency signaling cards Network cards Trunk cards Page Tone and digit switch cards Page Option settings Circuit card grid NT1R20 Off-Premise Station card NT5D12 Dual DTI/PRI (DDP) card General purpose switches Trunk interface switches Ring ground switches DCH mode and address select switches Page Illustrations of switch locations and settings NT6D42 Ringing Generator DC Page NT5D2101/NT9D1102 Core/Network module backplane NT6D68 Core module backplane NT6D80 Multi-purpose Serial Data Link card NT8D14 Universal Trunk card Page NT8D15 E and M Trunk card NT8D17 Conference/TDS card NT8D21 Ringing Generator AC NT8D22 System Monitor Page Page Page NT8D22 jumper settings NT8D41BA Quad Serial Data Interface Paddle Board DTE/DCE mode NT8D72 Primary Rate Interface card QPC43 Peripheral Signaling card QPC71 E and M/DX Signaling and Paging Trunk cards QPC414 Network card QPC441 3-Port Extender cards For CS 1000M SG and MG systems, QPC441 vintage F or later must be used in all modules. Page QPC559, QPC560 Loop Signaling Trunk cards QPC528 CO/FX/WATSTrunk cards QPC471 Clock Controller card Table50 "QPC471 vintage H" (page 110) lists option settings for the QPC471 Clock Controller card. QPC525, QPC526, QPC527, QPC777 CO Trunk card QPC550 Direct Inward Dial Trunk card Page QPC551 Radio Paging Trunk card QPC595 Digitone Receiver cards QPC577, QPC596 Digitone Receiver daughterboards QPC720 Primary Rate Interface card QPC775 Clock Controller card QPC841 4-Port Serial Data Interface card Page Page NT1R20 Off-Premise Station Analog Line card Introduction Page Page Self Test Page Page Page Maintenance communication Maintenance communications Maintenance communication Power interface Line interface units Page Page Microcontroller- Page Page Page Page Page Analog line interface Ringer limitations Operation Page Page Page Page Page Conguring the OPS analog line card Jumper strap settings Page Page Application Off-premise station application Page Page Other applications Transmission considerations Port-to-port loss Page Page Page Page Termination transmission characteristics Page Page Page NT4N39AA CP Pentium IV Card Introduction Page Page Page Memory Front panel connector pin assignments COM1 and COM2 ports USB port 10/100/1000 Mbps Ethernet ports Front panel LED indicators ITP connector (25 PIN, Debug Only) Post 80 Debug LEDs (Optional) Page NT5D11 and NT5D14 Lineside T1 Interface cards Introduction Page Card connections Faceplate Page Page Page Page Page Page Page T1 interface circuit Page Microcontrollers Page Page Man-Machine Interface T1 channel specications Page Installation and conguration Dip switch settings Address of Lineside T1 card to the MMI T1 framing T1 coding DSX-1 length Line supervision on T1 failure Daisy-chaining to MMI MMI master or slave Page Page Address of Lineside T1 card to the MMI T1 framing T1 Coding DSX-1 length Line supervision on T1 failure Daisy-Chaining to MMI MMI Master or Slave Page Page Page Page Cabling the Lineside T1 card Cabling from the I/O panel with the NT5D13AA LinesideT1 I/O cable Cabling from the I/O panel at the Main Distribution Frame Page Page Page T1 connections External alarm connections MMI connections Page Page Page Page T1 connections External alarm connections MMI connections Page Page Terminal conguration Software conguration Page Disconnect supervision Page Clocking Requirement Connecting MGC DECT Clock Reference Cable Pre requisites Page Man-Machine T1 maintenance interface software Description Alarms Page T1 performance counters and reports T1 verication and fault isolation testing Login and password Page Basic commands Page Page Page Conguring parameters Alarm parameters Page Page Display Conguration Alarm parameters Page Page Display Conguration Alarm operation and reporting Page Page Page Page Performance counters and reporting Page Page Testing Page Page Page Page Applications Page Page Page Page Page Page NT5D33 and NT5D34 Lineside E1 Interface cards Introduction Card connections Faceplate Page Page Page Overview E1 interface circuit Microcontrollers Man-Machine Interface ELEI additional functionality E1 channel specications Page Installation and Conguration Dip switch settings Address of LEI to the MMI E1 framing E1 Coding Line supervision on E1 failure Daisy-Chaining to MMI MMI Master or Slave Page Page Installation Available and restricted cardslots in the NT8D37 IPE module Cabling the LEI card Cabling from the I/O panel with the NT5D35AA or NT5D36AA lineside E1 I/O cable Page E1 Connections External Alarm Connections MMI Connections Page Terminal conguration Software Conguration Page Disconnect supervision Clocking Requirement Connecting MGC DECT Clock Reference Cable Pre requisites Page Man-Machine E1 maintenance interface software Description Alarms E1 Performance Counters and Reports E1 Verication and Fault Isolation Testing Login and Password Basic commands Page Conguring parameters Set Alarm Page Page Set Simple Set Mode Page Page Page Display Conguration (D C) Alarm operation and reporting Page Page Performance counters and reporting Page Testing Page Page Applications Page Page NT5D60/80/81 CLASS Modem card (XCMC) Introduction Page Page Page Page Data transmission specications Page Page NT5D97 Dual-port DTI2 PRI2 card Contents Introduction DANGER External D-Channel Interface DCH or MSDL NT5D97 faceplate The following sections provide a brief description of each element on the faceplate. Enable/Disable Switch ENET LEDs Trunk Disable (DIS) LEDs OOS LEDs NEA LEDs FEA LEDs LBK LEDs Unit 1 Clk Connectors Connector J5 (TRK) Connector J6 (DCH) Port denitions System capacity and performance Physical capacity D-Channel capacity CPU capacity Cable requirements E1 carrier cables Page Table141 "NTCK78AA cable pins" (page 335) lists the pin attributes for the NTCK78AA cable. Table142 "NTCK79AA cable pins" (page 336) lists the pin attributes for the NTCK79AA cable. Reference clock cables MSDL/DCH cables External DCH cable External MSDL cable Cable diagrams Page NT5D97 circuit card locations NT5D97AA/AB DIP switch settings Page Transmission mode Line build out Receiver impedance Ring ground switches for NT5D97AA/AB DCH Address select switch for NTBK51AA daughterboard for NT5D97AA/AB NT5D97AD DIP switch settings Page Page Trunk interface switchesfor NT5D97AD Trunk 0 switches Switch S12 gives the MPU information about its environment. Switch S2 selects the Transmissionmode. Switch S3,S4, and S5 select LBO function. Switch S6 selects the Receiver interface. DCH Address select switch forNTBK51AA daughterboard for NT5D97AD MSDL external card Use Table160 "Switch setting for MSDL external card" (page 350) to set the card address. Clock operation There are two types of clock operation - tracking mode and free-run mode. Tracking mode Free run (non-tracking) mode Reference clock errors Automatic clock recovery Automatic clock switching Clock congurations Page Operation Page Page Page Page Page Conguring the NT5D97 Testability and diagnostics Page NT5K02 Flexible Analog Line card Introduction Applications Page NT5K21 XMFC/MFE card Introduction MFC signaling Forward and backward signals MFE signaling Sender and receiver mode Receive mode Send mode XMFC sender and receiver specications XMFE sender and receiver specications Page Page Page NT6D70 SILC Line card Introduction ISDN BRI Page Page Page Micro Controller Unit (MCU) IPE interface logic Page S/T interface logic Page Page NT6D71 UILC line card Introduction Page Micro Controller Unit (MCU) IPE interface logic Page U interface logic NT6D80 MSDL card Introduction Page CPU bus interface Page Micro Processing Unit (MPU) Memory Serial interface MSDL operations Data ow Engineering guidelines Available network card slots Card mix Address decoding Port specications Page Page Implementation guidelines Environmental and power requirements Installation Device number MSDL interfaces Page Installing the MSDL card Cable requirements Page Cable installation PRI trunk connections I/O panel connections MSDL planning form Maintenance MSDL states Manually disabled Manually enabled System disabled Maintaining the MSDL System controlled maintenance Manually controlled maintenance Enabling the MSDL Disabling the MSDL Resetting the MSDL Displaying MSDL status Self-testing the MSDL Manually isolating and correcting faults Newly installed MSDL cards Previously operating MSDL cards Replacing MSDL cards Symptoms and actions System disabled actions SYSTEM DISABLEDSELF-TESTING SYSTEM DISABLEDSELF-TESTS PASSED SYSTEM DISABLEDSELF-TESTS FAILED SYSTEM DISABLEDSRAM TESTS FAILED SYSTEM DISABLEDOVERLOAD SYSTEM DISABLEDRESET THRESHOLD SYSTEM DISABLEDFATALERROR SYSTEM DISABLEDRECOVERYTHRESHOLD NT7D16 Data Access card Content list Introduction Features Controls and indicators Card status Electronic Industries Association signal monitors CONNECT Port mode Dialing operations Port rmware in idle state Call Set-up abort Make Port Busy on loss of DTR Inactivity timeout Wire test mode Independent storage of dialing parameters User input Operating modes Page Page Selecting the proper mode for Modem connectivity Mode 0 Conguring modems for mode 0 Programing DACfor mode 0 in service change LD11 Mode 1 Conguring modems for mode 1 Programing DACfor mode 1 in service change LD11 Mode 2 Conguring Hayes 1200 for mode 2 Programing DACfor mode 2 in service change LD11 Mode 3 Conguring Hayes 1200 for mode 3 Programing DACfor mode 3 in service change LD11 Selecting the proper mode for Gateway connectivity Page Mode 4 Programing DACfor mode 4 in service change LD 11 Mode 5 Programing DACfor mode 5 in service change LD 11 Mode 6 Programing DACfor mode 6 in service change LD 11 Mode 7 Programing DACfor mode 7 in service change LD 11 Selecting the proper mode for Host connectivity Mode 8 Mode 9 Programing DACfor mode 9 in service change LD 11 Mode 10 Programing DACfor mode 10 in service change LD 11 Mode 11 Programing DACfor mode 11 in service change LD 11 Selecting the proper mode for Terminal connectivity Mode 12 Programing DACfor mode 12 in service change LD 11 Mode 13 Programing DACfor mode 13 in ser vice change LD11 Mode 14 Programing DACfor mode 14 in service change LD 11 Mode 15 Programing DACfor mode 15 in service change LD 11 Mode selection baud rates See Table180 "Connect and disconnect protocol" (page 445) for connect and disconnect protocol. Page Page Page Page Page Page Page Keyboard dialing Initiating conditions Echo Prompts Call abort Autobaud Baud Rate xxxx expected Auto parity Dialing operation Primary commands Call (C) Autodial (A) Speed Call (S) Page Page Ring Again Page Not in service No response from the system Hayes dialing Initiating conditions Input requirements Echo Result codes and messages Baud rate detection Parity detection Dialing operation S registers Page Reset Hayes parameters Outbound calls Inbound calls Off Line mode Specications QPC430 and QPC723 interfaces Download parameters System parameters Operating parameters Upload parameters System database requirements Page Note: Warning ToneDenied (WTD) defaults if DTA is entered. Power supply EIA signals supported Environmental Reliability Installing the Data Access card Cabinet system Large System System compatibility Port conguration Cabling Page Page Page Page Backplane pinout and signaling Page Page Conguring the Data Access card DAC administration (LD 11) Page Page Printing the card parameters (LD 20) Connecting Apple Macintosh to the DAC Upgrading systems Large System and CS 1000M HG upgrade Segment 0 Segment 1 Segment 2 Segment 3 Page Page NT8D02 and NTDK16 Digital Line cards Introduction Page Page Page Page Page Page Page NTDK16 Digital Line card Page Page Page Functional description of the NT8D02 Functional description of the NTDK16 Digital line interfaces Page TCM loop interface circuit Page Page Page This section lists the electrical characteristics of the NT8D02 Digital Line Digital line interface specications Technical summary Digital line interface specications Page Page Page Page Page Page Page Page Page Page Page Page NT8D03 Analog Line card Overview Page NT8D09 Analog Message Waiting Line card Introduction Page Page Page Page Page Page Page Page Page Page Line interface units Page Technical summary or Analog line interface Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page NT8D14 Universal Trunk card Introduction Page Page Page Page Page Page Page Page Page Page Page Page Trunk interface units Page Page Page Page Operation Loop start operation Page Page Page Page Page Page Page Page Page Page Ground start operation Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Direct inward dial operation Page Page Page Page Page Two-way,loop dial repeating, TIE trunk operation Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Senderized operation for DID and two-way loop DR trunks Page Page Page Page Page Page Page Page Page Outgoing automatic, incoming dial operation Page Page Page Page Page Page Page Page Page Page Page Page Recorded announcement trunk operation Page Recorded announcement machines Page Page RAN modes of operation Page Page Page Page Multi-Channel RAN modes Page Page Page Call routing to RAN trunks Programming RAN trunks Page Page Page Page Page Powerto the NT8D14 Universal Trunk card is provided by the module power supply (ac or dc). Page Page Release control PAD switching Page Page Page Page Page Page Page Page Jumper strap settings Page Page Service change entries Page Page Page Page Page Page Page Page Page Page Page Page Page Applications Paging trunk operation Page Music operation Page Page NT8D15 E and M Trunk card Introduction Page Page Page Page Page Page Page Page Common features Page Page Page Page Page Trunk circuit features Trunk unit functions Page Page Page Page Page Page Page Page Page Page Card LAN Page Page Page Maintenance features Operation Signaling and call control E and M Type I signaling Page Page Page Page Page Page Page Page E and M Type II signaling Release control Page Duplex signaling Page Page Page Page Page Page Page Page Page Page Page Page Page Page Table289 "Power requirements" (page 774) lists the power requirements Table290 "Power requirements" (page 774) lists the power requirements Page Page Page Page Page Page Page Page Page Page Jumper settings Page Page Page Software service entries Page Page Page Page Page Applications PAD switching Page Paging trunk operation Page Page Page NT8D41AA Serial Data Interface Paddle Board Introduction Page Page Page Conguring the SDI paddle board Page Page Page Applications Page Page Page Page Page Conguring the SDI paddle board Page Page Applications Page Page NT8D41BA Quad Serial Data Interface Paddle Board Introduction Page Page Page Conguring the QSDI paddle board Page Page Applications Page Page Page Page Page Page Conguring the QSDI paddle board Page Page Applications Page Page NTAG26 XMFR card Introduction MF signaling XMFR receiver specications Page MF signaling XMFR receiver specications Page Page Page NTAK02 SDI/DCH card Introduction NTAK02 SDI/DCH card Connecting to the ports Page Page Characteristics of the low speed port Characteristics of the high speed port Introduction NTAK02 SDI/DCH card Connecting to the ports Page Page Characteristics of the low speed port Characteristics of the high speed port NTAK09 1.5 Mb DTI/PRI card Introduction Page Page Page Page NTAK09 DTI/PRI power on self-test NTAK20 power on self-test NTAK93 self-test DTI/PRI local self-test Restrictions and limitations Page Page Interconnection Page Digital pad Page D-channel interface Page DS-1 Carrier interface Transmitter Receiver Connector pinout Page Clock rate converter NTAK10 2.0 Mb DTI card Introduction Page Page Page Page Page Applicability to France Architecture Page Transmit data Receive data DS-30X microprocessor Interconnections CEPT interface Channel associated signaling Incoming signal Outgoing supervisory signals Periodic Pulse Metering (PPM) TS16 microprocessor Change-of-state microprocessor Tx Direction Rx Direction Page Page Clock controller functions and features Page Page Reference clock selection through software Reference clock interface Switch settings Page NTAK20 Clock Controller daughterboard Introduction Page Page Page Tracking mode Free-run (non-tracking) Faceplate LEDs Page Phase difference detector circuit Digital phase lock loops System clock specication and characteristics Page EIA/CCITT compliance Monitoring references Page Page Digital to analog converter Holdover and free-run CPU-MUX bus interface Signal conditioning Reference Clock Selection External timing interface Hardware integrity and regulatory environment hardware integrity and regulatory specications: The clock controller complies with the following hardware integrity and regulatory specications: Page NTAK79 2.0 Mb PRI card Introduction Page Page Page Page NTAK79 switches Switch SW1 - DCHI Conguration Switch SW2 - Carrier Impedance Conguration Switch SW3 - Clock Controller Conguration Switch SW4 - Carrier Shield Grounding Switch SW1 - DCHI Conguration Switch SW2 - Carrier Impedance Conguration Switch SW3 - Clock Controller Conguration Switch SW4 - Carrier Shield Grounding Page Architecture Page Digital PAD Page Page Impedance matching Carrier grounding Receiver functions Transmitter functions Loopbacks CEPT transceiver Slip control D-channel support interface Page DCHI special applications connection Card-LAN interface Page Page Clock controller functions and features Page Page Holdover and free-run Reference clock selection through software Page NTAK93 D-channel Handler Interface daughterboard Introduction Page Faceplate LEDs NTAK091.5 Mb PRI and NTBK50 2.0 MB PRI cards Microprocessors DMA controller Random Access Memory (RAM) Read Only Memory (ROM) LAPD data link/asynchronous controller Counter/timer controller Software interface circuit DPNSS/DCHI Port D-Port - SDTI/PRI interface NTBK22 MISP card Introduction Page Page Micro Processing Unit (MPU) High-Level Data Link Controller (HDLC) CPU to MISP bus interface MISP network bus interface Page NTBK50 2.0 Mb PRI card Introduction Page The LEDs are described in Table402 "NTBK50 faceplate LEDs" (page 969). Page Page Page Page Page Architecture Page Digital PAD Page Page Impedance matching (Switch SW2) Carrier grounding Carrier Shield grounding (Switch SW4) Receiver functions Transmitter functions Loopbacks CEPT transceiver Slip control D-channel support interface DCHI Conguration for NTAK93only (SW1) Card-LAN interface Page Page NTBK51 Downloadable D-channel Handler daughterboard Introduction Page Page Page Microprocessors Main memory Shared memory EPROM memory Flash EPROM memory EEPROM memory Serial communication controller Bus timer Download operation System initialization Card enabling or application enabling Card reset Background audit Page NTCK16 Generic Central Ofce Trunk cards Introduction Switch settings Self-test Common features Operation Loop start operation Idle state Call placed by Central Ofce Call placed by CS 1000E, CS 1000M, and Meridian 1 Central Ofce disconnect Pad switching Cross connections Page Page Page Trunk Data Block Respond to the prompts in LD 14 as shown: NTCK16BX Central Ofce trunk card Route Data Block Trunk Data Block Respond to the prompts in LD 14. BTID values by country Applications Periodic Pulse Metering Detection limits Busy tone detect Detection limits Loss switching Equivalencies Trunk to Trunkconnection Call disconnect NTDK20 Small System Controller card Introduction Page Memory NTTK25 daughterboard 100BaseT IP daughterboards Page Page PC card interface Security device SDI ports Conferencing 10BaseT port Media Gateway/Media Gateway Expansion card slot assignment Page Page Page NTDW60 Media Gateway Controller Card Introduction Page Page Processor Ethernet ports External connections Internal connections Expansion daughterboards Faceplate LED display Faceplate LED display NTDW61 and NTDW66 Common Processor Pentium Mobile Card Introduction Page Page Cabinet/chassis support Media storage Fixed media drive Removable media drive Hard disk drive Memory USB 2.0 port Security device Faceplate Page Faceplate buttons Reset Init DIP switch LED indicators Status LED Page NTDW62 and NTDW64 Media Gateway Controller Daughterboards Introduction Media Gateway Controller card Page Daughterboard congurations Page NTDW65 Voice Gateway Media Card Introduction Ethernet ports External connections Internal connections Backplane interfaces TTY settings Faceplate LED display Page NTRB21 DTI/PRI/DCH TMDI card Introduction Page Page Page Page Page Page Page Figure 303 "NTRB21 TMDI card faceplate" (page 1062) shows the faceplate of the NTRB21 TMDI card. Page Page Page Software description Hardware description NTRB21 TMDI card Page Page Interconnection Page Digital pad Page D-channel interface Page DS-1 Carrier interface Transmitter Receiver Connector pinout The connection to the external digital carrier is via a 15 position Male D type connector. The connection to the external digital carrier is through a 15 position Male D-type connector. NTAK20 ClockController (CC) daughterboard Clock rate converter NTVQ01xx Media Card Hardware architecture Faceplate connectors and indicators Reset switch Status LED PC card slot Ethernet activity LEDs Maintenance hex display RS-232 Asynchronous Maintenance Port Survivability Page NTVQ55AA ITG Pentium card Faceplate components NWK ITG-P LED (Card Status) Reset switch NWK Status LED Page QPC513 Enhanced Serial Data Interface card Introduction Page Page Synchronous communication Clock timing option Test and maintenance features Self-test Fault detection Fault isolation Connection characteristics Electrical interface options Page Page Conguring the ESDI card Address switch settings DTE/DCE mode jumper settings Page Page Applications Page QPC841 Quad Serial Data Interface card Introduction Page Page Page Page Page Conguring the QSDI card Address switch settings Baud rate switch settings DTE/DCE mode switch settings Test switch setting Page Applications Page Page Page The TDS/DTR card Introduction Features Tone transmitter Tone detector SDI function Tones and cadences Page Page Page Page Page Page Page Page Page Page Appendix A LAPB Data Link Control protocol Introduction Operation Frame structure LAPB balanced class of procedure Balanced conguration Combined station Asynchronous Balanced Mode Commands and responses Description of procedure Page Nortel Communication Server 1000 Circuit Card Reference