Nortel 1000 User Manual

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Nortel Communication Server 1000

Circuit Card Reference

Release: 5.5 Document Revision: 02.06

www.nortel.com

NN43001-311

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Nortel Communication Server 1000 Release: 5.5 Publication: NN43001-311 Document status: Standard Document release date: 27 August 2008

Sourced in Canada

LEGAL NOTICE

While the information in this document is believed to be accurate and reliable, except as otherwise expressly agreed to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF ANY KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document are subject to change without notice.

Nortel, the Nortel Logo, the Globemark, SL-1, Meridian 1, and Succession are trademarks of Nortel Networks.

All other trademarks are the property of their respective owners.

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Contents

New in this release 13

Other 13

How to get help 15

Getting help from the Nortel web site 15 Getting help over the telephone from a Nortel Solutions Center 15 Getting help from a specialist by using an Express Routing Code 15 Getting help through a Nortel distributor or reseller 16

Overview 17

Contents 17 Line cards 18 Trunk cards 45 Installation 46 Operation 47 Serial Data Interface (SDI) cards 55

Revision History 13

Circuit card installation 59

Contents 59 Card slots - Large System 59 Circuit and installation 60 Precautions 63 Installing a circuit card 64

Acceptance tests 69

Contents 69 Introduction 69 Conference cards 69 Digitone receiver cards 72 Line cards 72 Multifrequency sender cards 73 Multifrequency signaling cards 74 Network cards 74 Trunk cards 75 Tone and digit switch cards 76

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Option settings 79

Contents 79 Circuit card grid 80 NT1R20 Off-Premise Station card 81 NT5D12 Dual DTI/PRI (DDP) card 82 NT6D42 Ringing Generator DC 87 NT6D80 Multi-purpose Serial Data Link card 89 NT8D14 Universal Trunk card 90 NT8D15 E and M Trunk card 92 NT8D17 Conference/TDS card 93 NT8D21 Ringing Generator AC 94 NT8D22 System Monitor 94

NT8D22 jumper settings 98 NT8D41BA Quad Serial Data Interface Paddle Board 99 QPC43 Peripheral Signaling card 101 QPC414 Network card 101 QPC441 3-Port Extender cards 101 QPC841 4-Port Serial Data Interface card 104

NT1R20 Off-Premise Station Analog Line card 107

Contents 107 Introduction 107 Physical description 109 Functional description 111 Electrical specifications 123 Operation 126 Connector pin assignments 131 Configuring the OPS analog line card 132 Application 136

NT4N39AA CP Pentium IV Card 151

Contents 151 Introduction 151 Physical description 151 Functional description 154 Front panel connector pin assignments 155

NT5D11 and NT5D14 Lineside T1 Interface cards 159

Contents 159 Introduction 159 Physical description 160 Functional description 167 Electrical specifications 176 Installation and configuration 179

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Clocking Requirement 214

Connecting MGC DECT Clock Reference Cable 214 Man-Machine T1 maintenance interface software 217 Applications 247

NT5D33 and NT5D34 Lineside E1 Interface cards 255

Contents 255 Introduction 255 Physical description 256 Functional description 260 Electrical specifications 264 Installation and Configuration 266 Installation 272 Clocking Requirement 282

Connecting MGC DECT Clock Reference Cable 282 Man-Machine E1 maintenance interface software 284 Applications 307

NT5D60/80/81 CLASS Modem card (XCMC) 311

Contents 311 Introduction 311 Physical description 312 Functional description 312 Electrical specifications 316 Configuration 317

NT5D97 Dual-port DTI2 PRI2 card 319

Contents 319 Introduction 319 Physical description 320 Functional description 335 Architecture 345 Operation 350

NT5K02 Flexible Analog Line card 357

Contents 357 Introduction 357 Applications 358

NT5K21 XMFC/MFE card 359

Contents 359 Introduction 359 MFC signaling 359 MFE signaling 361 Sender and receiver mode 362 Physical specifications 364

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NT6D70 SILC Line card 367

Contents 367 Introduction 367 Physical description 368 Functional description 369

NT6D71 UILC line card 377

Contents 377 Introduction 377 Physical description 378 Functional description 378

NT6D80 MSDL card 383

Contents 383 Introduction 383 Physical description 384 Functional description 385 Engineering guidelines 390 Installation 395 Maintenance 402 Replacing MSDL cards 408 Symptoms and actions 409 System disabled actions 409

NT8D02 and NTDK16 Digital Line cards 413

Contents 413 Introduction 413 Physical description 415 Functional description 419 Electrical specifications 433 Digital line interface specifications 433 Connector pin assignments 439 Configuration 442

NT8D09 Analog Message Waiting Line card 449

Contents 449 Introduction 449 Physical description 452 Functional description 455 Connector pin assignments 473 Configuration 474

NT8D14 Universal Trunk card 483

Contents 483 Introduction 483 Physical description 488

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Functional description 493 Operation 501 Electrical specifications 592 Connector pin assignments 602 Configuration 606 Applications 627

NT8D15 E and M Trunk card 633

Contents 633 Introduction 633 Physical description 637 Functional description 641 Operation 665 Electrical specifications 691 Connector pin assignments 696 Configuration 702 Applications 713

NT8D41BA Quad Serial Data Interface Paddle Board 721

Contents 721 Introduction 721 Physical description 722 Functional description 722 Connector pin assignments 724 Configuring the QSDI paddle board 725 Applications 729

NTAG26 XMFR card 739

Contents 739 Physical specifications 742 Introduction 742

NTAK02 SDI/DCH card 747

Contents 747 Introduction 747 NTAK02 SDI/DCH card 747

NTAK09 1.5 Mb DTI/PRI card 757

Contents 757 Introduction 757 Physical description 758 Functional description 765 Architecture 767

NTAK10 2.0 Mb DTI card 777

Contents 777 Introduction 777

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Physical description 778 Functional description 781 Architecture 783

NTAK20 Clock Controller daughterboard 803

Contents 803 Introduction 803 Physical description 809 Functional description 810

NTAK79 2.0 Mb PRI card 823

Contents 823 Introduction 823 Physical description 824 Functional description 832 Architecture 833

NTAK93 D-channel Handler Interface daughterboard 853

Contents 853 Introduction 853 Physical description 855 Functional description 856

NTBK22 MISP card 861

Contents 861 Introduction 861 Physical description 861 Functional description 862

NTBK50 2.0 Mb PRI card 867

Contents 867 Introduction 867 Physical description 868 Functional description 873 Architecture 875

NTBK51 Downloadable D-channel Handler daughterboard 889

Contents 889 Introduction 889 Physical description 890 Functional description 892 Download operation 897

NTCK16 Generic Central Office Trunk cards 901

Contents 901 Introduction 901 Physical description 902 Functional description 903

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Operation 903 Electrical specifications 905 Connector pin assignments 906 Configuration 906 Applications 914

NTDK20 Small System Controller card 917

Contents 917 Introduction 917 Memory 919 100BaseT IP daughterboards 920 PC card interface 923 Security device 924 SDI ports 924 Conferencing 925 Media Gateway/Media Gateway Expansion card slot assignment 925

NTDW60 Media Gateway Controller Card 929

Contents 929 Introduction 929 Processor 932 Ethernet ports 932

External connections 932

Internal connections 932 Expansion daughterboards 932 Backplane interface 932 Serial data interface ports 933

TTY default settings 933

MGC serial port configuration change 933 Faceplate LED display 933

Faceplate LED display 934

NTDW61 and NTDW66 Common Processor Pentium Mobile Card 935

Contents 935 Introduction 935 Cabinet/chassis support 938 Media storage 939

Fixed media drive 939

Removable media drive 939

Hard disk drive 939 Memory 939 Ethernet interfaces 939

ELAN 939

HSP 939

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TLAN 939 Serial data interface ports 940

TTY parameters 940 USB 2.0 port 940 Security device 940 Faceplate 941 Faceplate buttons 943

Reset 943

Init 943 DIP switch 943 LED indicators 943

Status LED 943

Active CPU LED 943

Ethernet LEDs 944

Removable and fixed media drive LEDs 944

NTDW62 and NTDW64 Media Gateway Controller Daughterboards 945

Contents 945 Introduction 945 Media Gateway Controller card 945

Daughterboard configurations 946

NTDW65 Voice Gateway Media Card 949

Contents 949 Introduction 949 Ethernet ports 950

External connections 950

Internal connections 950 Backplane interfaces 950 Serial data interface ports 951

TTY settings 951 Faceplate LED display 951

NTRB21 DTI/PRI/DCH TMDI card 953

Contents 953 Introduction 953 Physical description 955 Functional description 963 Software description 965 Hardware description 965 Architecture 967

NTVQ01xx Media Card 981

Contents 981 Physical description 981

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Hardware architecture 982 Functional description 984

QPC841 Quad Serial Data Interface card 985

Contents 985 Introduction 985 Physical description 986 Functional description 987 Connector pin assignments 988 Configuring the QSDI card 990 Applications 994

The TDS/DTR card 997

Contents 997 Introduction 997 Features 997

LAPB Data Link Control protocol 1009

Contents 1009 Introduction 1009 Operation 1009 Frame structure 1010 LAPB balanced class of procedure 1011 Commands and responses 1011 Description of procedure 1012

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New in this release

This technical document provides information about circuit cards for the CS 1000 Release 5.5. Non-supported circuit cards have been deleted from the document.

Other

Revision History

August 2008

December 2007

June 2007

May 2007

August 2005

September 2004

October 2003

Standard 02.06. This document is up-issued to include additional information in the section ’Jumper and switch settings’ for Release 5.5.

Standard 02.05. This document has been up-issued to support Communication Server Release 5.5.

Standard 01.02. This document has been up-issued to reflect changes in technical content for CoreNet shelf supporting CP PII and CP PIV function.

Standard 01.01. This document is up-issued to support Nortel Communication Server 1000 Release 5.0. This document contains information previously contained in the following legacy document, now retired, Circuit Card (553-3001-211).

Standard 3.00. This document is up-issued to support Nortel Communication Server 1000 Release 4.5.

Standard 2.00. This document is up-issued for Nortel Communication Server 1000 Release 4.0.

Standard 1.00. This is a new technical document for Succession 3.0. It was created to support a restructuring of the Documentation Library, which resulted in the merging of multiple legacy technical documents. This new document consolidates information previously contained in the following legacy documents, now retired:

• Line Cards: Description, (553-3001-105)

• Trunk Cards: Description, (553-3001-106)

• Serial Data Interface Cards: Description, (553-3001-107)

• NT7D16 Data Access Card: Description and operation, (553-3001-191)

• Multi-purpose Serial Data Link: Description, (553-3001-195)

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14 New in this release

• Circuit Cards: Installation and Testing, (553-3001-211)

• Option 11C and 11C mini Technical Reference Guide, (553-3011-100)

(Content from Option 11C and 11C mini Technical Reference

Guide, (553-3011-100) also appears in Telephones and Consoles Fundamentals (NN43001-567)

• Circuit Card Reference, (553-3023-211)

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How to get help

This chapter explains how to get help for Nortel products and services.

Getting help from the Nortel web site

The best way to get technical support for Nortel products is from the Nortel Technical Support web site:

ww.nortel.com/support

This site provides quick access to software, documentation, bulletins, and tools to address issues with Nortel products. From this site, you can:

• download software, documentation, and product bulletins

•

search the Technical Support Web site and the Nortel Knowledge Base for answers to technical issues

•

open and manage technical support cases

Getting help over the telephone from a Nortel Solutions Center

If you do not find the information you require on the Nortel Technical Support web site, and you have a Nortel support contract, you can also get help over the telephone from a Nortel Solutions Center.

In North America, call 1-800-4NORTEL (1-800-466-7835). Outside North America, go to the following web site to obtain the telephone

number for your region:w

ww.nortel.com/callus

Getting help from a specialist by using an Express Routing Code

To access some Nortel Technical Solutions Centers, you can use an Express Routing Code (ERC) to quickly route your call to a specialist in your Nortel product or service. To locate the ERC for your product or service, go to:w

ww.nortel.com/erc

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16 How to get help

Getting help through a Nortel distributor or reseller

If you purchased a service contract for your Nortel product from a distributor or authorized reseller, contact the technical support staff for that distributor or reseller.

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Overview

Contents

This section contains information on the following topics:

“Line cards” (page 18)

“Installation” (page 19) “Operation” (page 21) “Analog line interface units” (page 26) “Digital line interface units” (page 28) “Analog line call operation” (page 30) “Digital line call operation” (page 34) “Lineside T1 and E1 call operation” (page 34) “Voice frequency audio level” (page 43) “Off-premise line protection” (page 43) “Line protectors” (page 43) “Line protection grounding” (page 44) “Line and telephone components” (page 44)

“Trunk cards” (page 45)

“Host interface bus” (page 48) “Trunk interface unit” (page 53)

“Serial Data Interface (SDI) cards” (page 55)

“Uses” (page 56) “Features” (page 56) “Specifications” (page 56) “Installation” (page 57) “Maintenance” (page 58)

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18 Overview

Line cards

The following line cards are designed using the Intelligent Peripheral Equipment (IPE) architecture and are recommended for use in all new system designs.

Each of the line cards was designed to fit a specific system need. Table 1

"Line card characteristics" (page 18) lists the line card characteristics.

Table 1 Line card characteristics

Part Number Description Lines

NT1R20 Off-premise

station analog line card

NT5D11 Lineside T1

Interface card

NT5D33/34Lineside E1

Interface card

Supervised Line Type

Analog Interrupted dial

T1 None Yes IPE

E1 None Yes IPE

Message Waiting

tone

Analog

Lines Architecture

Yes IPE

NT8D02 Digital Line

card (16 voice/16 data)

NT8D09 Analog

Message Waiting Line card

NT1R20 Off-Premise Station Analog Line card

The NT1R20 Off-Premise Station (OPS) Analog Line card is an intelligent eight-channel analog line card designed to be used with 2-wire analog terminal equipment such as analog (500/2500-type) telephones and analog modems. Each line has integral hazardous and surge voltage protection to protect the system from damage due to lightning strikes and accidental power line connections. This card is normally used whenever the phone lines leave the building in which the switch is installed. The OPS line card supports message waiting notification by interrupting the dial tone when the receiver is first picked up. It also provides battery reversal answer and disconnect analog line supervision and hook flash disconnect analog line supervision features.

Digital Message

waiting signal forwarded to digital phone for display

Analog Lamp No IPE

No IPE

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Line cards 19

NT5D11 and NT5D14 Lineside T1 interface card

The NT5D11/14 Lineside T1 Interface card is an intelligent 24-channel digital line card that is used to connect the switch to T1-compatible terminal equipment on the lineside. The T1-compatible terminal equipment includes voice mail systems, channel banks containing FXS cards, and key systems such as the Nortel Norstar. The Lineside T1 card differs from trunk T1 cards in that it supports terminal equipment features such as hook-flash, transfer, hold, and conference. It emulates an analog line card to the system software.

NT5D33 and NT5D34 Lineside E1 Interface card

The NT5D33/34 Lineside E1 Interface card is an intelligent 30-channel digital line card that is used to connect the switch to E1-compatible terminal equipment on the lineside. The E1-compatible terminal equipment includes voice mail systems. The lineside E1 card emulates an analog line card to the system software.

NT8D02 Digital Line card

The NT8D02 Digital Line card is an intelligent 16-channel digital line card that provides voice and data communication links between a CS 1000E, CS 1000M, and Meridian 1switch and modular digital telephones. Each of the 16 channels support voice-only or simultaneous voice and data service over a single twisted pair of standard telephone wire.

NT8D09 analog message waiting line card

The NT8D09 Analog Message Waiting Line card is an intelligent 16-channel analog line card designed to be used with 2-wire terminal equipment such as analog (500/2500-type) telephones, modems, and key systems. This card can also provide a high-voltage, low-current signal on the Tip and Ring pair of each line to light the message waiting lamp on phones equipped with that feature.

Installation

This section provides a high-level description of how to install and test line cards.

IPE line cards can be installed in any slot of the NT8D37 IPE module.

Figure 1 "IPE line cards shown installed in an NT8D37 IPE module" (page

20) shows where an IPE line card can be installed in an NT8D37 IPE

module.

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Figure 1 IPE line cards shown installed in an NT8D37 IPE module

When installing line cards, follow these general procedures:

Step Action 1 Configure the jumpers and switches on the line card (if any) to

meet system needs.

2 Install the line card into the selected slot. 3 Install the cable that connects the backplane connector on the

IPE module to the module I/O panel.

4 Connect a 25-pair cable from the module I/O panel connector to

the Main Distribution Frame (MDF).

5 Connect the line card output to the selected terminal equipment

at the MDF.

6 Configure the individual line interface unit using the Analog

(500/2500-type) Telephone Administration program LD 10 for analog line interface units and Multi-line Telephone Administration program LD 11 for digital line interface units.

--End--

Once these steps are complete, the terminal equipment is ready for use.

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Operation

This section describes how line cards fit into the CS 1000E, CS 1000M, and Meridian 1architecture, the busses that carry signals to and from the line cards, and how they connect to terminal equipment. These differences are summarized in Table 2 "IPE module architecture" (page 21).

Host interface bus

Cards based on the IPE bus use a built-in microcontroller. The IPE microcontroller is used to do the following:

•

• configure the card according to instructions issued by the system

•

Table 2 IPE module architecture

Parameter IPE

Line cards 21

perform local diagnostics (self-test)

report back to the system information such as card identification (type, vintage, and serial number), firmware version, and programmed configuration status)

Card Dimensions 31.75 x 25.4 x 2.2 cm (12.5 x10.0 x 0.875

in.). Network Interface DS-30X Loops Communication Interface card LAN Link Microcontroller 8031/8051 Family Peripheral Interface card NT8D01 Controller card Network Interface card NT8D04 Superloop Network card Modules NT8D37 IPE module

Intelligent Peripheral Equipment

IPE line cards all share a similar architecture. Figure 2 "Typical IPE analog

line card architecture" (page 23) shows a typical IPE line card architecture.

The various line cards differ only in the number and types of line interface units.

The switch communicates with IPE modules over two separate interfaces. Voice and signaling data are sent and received over DS-30X loops, and maintenance data is sent over a separate asynchronous communication link called the card LAN link.

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Signaling data is information directly related to the operation of the telephone line. Some examples of signaling commands include:

•

off-hook/on-hook

•

ringing signal on/off

• message waiting lamp on/off

Maintenance data is data relating to the configuration and operation of the IPE card, and is carried on the card LAN link. Some examples of maintenance data include:

•

polling

• reporting of self-test status

• CP initiated card reset

•

reporting of card ID (card type and hardware vintage)

• reporting of firmware version

•

downloading line interface unit parameters

•

reporting of line interface unit configuration

•

enabling/disabling of the DS-30X network loop bus

• reporting of card status or T1 link status

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Figure 2 Typical IPE analog line card architecture

Line cards 23

DS-30X loops The line interfaces provided by the line cards connect

to conventional 2-wire (tip and ring) line facilities. IPE analog line cards convert the incoming analog voice and signaling information to digital form and route it to the Call Server over DS-30X network loops. Conversely, digital voice and signaling information from the Call Server is sent over DS-30X network loops to the analog line cards where it is converted to analog form and applied to the line facility.

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24 Overview

IPE digital line cards receive the data from the digital phone terminal as 512 kHz Time Compressed Multiplexed (TCM) data. The digital line card converts that data to a format compatible with the DS-30X loop and transmits it in the next available timeslot. When a word is received from the DS-30X loop, the digital line card converts it to the TCM format and transmits it to the digital phone terminal over the digital line facility.

A separate dedicated DS-30X network loop is extended between each IPE line/trunk card and the controller cards within an IPE module. A DS-30X network loop is composed of two synchronous serial data buses. One bus transports in the Transmit (Tx) direction towards the line facility and the other in the Receive (Rx) direction towards the CS 1000E, CS 1000M, and Meridian 1.

Each bus has 32 channels for Pulse Code Modulated (PCM) voice data. Each channel consists of a 10-bit word. See Figure 3 "DS-30X loop data

format" (page 25). Eight of the 10 bits are for PCM data, one bit is the call

signaling bit, and the last bit is a data valid bit. The eight-bit PCM portion of a channel is called a timeslot. The DS-30X loop is clocked at 2.56 Mbps (one-half the 5.12 MHz clock frequency supplied by the controller card). The timeslot repetition rate for a single channel is 8 kHz. The controller card also supplies a locally generated 1 kHz frame sync signal for channel synchronization.

Signaling data is transmitted to and from the line cards using the call signaling bit within the 10-bit channel. When the line card detects a condition that the switch needs to know about, it creates a 24-bit signaling word. This word is shifted out on the signaling bit for the associated channel one bit at a time during 24 successive DS-30X frames. Conversely, when the switch sends signaling data to the line card, it is sent as a 24-bit word divided among 24 successive DS-30X frames.

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Figure 3 DS-30X loop data format

DS-30Y network loops extend between controller cards and superloop network cards in the Common Equipment (CE). They function in a manner similar to DS-30X loops. See Figure 5 "Digital line interface unit block

diagram" (page 29).

Line cards 25

A DS-30Y loop carries the PCM timeslot traffic of a DS-30X loop. Four DS-30Y network loops form a superloop with a capacity of 128 channels (120 usable timeslots). See Communication Server 1000M and Meridian 1 Large System Planning and Engineering (NN43021-220) for more information on superloops.

Card LAN link Maintenance communication is the exchange of control and status data between IPE line or trunk cards and the Call Server by way of the NT8D01 Controller card. Maintenance data is transported through the card LAN link. This link is composed of two asynchronous serial buses (called the Async card LAN link in Figure 2 "Typical IPE

analog line card architecture" (page 23)). The output bus is used by the

system controller for output of control data to the line card. The input bus is used by the system controller for input of line card status data.

A card LAN link bus is common to all of the line/trunk card slots within an IPE module. This bus is arranged in a master/slave configuration where the controller card is the master and all other cards are slaves. The module backplane provides each line/trunk card slot with a unique hardwired slot address. This slot address enables a slave card to respond when addressed by the controller card. The controller card communicates with only one slave at a time.

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26 Overview

Analog line interface units

In normal operation, the controller card continually scans (polls) all of the slave cards connected to the card LAN to monitor their presence and operational status. The slave card sends replies to the controller on the input bus along with its card slot address for identification. In its reply, the slave informs the controller if any change in card status has taken place. The controller can then prompt the slave for specific information. Slaves only respond when prompted by the controller; they do not initiate exchange of control or status data on their own.

When an IPE line card is first plugged into the backplane, it runs a self-test. When the self-test is completed, a properly functioning card responds to the next controller card poll with the self-test status. The controller then queries for card identification and other status information. The controller then downloads all applicable configuration data to the line card, initializes it, and puts it into an operational mode.

Once the 8-bit digital voice signal has been received by the analog line card, it must be converted back into an analog signal, filtered, converted from a 4-wire transmission path to a 2-wire transmission path, and driven onto the analog telephone line.

Figure 4 "Typical analog line interface unit block diagram" (page 27) shows

a typical example of the logic that performs these functions. Each part of the analog line interface unit is discussed in the following section.

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Figure 4 Typical analog line interface unit block diagram

Line cards 27

Coder/Decoder circuit

The Coder/Decoder (CODEC) performs Analog to Digital (A/D) and Digital to Analog (D/A) conversion of the line analog voiceband signal to and from a digital PCM signal. This signal can be coded and decoded using either the A-Law or the µ-Law companding algorithm.

On some analog line cards, the decoding algorithm depends of the type of CODEC installed when the board is built. On others, it is an option selected using a software overlay.

Variable gain filters

Audio signals received from the analog phone line are passed through a low-pass A/D monolithic filter that limits the frequency spread of the input signal to a nominal 200 to 3400 Hz bandwidth. The audio signal is then applied to the input of the CODEC. Audio signals coming from the CODEC are passed through a low-pass A/D monolithic filter that integrates the amplitude modulated pulses coming from the CODEC, and then filters and

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28 Overview

amplifies the result. On some of the line cards, the gain of these filters can be programmed by the system controller. This allows the system to make up for line losses according to the loss plan.

Balancing network

Depending on the card type, the balancing network provides a 600

/4, 3COM or 3CM2 impedance matching network. It also converts

900

/4,

the 2-wire transmission path (tip and ring) to a 4-wire transmission path (Rx/ground and Tx/ground). The balancing network is usually a transformer/analog (hybrid) circuit combination, but can also be a monolithic Subscriber Line Interface Circuit (SLIC) on the newer line cards.

Line interface and foreign voltage protection

The line interface unit connects the balancing network to the telephone tip and ring pairs. The off-premise line card (NT1R20) has circuitry that protects the line card from foreign voltage surges caused by accidental power line connections and lightning surges. This protection is necessary if the telephone line leaves the building where the switch is installed.

The line interface unit has a relay that applies the ringing voltage onto the phone line. See Figure 4 "Typical analog line interface unit block

diagram" (page 27). The RSYNC signal from the 20 Hz (nominal) ringing

voltage power supply is used to prevent switching of the relay during the current peak. This eliminates switching glitches and extends the life of the switching relay.

The off-hook detection circuit monitors the current draw on the phone line. When the current draw exceeds a preset value, the circuit generates an off-hook signal that is transmitted back to the system controller.

The message waiting circuit on message waiting line cards monitors the status of the message waiting signal and applies –150 V dc power to the tip lead when activated. This voltage is used to light the message waiting lamps on phones that are equipped with that feature. The high voltage supply is automatically disconnected when the phone goes off-hook. Newer line cards can sense when the message waiting lamp is not working and can report that information back to the system controller.

Digital line interface units

The NT8D02 Digital Line card provides voice and data communication links between a switch and modular digital telephones. These lines carry multiplexed PCM voice, data and signaling information as Time Compression Multiplexed (TCM) loops. Each TCM loop can be connected to a Nortel "Meridian Modular Digital" telephone.

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Line cards 29

The digital line interface card contains one or more digital line interface units. See Figure 5 "Digital line interface unit block diagram" (page 29). Each digital line interface unit contains a Digital Line Interface Circuit (DLIC). The purpose of each DLIC is to demultiplex data from the DS-30X Tx channel into integrated voice and data bitstreams and transmit those bitstreams as Bi-Polar Return to Zero, Alternate Mark Inversion (BPRZ-AMI) data to the TCM loop. It also does the opposite: receives BPRZ-AMI bitstreams from the TCM loop and multiplexes the integrated voice and data bitstream onto the DS-30X Rx channel.

The 4-wire to 2-wire conversion circuit converts the 2-wire tip and ring leads into a 4-wire (Tx and ground and RX and ground) signal that is compatible with the digital line interface circuit.

TCM loop interfaces

Each digital phone line terminates on the digital line card at a TCM loop interface circuit. The circuit provides transformer coupling and foreign voltage protection between the TCM loop and the digital line interface circuit. It also provides power for the digital telephone.

Figure 5 Digital line interface unit block diagram

To prevent undesirable side effects from occurring when the TCM loop interface cannot provide the proper signals on the digital phone line, the system controller can remove the ±15 V dc power supply from the TCM loop interface. This happens when either the card gets a command from the NT8D01 Controller card to shut down the channel, or when the digital line card detects a loss of the 1 KHz frame synchronization signal.

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Analog line call operation

Each TCM loop interface circuit can service loops up to 3500 ft. in length when using 24 gauge wire. The circuit allows for a maximum ac signal loss of 15.5 dB at 256 KHz and a maximum DC loop resistance of 210 ohms.

Signaling

The digital line interface units also contain signaling and control circuits that establish, monitor, and take down call connections. These circuits work with the system controller to operate the digital line interface circuits during calls. The circuits receive outgoing call signaling messages from the controller and return incoming call status information to the controller over the DS-30X network loop.

The applications, features, and signalling arrangements for each line interface unit are configured in software and implemented on the card through software download messages. When an analog line interface unit is idle, it provides a voltage near ground on the tip lead and a voltage near –48 V dc on the ring lead to the near-end station. (The near-end station is the telephone or device that is connected to the analog line card by the tip and ring leads.) An on-hook telephone presents a high impedance toward the line interface unit on the card.

Incoming calls

Incoming calls to a telephone that is connected to an analog line card can originate either from stations that are local (served by the PBX), or remote (served through the Public Switched Telephone Network (PSTN)). The alerting signal to a telephone is 20 Hz (nominal) ringing. When an incoming call is answered by the near-end station going off-hook, a low-resistance dc loop is placed across the tip and ring leads (towards the analog line card) and ringing is tripped. See Figure 6 "Call connection

sequence - near-end station receiving call" (page 31).

Outgoing calls

For outgoing calls from the near-end station, a line interface unit is seized when the station goes off-hook, placing a low-resistance loop across the tip and ring leads towards the analog line card. See Figure 7 "Call

connection sequence - near-end originating call" (page 32). When the card

detects the low-resistance loop, it prepares to receive digits. When the system is ready to receive digits, it returns dial tone. Outward address signaling is then applied from the near-end station in the form of loop (interrupting) dial pulses or DTMF tones.

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Figure 6 Call connection sequence - near-end station receiving call

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32 Overview

Figure 7 Call connection sequence - near-end originating call

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Message waiting

Line cards that are equipped with the message waiting feature receive notification that a message is waiting across the Card LAN link (IPE cards). On cards that drive a message waiting light, the light is turned on by connecting the ring side of the telephone line to the –150 V dc power supply. When the line card senses that the telephone has gone off-hook, it removes the –150 V dc voltage until the telephone goes back on-hook. Line cards that use an interrupted dial tone to indicate message waiting do nothing until the receiver is picked up. The line card then interrupts the dial tone at a regular interval to indicate that a message is waiting.

In both cases, the message waiting indication continues until the user checks his or her messages. At that time, the system cancels the message waiting indication by sending another message across the Card LAN link or network loop.

Analog line supervision

Analog line supervision features are used to extend the answer supervision and disconnect supervision signals when the line card is connected to an intelligent terminal device (Key system or intelligent pay phone). Two types of analog line supervision are provided:

• battery reversal answer and disconnect supervision

•

hook flash disconnect supervision

Battery reversal answer and disconnect supervision Battery reversal answer and disconnect supervision is only used for calls that originate from the terminal device. It provides both far-end answer supervision and far-end disconnect supervision signals to the terminal device. In an intelligent pay phone application, these signals provide the information necessary to accurately compute toll charges.

In the idle state, and during dialing and ringing at the far end, the line card provides a ground signal on the tip lead and battery on the ring lead. See

Figure 8 "Battery reversal answer and disconnect supervision sequence" (page 35). When the far-end answers, these polarities are reversed.

The reversed battery connection is maintained as long as the call is established. When the far-end disconnects, the system sends a message that causes the line card to revert the battery and ground signals to the normal state to signal that the call is complete.

Hook Flash disconnect supervision Hook flash disconnect supervision is only used for incoming calls that terminate at the terminal device (typically a Key system). See Figure 9 "Hook flash disconnect supervision

sequence" (page 36). The disconnect signal is indicated by the removal

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Digital line call operation

Lineside T1 and E1 call operation

of the ground connection to the tip lead for a specific length of time. The length of time is programmed in LD10, and ranges from a minimum of 10 milliseconds to a maximum of 2.55 seconds. See

Software Input/Output

Reference — Administration (NN43001-611) for more information.

Digital line call operation is controlled entirely by use of messages between the digital telephone and the system. These messages are carried across the TCM loop interface. There is no call connection sequence similar to the one used for analog telephone line operation.

The lineside T1/E1 card’s call operation is performed differently depending on whether the T1/E1 link is configured to process calls in loop start mode or ground start mode. Configuration is performed through dip switch settings on the lineside T1/E1 card.

The lineside T1/E1 card performs calls processing separately on each of its 24 channels. Signaling is performed using the "A/B robbed bit" signaling standard for T1/E1 communication.

A/B robbed bit signaling simulates standard analog signaling by sending a meaningful combination of ones and zeros across the line that correlates to the electrical impulses that standard analog signaling sends. For example, to represent that an analog line interface unit is idle, the analog line card provides a ground on the tip lead and –48Vdc on the ring lead. The lineside T1/E1 card accomplishes the same result by sending its A bit as 0 (translated as ground on the tip lead) and its B bit as 1 (translated as –48V dc on the ring lead). However, measuring the voltage of the ring lead on the T1/E1 line would not return –48V dc, since actual electrical impulses are not being sent.

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Figure 8 Battery reversal answer and disconnect supervision sequence

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Figure 9 Hook flash disconnect supervision sequence

Call operation is described by categorizing the operation into the following main states:

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• Idle (on-hook)

• Incoming calls

• Outgoing calls

•

Calls disconnected by the CO

• Calls disconnected by the telephone

Loop Start Mode

In Loop Start mode, the A and B bits meaning is:

•

Transmit from LTI:A bit = 0 (tip ground on); B bit = Ringing (0=on, 1=off)

• Receive to LTI: A bit = Loop (0=open, 1=closed); B bit = 1 (no ring

ground)

When a T1 channel is idle, the Lineside T1 card simulates a ground on the tip lead and –48Vdc on the ring lead to the terminal equipment by setting its transmit A bit to 0 and transmit B bit to 1. Accordingly, an on-hook channel on the terminal equipment simulates an open loop toward the Lineside T1 card, causing the Lineside T1 card’s receive bits to be set to A = 0 and receive B = 1.

Incoming calls Incoming calls to terminal equipment attached to the Lineside T1 card can originate either from stations that are local (served by the PBX), or remote (served through the PSTN). To provide the ringing signal to a telephone the Lineside T1 card simulates an additional 90V on the ring lead to the terminal equipment by alternating the transmit B bit between 0 and 1 (0 during ring on, 1 during ring off). When an incoming call is answered by the terminal equipment going off-hook, the terminal equipment simulates tripping the ringing and shutting off ringing, causing the Lineside T1 card’s receive A bit to be changed from 0 to 1.

Outgoing calls During outgoing calls from the terminal equipment, a channel is seized when the station goes off-hook. This simulates a low-resistance loop across the tip and ring leads toward the Lineside T1 card, causing the lineside T1’s receive A bit to be changed from 0 to

1. This bit change prepares the Lineside T1 to receive digits. Outward address signaling is then applied from the terminal equipment in the form of DTMF tones or loop (interrupting) dial pulses that are signaled by the receive A bit pulsing between 1 and 0.

Call disconnect from far end PSTN, private network or local Station When a call is in process, the central office may disconnect the

call from the CS 1000E, CS 1000M, and Meridian 1. If the Lineside T1 port has been configured with the supervised analog line (SAL) feature,

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the Lineside T1 card responds to the distant end disconnect message by momentarily changing its transmit A bit to 1 and then returning it to 0. The duration of time that the transmit A bit remains at 1 before returning to 0 depends upon the setting that was configured using the SAL. If the terminal equipment is capable of detecting distant end disconnect, it responds by changing the Lineside T1 card’s receive A bit to 0 (open loop).The call is now terminated and the interface is in the idle (on-hook) state.

For the Lineside T1 card to support distant end disconnect in loop start mode, the following configuration parameters must exist:

•

The Supervised Analog Line (SAL) feature must be configured for each Lineside T1 port.

Note:

loop start operation. This is configurable in 10 m/s increments.

By default, the SAL feature opens the tip side for 750 m/s in

• For outgoing trunk calls, the trunk facility must provide far end

disconnect supervision.

• In order to detect distant end disconnect for calls originating on the

Lineside T1 card, the battery reversal feature within the SAL software must be enabled. Enabling the battery reversal feature does not provide battery reversal indication but only provides a momentary interruption of the tip ground by asserting the A bit to 1 for the specified duration.

•

In order to detect distant end disconnect for calls terminating on the Lineside T1 card, the hook flash feature within the SAL software must be enabled.

•

In order to detect distant end disconnect for calls originating and terminating on the Lineside T1 card, both the battery reversal and hook flash features must be enabled within the SAL software.

Call disconnect from Lineside T1 terminal equipment Alternatively, while a call is in process, the terminal equipment may disconnect by going on-hook. The terminal equipment detects no loop current and sends signaling to the Lineside T1 card that causes its receive A bit to change from 1 to 0. The call is now released.

Table 3 "Loop Start Call Processing A/B Bit Settings" (page 39) outlines

the lineside T1’s A and B bit settings in each state of call processing.

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Table 3 Loop Start Call Processing A/B Bit Settings

Transmit Receive State ABAB Idle Incoming Calls:

• Idle

• Ringing is applied from Lineside T1 card

•

Terminal equipment goes off-hook

• Lineside T1 card stops ringing

Outgoing Calls:

• Idle

• Terminal equipment goes off-hook

Call Disconnect from far end:

•

Steady state (call in progress)

•

Far end disconnects by dropping loop current and Lineside T1 card changes Transmit A bit to 1 momentarily.

•

Terminal equipment responds causing Receive A bit to change to 0.

•

Lineside T1 responds by changing its Transmit A bit to 0. Call is terminated and set to idle state.

Call disconnect from terminal equipment:

•

Steady state (call in progress)

0101

0101 0

1/0

0111

0101 0111

0111 1111

1101

0101

0111

01 11

•

Terminal equipment goes on-hook causing the Receive A bit to change to 0. Call is terminated and set to idle state.

Ground Start Mode

In Ground Start mode, the A and B bits meaning is:

•

Transmit from LTI:A bit = Tip ground (0=grounded, 1=not grounded); B bit = Ringing (0=on, 1=off)

• Receive to LTI: A bit = Loop (0=open, 1=closed); B bit = Ring ground

(0=grounded, 1=not grounded)

When a T1 channel is idle, the Lineside T1 card simulates a ground on the tip lead and -48V dc on the ring lead to the terminal equipment by setting the transmit A bit to 1 and transmit B bit to 1. Accordingly, an on-hook telephone simulates an open loop toward the Lineside T1 card, causing the Lineside T1 card’s receive bits to be set to A = 0 and B = 1.

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Incoming Calls Incoming calls to terminal equipment that is connected

to the Lineside T1 card can originate either from stations that are local (served by the PBX), or remote (served through the public switched telephone network). To provide the ringing signal to the terminal equipment the Lineside T1 card simulates the 90V ring signal on the ring lead by alternating the transmit B bit between 0 and 1 (0 during ring on, 1 during ring off), and ground on the tip lead by setting the transmit A bit to 0. When an incoming call is answered (by the terminal equipment going off-hook), the terminal equipment simulates tripping the ringing and shutting off ringing by causing the lineside T1’s receive A bit to change from 0 to 1. The Lineside T1 card responds to this message by simulating loop closure by holding the transmit B bit constant at 1.

Outgoing Calls During outgoing calls from the terminal equipment, a channel is seized when the terminal equipment goes off-hook, simulating a ground to the ring lead toward the Lineside T1 card by causing the lineside T1’s receive B bit to change from 1 to 0. In turn, the Lineside T1 card simulates grounding its tip lead by changing the transmit A bit to 0. The terminal equipment responds to this message by removing the ring ground (lineside T1’s receive B bit is changed to 1) and simulating open loop at the terminal equipment (lineside T1’s receive A bit is changed to 0).

Call disconnect from far end PSTN, private network or local station While a call is in process, the far end might disconnect the call.

If the Lineside T1 port has been configured with the Supervised Analog Line (SAL) feature, the Lineside T1 responds to the distant end disconnect message by opening tip ground. This causes the Lineside T1 card to change the transmit A bit to 1. When the terminal equipment sees the transmit A bit go to 1, it responds by simulating open loop causing the lineside T1’s receive A bit to change to 0. The call is terminated and the interface is once again in the idle condition.

For the Lineside T1 card to support distant end disconnect in ground start mode, the following configuration parameters must exist:

• The Supervised Analog Line (SAL) feature must be configured for each

Lineside T1 port.

Note: By default, the SAL feature opens the tip side for 750 m/s in

loop start operation. This is configurable in 10 m/s increments.

• In order to detect distant end disconnect for calls originating on the

Lineside T1 card, the "battery reversal" feature within the SAL software must be enabled. Enabling the battery reversal feature does not provide battery reversal indication when a call is answered; it only provides battery reversal indication when a call is disconnected.

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• In order to detect distant end disconnect for calls terminating on the

Lineside T1 card, the "hook flash" feature within the SAL software must be enabled.

•

In order to detect distant end disconnect for calls originating and terminating on the Lineside T1 card, both the "battery reversal" and "hook flash" features within the SAL software must be enabled.

Call disconnect from Lineside T1 terminal equipment Alternatively, while a call is in process, the terminal equipment may disconnect by going on-hook, causing the lineside T1’s receive A bit to change to 0. The Lineside T1 card responds to this message by simulating the removal of ground from the tip by changing its transmit A bit to 1. The call is now terminated and the interface is once again in the idle condition.

Table 4 "Ground Start Call Processing A/B Bit Settings" (page 41) outlines

the lineside T1’s A and B bit settings in each state of call processing.

Table 4 Ground Start Call Processing A/B Bit Settings

Line cards 41

Transmit Receive State ABAB Idle Incoming Calls (to terminal equipment):

•

Idle

•

Ringing is applied from Lineside T1 card by simulating ground on tip lead and ringing on ring lead.

•

Terminal equipment goes off-hook by simulating ground on tip lead and ringing on ring lead.

Outgoing Calls (from terminal equipment):

•

Idle

•

Terminal equipment goes off-hook.

• The Lineside T1 simulates grounding its tip lead

• Terminal equipment opens ring ground and closes loop

Call Disconnect from far end:

• Steady state (call in progress)

• The Lineside T1 ungrounds tip

• Terminal equipment opens loop current

1101

1101 0

0/1

1101 1100 0100 0111

0111 1111 1101

Call disconnect from terminal equipment:

• Steady state (call in progress)

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Table 4 Ground Start Call Processing A/B Bit Settings (cont’d.)

Transmit Receive State ABAB

•

Terminal equipment goes open loop current

• Lineside T1 card opens tip ground

Ground Start Restrictions

If the Lineside T1 card is used in ground start mode, certain restrictions should be considered. Because the system treats the Lineside T1 card as a standard loop start analog line card, the ground start operation of the Lineside T1 card has operational limitations compared to typical ground start interface equipment relating to and glare potential.

Distant end disconnect restrictions If the SAL feature is not available in the CS 1000 software, the Lineside T1 card is not capable of indicating to the Customer Premise Equipment (CPE) when a call is terminated by the distant end. In this case, the Lineside T1 card continues to provide a grounded tip indication (A=0) to the CPE until it detects an open loop indication (A=0) from the CPE, at which time it provides an open tip indication (A=1). Therefore, without SAL software, the Lineside T1 card is not capable of initiating the termination of a call to the CPE.

With the SAL software configured for each Lineside T1 line, the Lineside T1 card provides an open tip indication to the CPE when it receives an indication of supervised analog line from the system. This provides normal ground start protocol call termination.

0101 1101

start of dialing, distant end disconnect

Glare restrictions In telephone lines or trunks, glare occurs when a call origination attempt results in the answering of a terminating call that is being presented by the far end simultaneously with the call origination attempt by the near end.

The Lineside T1 detects presentation of a terminating call (outgoing to Lineside T1 terminal equipment) by detecting ringing voltage. If application of the ringing voltage is delayed due to traffic volume and ringing generator capacity overload, the Lineside T1 ground start operation cannot connect the tip side to ground to indicate the line has been seized by the system.

In ground start mode, glare conditions need to be considered if both incoming and outgoing calls to the Customer Premise Equipment (CPE) are going to be encountered. If the system and the CPE simultaneously

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attempt to use a Lineside T1 line, the system completes the call termination. It does not back down and allow the CPE to complete the call origination, as in normal ground start operation.

If both incoming and outgoing calls are to be handled through the Lineside T1 interface, separate channels should be configured in the system and the CPE for each call direction. This eliminates the possibility of glare conditions on call origination.

Voice frequency audio level

The digital pad for Lineside T1 card audio level is fixed for all types of call connection (0 dB insertion loss in both directions), and differs from the analog line. Audio level adjustments, if required, must be made in the Lineside T1 terminal equipment.

Off-premise line protection

Off-premise applications are installations where the telephone lines are extended outside the building where the PBX system is housed, but the lines are not connected to public access facilities. This application is commonly referred to as a "campus installation."

Line cards 43

In off-premise applications, special protection devices and grounding are required to protect PBX and telephone components from any abnormal conditions, such as lightning strikes and power line crosses.

The NT1R20 Off-Premise Station Line card has built-in protection against lightning strikes and power line crosses. These should be the preferred cards for an off-premise application. Other cards can be used when external line protectors are installed.

When using the Lineside T1 card for an off-premise or network application, external line protectors must be installed. Install an isolated type Channel Service Unit (CSU) as part of the terminal equipment, to provide the necessary isolation and outside line protection. The CSU should be an FCC part 68 or CSA certified unit.

Line protectors

Line protectors are voltage-absorbing devices that are installed at the cross-connect terminals at both the main building and the remote building. The use of line protectors ensure that system and telephone components are not damaged from accidental voltages that are within the limit of the capacity of the protection device. Absolute protection from lightning strikes and other stray voltages cannot be guaranteed, but the use of line protection devices significantly reduces the possibility of damage.

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Nortel has tested line protection devices from three manufacturers. See

Table 5 "Line protection device ordering information" (page 44). Each

manufacturer offers devices for protection of digital as well as analog telephone lines.

Table 5 Line protection device ordering information

Device order code

Analog Line Digital Line Manufacturer

UP2S-235 UP2S-75 ITW Linx Communication

201 Scott Street Elk Grove Village, IL 60007 (708) 952-8844 or (800) 336-5469

6AP 6DP Oneac Corporation

27944 North Bradley Road Libertyville, IL 60048-9700 (800) 553-7166 or (800) 327-8801 x555

ESP-200 ESP-050 EDCO Inc. of Florida

1805 N.E. 19th Avenue P.O. Box 1778 Ocala, FL 34478 (904) 732-3029 or (800) 648-4076

These devices are compatible with 66 type M1-50 split blocks or equivalent. Consult the device manufacturer if more specific compatibility information is required.

Line protection grounding

In conjunction with line protectors, proper system (PBX) grounding is essential to minimize equipment damage. Nortel recommends following the grounding connection requirements as described in

Communication Server 1000M and Meridian 1 Large System Installation and Commissioning, . This requirement includes connecting the ground for

the protection devices to the approved building earth ground reference. Any variances to these grounding requirements could limit the functionality of the protection device.

Line and telephone components

Because testing of the line protectors was limited to the line cards and telephones shown below, only these components should be used for off-premise installations.

Telephones

• Meridian Modular Telephones (digital)

• Meridian Digital Telephones

• Standard analog (500/2500-type) telephones

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Line cards

• NT1R20 Off-Premise Station Line card

• NT8D02 Digital Line card

Trunk cards

The following trunk cards are designed using the IPE architecture, and are recommended for use in all new system designs.

Each of the trunk cards was designed to fit a specific system need. Use

Table 6 "Trunk card characteristics" (page 45) to select the trunk card that

meets system needs.

Table 6 Trunk card characteristics

Trunk cards 45

Part Number Description

NT8D14 Universal Trunk card

NT8D15 E and M Trunk card

NTCK16 Generic Central Office

Trunk card

* Central office (CO), Foreign Exchange (FX), and Wide Area Telephone Service (WATS) trunks.

Trun

ks Trunk Types

CO/FX/WATS trunks*, direct inward dial trunks, TIE trunks, Loop Dial Repeating trunks Recorded Announcement trunks, Paging trunks

2-wire E and M Trunks, 4-wire E and M Trunks, 4-wire DX trunks, Paging trunks

CO trunks IPE

Architect

ure

IPE

NT8D14 Universal Trunk card

The NT8D14 Universal Trunk card is an intelligent four-channel trunk card that is designed to be used in a variety of applications. It supports the following five trunk types:

• Central office (CO), Foreign Exchange (FEX), and Wide Area

Telephone Service (WATS) trunks

• Direct Inward Dial (DID) trunks

• TIE trunks: two-way Loop Dial Repeating (LDR) and two-way loop

Outgoing Automatic Incoming Dial (OAID)

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• Recorded Announcement (RAN) trunks

• Paging (PAG) trunks

The universal trunk card also supports Music, Automatic Wake Up, and Direct Inward System Access (DISA) features.

NT8D15 E and M Trunk card

The NT8D15 E and M Trunk card is an intelligent four-channel trunk card that is designed to be used when connecting to the following types of trunks:

• 2-wire E and M Type I signaling trunks

•

4-wire E and M Trunks with:

—

Type I or Type II signaling

— Duplex (DX) signaling

•

Paging (PAG) trunks

The trunk type and function can be configured on a per port basis. Dialing outpulsing is provided on the card. Make and break ratios are defined in software and downloaded by software commands.

Installation

NTCK16 Generic Central Office Trunk card

The NTCK16 generic central office trunk cards support up to eight analog central office trunks. They can be installed in any IPE slot that supports IPE. The cards are available with or without the Periodic Pulse Metering (PPM) feature. The cards are also available in numerous countries.

This section provides a high-level description of how to install and test trunk cards.

IPE trunk cards can be installed in any IPE slot of the NT8D37 IPE module. Figure 10 "IPE trunk cards installed in an NT8D37 IPE module"

(page 47) shows where an IPE trunk card can be installed in an NT8D37

IPE module. When installing trunk cards, these general procedures should be used:

Procedure 1 Installing a trunk card

Step Action 1 Configure the jumpers and switches on the trunk card (if any) to

meet the system needs.

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2 Install the trunk card into the selected slot.

Figure 10 IPE trunk cards installed in an NT8D37 IPE module

3 Install the cable that connects the backplane connector on the

IPE module to the module I/O panel.

Operation 47

Operation

4 Connect a 25-pair cable from the module I/O panel connector to

the Main Distribution Frame (MDF).

5 Connect the trunk card output to the selected terminal equipment

at the MDF.

6 Configure the individual trunk interface unit using the Trunk

Administration program (LD 14) and the Trunk Route Administration program (LD 16).

--End--

Once these steps are complete, the trunk card is ready for use.

This section describes how trunk cards fit into the CS 1000E, CS 1000M, and Meridian 1architecture, the buses that carry signals to and from the trunk cards, and how they connect to terminal equipment. See Table 7

"Differences between IPE parameters" (page 48) for IPE parameters.

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Host interface bus

Cards based on the IPE bus use a built-in microcontroller. The IPE microcontroller is used for the following:

• to perform local diagnostics (self-test)

• to configure the card according to instructions issued by the system

processor

•

to report back to the system processor information such as card identification (type, vintage, and serial number), firmware version, and programmed configuration status.

Table 7 Differences between IPE parameters

Parameter IPE

Card Dimensions 31.75 x 25.4 x 2.2 cm. (12.5 x10.0 x 0.875 in.) Network Interface DS-30X Loops Communication Interface card LAN Link Microcontroller

8031 Peripheral Interface card NT8D01 Controller card Network Interface card NT8D04 Superloop Network card Modules NT8D37 IPE module

Intelligent Peripheral Equipment

IPE trunk cards all share a similar architecture. Figure 11 "Typical

IPE trunk card architecture" (page 49) shows a typical IPE trunk card

architecture. The various trunk cards differ only in the number and types of trunk interface units.

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Figure 11 Typical IPE trunk card architecture

Operation 49

The switch communicates with IPE modules over two separate interfaces. Voice and signaling data are sent and received over DS-30X loops and maintenance data is sent over a separate asynchronous communication link called the card LAN link.

Signaling data is information directly related to the operation of the telephone line. Some examples of signaling commands are as follows:

• off hook/on hook

• ringing signal on/off

• message waiting lamp on/off

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Maintenance data is data relating to the configuration and operation of the IPE card, and is carried on the card LAN link. Some examples of maintenance data are as follows:

• polling

• reporting of self-test status

• CPU initiated card reset

•

reporting of card ID (card type and hardware vintage)

• reporting of firmware version

• downloading trunk interface unit configuration

• reporting of trunk interface unit configuration

•

enabling/disabling of the DS-30X network loop bus

• reporting of card status

DS-30X loops The interfaces provided by the line and trunk cards connect to conventional 2-wire (tip and ring) line facilities. IPE analog line and trunk cards convert the incoming analog voice and signaling information to digital form, and route it to the Common Equipment (CE) CPU over DS-30X network loops. Conversely, digital voice and signaling information from the CPU is sent over DS-30X network loops to the analog line and trunk cards where it is converted to analog form and applied to the line or trunk facility.

IPE digital line cards receive the data from the digital phone terminal as 512 kHz Time Compressed Multiplexed (TCM) data. The digital line card converts that data to a format compatible with the DS-30X loop, and transmits it in the next available timeslot. When a word is received from the DS-30X loop, the digital line card converts it to the TCM format and transmits it to the digital phone terminal over the digital line facility.

A separate dedicated DS-30X network loop is extended between each IPE line/trunk card and the controller cards within an IPE module (or the controller circuits on a network/DTR card in a CE module). A DS-30X network loop is composed of two synchronous serial data buses. One bus transports in the transmit (Tx) direction toward the line facility and the other in the receive (Rx) direction toward the common equipment.

Each bus has 32 channels for pulse code modulated (PCM) voice data. Each channel consists of a 10-bit word. See Figure 12 "DS-30X loop data

format" (page 51).

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Eight of the 10 bits are for PCM data, one bit is the call signaling bit, and the last bit is a data valid bit. The 8-bit PCM portion of a channel is called a the 5.12 MHz clock frequency supplied by the controller card). The timeslot repetition rate for a single channel is 8 kHz. The controller card also supplies a locally generated 1 kHz frame sync signal for channel synchronization.

Figure 12 DS-30X loop data format

Operation 51

timeslot . The DS-30X loop is clocked at 2.56 Mbps (one-half

DS-30Y network loops extend between controller cards and superloop network cards in the common equipment, and function in a manner similar to DS-30X loops. See Figure 13 "Network connections to IPE modules"

(page 52).

Essentially, a DS-30Y loop carries the PCM timeslot traffic of a DS-30X loop. Four DS-30Y network loops form a superloop with a capacity of 128 channels (120 usable timeslots).

See Communication Server 1000M and Meridian 1 Large System Planning and Engineering (NN43021-220) for more information on superloops.

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52 Overview

Card LAN link Maintenance communication is the exchange of control

and status data between IPE line or trunk cards and the CE CPU by way of the NT8D01 Controller Card. Maintenance data is transported via the card LAN link. This link is composed of two asynchronous serial buses (called the Async card LAN link in Figure 11 "Typical IPE trunk card

architecture" (page 49)). The output bus is used by the controller for output

of control data to the trunk card.The input bus is used by the controller for input of trunk card status data.

Figure 13 Network connections to IPE modules

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Operation 53

A card LAN link bus is common to all of the line/trunk card slots within an IPE module (or IPE section of a CE module). This bus is arranged in a master/slave configuration where the controller card is the master and all other cards are slaves. The module backplane provides each line/trunk card slot with a unique hardwired slot address. This slot address enables a slave card to respond when addressed by the controller card. The controller card communicates with only one slave at a time.

In normal operation, the controller card continually scans (polls) all of the slave cards connected to the card LAN to monitor their presence and operational status. The slave card sends replies to the controller on the input bus along with its card slot address for identification. In this reply, the slave informs the controller if any change in card status has taken place. The controller can then prompt the slave for specific information. Slaves only respond when prompted by the controller; they do not initiate exchange of control or status data on their own.

When an IPE line or trunk card is first plugged into the backplane, it runs a self-test. When the self test is completed, a properly functioning card responds to the next controller card poll with the self-test status. The controller then queries for card identification and other status information. The controller then downloads all applicable configuration data to the line/trunk card, initializes it, and puts it into an operational mode.

The network card regularly polls the IPE cards during TS0 to see if any of them has a message to be sent. When an IPE card has a message waiting it responds to the poll by sending a series of 1s during the next five successive timeslot 0s. The network card responds by sending a "message send enable" message (all 1s). The IPE card replies by sending 1, 1, 1, 0, and then the message in successive timeslot 0s.

Trunk interface unit

Once the 8-bit digital voice signal has been received by the trunk card, it must be converted back into an analog signal, filtered, and driven onto the analog trunk line through an impedance matching and balance network. The trunk interface also includes the logic necessary to place outgoing call signaling onto the trunk, or the logic to connect to special services such as recorded announcement and paging equipment.

Figure 14 "Typical trunk interface unit block diagram" (page 54) shows a

typical example of the logic that performs these functions. Each part of the trunk interface unit is discussed in the following section.

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54 Overview

Figure 14 Typical trunk interface unit block diagram

Coder/Decoder circuit The coder/decoder (codec) performs Analog

to Digital (A/D) and Digital to Analog (D/A) conversion of the line analog voiceband signal to and from a digital PCM signal. This signal can be coded and decoded using either the A-Law or the µ-Law companding algorithm. On some trunk cards the decoding algorithm depends of the type of codec installed when the board is built. On others, it is an option selected using a software overlay.

Variable gain filters Audio signals received from the analog phone trunk are passed through a low-pass A/D monolithic filter that limits the frequency spread of the input signal to a nominal 200–3400 Hz bandwidth. The audio signal is then applied to the input of the codec. Audio signals coming from the CODEC are passed through a low-pass A/D monolithic filter that integrates the amplitude modulated pulses coming from the CODEC, and then filters and amplifies the result.

On some of the trunk cards, the gain of these filters can be programmed by the system controller. This allows the system to make up for line losses according to the loss plan.

Balancing network Depending on the card type, the balancing network is capable of providing either a 600 ohm or a 900 ohm (or both) impedance matching network. It also converts the 2-wire transmission path

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(tip and ring) to a 4-wire transmission path (Rx/ground and Tx/ground). The balancing network is a transformer/analog (hybrid) circuit combination.

Signaling circuits Signaling circuits are relays that place outgoing call signaling onto the trunk. Signal detection circuits monitor the incoming call signaling.

Control signals Control signals and logic are provided when the trunk is going to be connected to special services such as recorded announcement and paging equipment.

Serial Data Interface (SDI) cards

The NT8D41BA QSDI paddle board provides four bidirectional asynchronous serial ports for the system processor, and the QPC841 QSDI card also provides four. Any device that conforms to the RS-232-C serial communication standard can be connected to these serial ports.

The electrical interface uses either standard RS-232-C signals or a special high-speed interface that combines the high-speed differential interface of the RS-422-A standard with the handshake signals of the RS-232-C standard.

Serial Data Interface (SDI) cards 55

The RS-232-C interface is normally used when data rates are less than 19.2 Kbps, and the cable length is less than 15.24 m (50 ft). The high-speed interface is used when the signal rates are greater than 19.2 kbps (up to 64 kbps) and/or when the cable length is greater than 15.24 m (50 ft).

Table 8 "Serial data interface cards" (page 55) shows compatibility

between the three SDI cards and the various switch options.

Table 8 Serial data interface cards

Card

NT8D41BA QPC841

Ports Port types

4 4

The NT8D41BA QSDI paddle board does not use a front panel. It mounts to the rear of the backplane in the NT5D21 Core/Network module, and does not consume a module slot. The RS-232-C connections are brought out through special cables to the backplane I/O panel.

Compatible System Options

51C, 61C 81C

RS-232-C asynchronous X X RS-232-C asynchronous X X

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56 Overview

Uses

Features

The QPC841 Quad SDI card mounts in standard backplane slots and its serial interface connectors are located on the card front panels. A list of the modules that can be mounted in is given in the section on the individual card.

Examples of asynchronous devices that can be connected to the system processor using the NT8D41BA QSDI paddle board and the QPC841 Quad SDI card are:

•

an administration and maintenance terminal

• a background terminal for use in a hotel/motel

• the Automatic Call Distribution (ACD) feature

• the Call Detail Recording (CDR) feature

The NT8D41 QSDI paddle board and the QPC841 QSDI card provide the following features:

• asynchronous serial data interface ports, each supporting

— RS-232-C interface — — Asynchronous, start-stop operation — — —

•

enable/disable switch and LED

•

input/output (I/O) device address selectable by on-board switches.

Speciﬁcations

This section lists the specifications shared by all of the SDI cards. See the appropriate section in this document for information specific to any particular card.

Power consumption

The SDI cards obtain their power directly from the module backplane. Power consumption for each of the cards is shown in Table 9 "Power

consumption" (page 57).

8–bit ASCII data with parity and stop bit

Data rates of 150, 300, 600, 1200, 2400, 4800, and 9600 baud Data terminal equipment (DTE) emulation mode Data communication equipment (DCE) emulation mode

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Table 9 Power consumption

Serial Data Interface (SDI) cards 57

Maximum power consumption

Voltage

+5 VDC ±5% 1.0 Amp 1.5 Amp +12 VDC ±5% 100 mA 100 mA –12 VDC ±5% 100 mA 100 mA

NT8D41BA

QPC841

Environmental

The SDI cards operate without degradation under the conditions listed in

Table 10 "Environmental specifications" (page 57).

Table 10 Environmental specifications

Specification Operation Storage



Ambient temperature

Relative humidity

(non-condensing)

Altitude



to 50

to 122



(32

5% to 95% 0% to 95%

3500m;

(11000 ft)



–55



(–58

15000m;

(50000 ft)

to +70C;

to 158F)

Electrostatic discharge

The SDI cards meet the requirements of the IEC 801-2, clause 8.0 procedure. They can withstand a direct discharge of ±5 to ±20 kV without being damaged.

Electromagnetic interference

The CS 1000E, CS 1000M, and Meridian 1systems meet the requirements of FCC Part 15 and CSA C108.8 electromagnetic interference (EMI) standards as a class "A" computing device. To accomplish this, the SDI cables must exit the module through EMI filters on the I/O panel.

Reliability

The Mean Time Between Failure (MTBF) for all SDI cards is 55 years at 40¡C and 29 years at 55¡C.

Installation

To use a serial data interface card in a CS 1000E, CS 1000M, or Meridian 1system, first install the card in the system, and then configure the system software to recognize it. These steps are discussed in the following sections.

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Maintenance

Instructions for cabling the serial data interface cards to the various system consoles and peripherals are found in Communication Server 1000M and Meridian 1 Large System Installation and Configuration (NN43021-310).

Configuring the system software

Once an SDI card has been installed in the system, the system software needs to be configured to recognize it. This is done using the Configuration Record program LD 17. Instructions for the Configuration Record program are found in Software Input/Output Reference — Administration (NN43001-611).

The following maintenance programs are used to maintain individual SDI asynchronous ports. The program used depends on the application of the port.

•

LD 37 Input/Output Diagnostics – Used for system terminal, printer, background terminal ports, and system monitor status.

•

LD 42 Call Detail Recording (CDR) Diagnostic – For checking CDR

links and CDR system terminals.

The following maintenance program is used to maintain individual SDI synchronous ports.

•

LD 48 Link Diagnostic – For checking Automatic Call Distribution

(ACD) and Meridian Link ports.

Instructions for running the various maintenance programs are found in Software Input/Output Reference — Administration (NN43001-611). System messages are interpreted in Software Input/Output Reference — System Messages (NN43001-712).

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Circuit card installation

Contents

This section contains information on the following topics:

“Card slots - Large System” (page 59) “Circuit and installation” (page 60) “Precautions” (page 63) “Installing a circuit card” (page 64)

Card slots - Large System

The following table in this chapter identifies card slot compatibility in the following modules:

• NT4N41 Core/Network module required for CS 1000M SG, CS 1000M

MG, Meridian 1 PBX 61CCall Processor (CP) PII, CP PIV, and Meridian 1 PBX 81C

•

NT4N46 Core/Network module required for CS 1000M MGand Option 81C CP PII, CP PIV

•

NT6D60 Core/Network module required for the CS 1000M MGand Option 81C only

•

NT8D35 Network module required for CS 1000M MGand Meridian 1 PBX 81C

• NT8D37 Intelligent Peripheral Equipment (IPE) module required for

CS 1000M HG, CS 1000M SG, CS 1000M MG, Meridian 1 Option 51, Meridian 1 PBX 61C, and Meridian 1 PBX 81C

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Circuit and installation

Table 11 Large Systemcard slots

Component Large System

A0786611 Call Processor Pentium II®card

81C Core/Net: "CP"

A0810486 Call Processor Pentium II 81C Core/Net: "CP" NT1P61 Fiber Superloop Network card Core/Net: 0–7 NT1P62 Fiber Peripheral Controller card IPE: "Contr" NT1R52 Remote Carrier Interface IPE: "Contr" NT1R20 Off-Premise Station IPE: any slot but "Contr" NT4D18 Hybrid Bus Terminator Core/Net: between 11 and 12 NT4D19 and NT423 Hybrid Bus Terminator Core/Net: between 0 and 1 NT4D20 and NT422 Hybrid Bus Terminator Core/Net: between 1 and 2 NT4N43 Multi-Medium DIsk Unit 81C Core/Net: NT4N64 Call Processor Pentium II card 61C Core/Net: CP PII NT4N64 Call Processor Pentium II card 81C Core/Net: CP PII NT4N39 Call Processor Pentium IV card 61C Core/Net: CP PIV NT4N39 Call Processor Pentium IV card 81C Core/Net: CP PIV

NT4N65 cPCI

Core to Network Interface card

NT4N66 cPCI Core to Network Interface

81C Core/Net: c9–c12 81C Core/Net cPCI Core backplane: 9–12

Transition card NT4N67 System Utility card 81C Core/Net: c15 NT4N68 System Utility Transition card 81C Core/Net cPCI Core backplane: NT5D11 and

IPE: any slot but "Contr"

NT5D14 Line side T1 Line card NT5D12 Dual DTI/PRI card Core/Net: 0–7 NT5D61 Input/Output Disk Unit with CD-ROM

61C Core/Net: 17, 18 and 19

(MMDU) NT5K02 Analog Line card IPE: any slot but "Contr" NT5K07 Universal Trunk card IPE: any slot but "Contr" NT5K17 Direct Dial Inward Trunk card IPE: any slot but "Contr" NT5K18 Central Office Trunk card IPE: any slot but "Contr" NT5K19 E and M Trunk card IPE: any slot but "Contr" NT5K35 D-channel Handler Interface Core/Net: 0-7

Net: 5-12

NT5K36 Direct Inward/Direct Outward Dial

IPE: any slot but "Contr"

Trunk card

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Table 11 Large Systemcard slots (cont’d.)

Component Large System

NT5K70 Central Office Trunk card IPE: any slot but "Contr" NT5K71 Central Office Trunk card IPE: any slot but "Contr" NT5K72 E and M Trunk card IPE: any slot but "Contr" NT5K82 Central Office Trunk card IPE: any slot but "Contr" NT5K83 E and M Trunk card IPE: any slot but "Contr" NT5K84 Direct Inward Dial Trunk card IPE: any slot but "Contr" NT5K90 Central Office Trunk card IPE: any slot but "Contr" NT5K93 Central Office Trunk card IPE: any slot but "Contr" NT5K96 Analog Line card IPE: any slot but "Contr" NT5K99 Central Office Trunk card IPE: any slot but "Contr" NT5K20 Extended Tone Detector IPE: any slot but "Contr" NT6D65 Core to Network Interface 61C Core/Net: 12 NT6D66 Call Processor card 61C Core/Net: 15 and 16

Circuit and installation 61

NT6D70

IPE: any slot but "Contr"

S/T Interface Line card NT6D71

IPE: any slot but "Contr"

U Interface Line card NT6D72 Basic Rate Signal Concentrator card IPE: any slot but "Contr" NT6D73

Core/Net: 0–7

Multi-purpose ISDN Signaling Processor card NT6D80 MSDL Core/Net: 0–7 NT7D16 Data Access card IPE: any slot but "Contr" NT7R51 Local Carrier Interface Core/Net: 0–7 NT8D01 Controller card IPE: "Contr" NT8D02 Digital Line card IPE: any slot but "Contr" NT8D04 Superloop Network card Core/Net: 0–7

Net: 5-12 NT8D09 Analog Message Waiting Line card IPE: any slot but "Contr" NT8D14 Universal Trunk card IPE: any slot but "Contr" NT8D15 E and M Trunk card IPE: any slot but "Contr" NT8D16 Digitone Receiver card IPE: any slot but "Contr" NT8D17 Conference/TDS card Core/Net: 0–7 NT8D41 Dual Port Serial Data Interface card Serial Port back of Core/Net module

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Table 11 Large Systemcard slots (cont’d.)

Component Large System

NT9D19 Call Processor card 61C Core/Net: 15 and 16 NTAG03 Central Office Trunk card IPE: any slot but "Contr" NTAG04 Central Office/Direct Inward Dial Trunk

IPE: any slot but "Contr" card

NTAG36 Nortel Integrated Recorded Announcer IPE: any slot but "Contr" NTBK51 Downloadable D-channel

Connects to DDP card daughterboard

NTCK16 Generic Central Office Trunk card IPE: any slot but "Contr" NTCK43AA Primary Rate Interface card Core/Net: 0-7

Net: 5-11, 13-14 NTRB33 FIber Junctor Interface card For 81C: Core/Net: 8 and 9, Net module: 2 and

3 NTRE39 Optical Cable Management card For 81C: Net module: the slot to the right side

of 14, the slot to the left of the 3PE in slot 1 QPC43 Peripheral Signaling card Core/Net: 10

Net: 4 QPC71 E&M/DX Trunk card IPE: any slot but "Contr" QPC414 Network card Core/Net: 0–7

Net: 5-12 QPC441 3-Port Extender card Core/Net: 11

Net: 1 QPC471 Clock Controller card 61C Core/Net: 9

Net: 5 -12

For 81C, use NT8D35 Net slot 13; in QSD39

shelf, use Net slot 2; in QSD40 shelf, use slot

13 QPC578 Integrated Services Digital Line card IPE: any slot but "Contr" QPC659 Dual Loop Peripheral Buffer card IPE: "DLB" QPC720 Primary Rate Interface card Core/Net: 0–7

Net: 5–11, 13–14 QPC775 Clock Controller 61C Core/Net: slot 14.

For 81C use NT8D35 Net slot 13; in QSD39

shelf, use Net slot 2; in QSD40 shelf, use slot

13.

QPC789 16-Port 500/2500 Message Waiting

IPE: any slot but "Contr" Line card

QPC841 4-Port Serial Data Interface card Core/Net: 0-7

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Precautions

Precautions 63

To avoid personal injury and equipment damage, review the following guidelines before handling system equipment.

WARNING

Module covers are not hinged; do not let go of the covers. Lift covers away from the module and set them out of your work area.

WARNING

Circuit cards may contain a lithium battery. There is a danger of explosion if the battery is incorrectly replaced. Do not replace components on any circuit card; you must replace the entire card.

Dispose of circuit cards according to the manufacturer’s instructions.

To avoid damage to circuit cards from static discharge, wear a properly connected antistatic wrist strap when you work on system equipment. If a wrist strap is not available, regularly touch one of the bare metal strips in a module to discharge static. Figure 15 "Static discharge points" (page

64) shows the recommended connection points for the wrist strap and the

bare metal strips you should touch. Handle circuit cards as follows:

• Unpack or handle cards away from electric motors, transformers, or

similar machinery.

• Handle cards by the edges only. Do not touch the contacts or

components.

• Set cards on a protective antistatic bag. If an antistatic bag is not

available, hand-hold the card, or set it in a card cage unseated from the connectors.

• Store cards in protective packing. Do not stack cards on top of each

other unless they are packaged.

• Keep cards installed in the system as much as possible to avoid dirty

contacts and unnecessary wear.

• Store cards in a cool, dry, dust-free area.

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64 Circuit card installation

Figure 15 Static discharge points

During repair and maintenance procedures do the following:

• Turn off the circuit breaker or switch for a module power supply before

the power supply is removed or inserted.

• In AC-powered systems, capacitors in the power supply must

discharge. Wait five full minutes between turning off the circuit breaker and removing the power supply from the module.

• Software disable cards, if applicable, before they are removed or

inserted.

• Hardware disable cards, whenever there is an enable/disable switch,

before they are removed or inserted.

• Return defective or heavily contaminated cards to a repair center. Do

not try to repair or clean them.

Installing a circuit card

This procedure provides detailed installation instructions for circuit cards.

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Installing a circuit card 65

DANGER

To avoid personal injury and equipment damage, read all of the guidelines in “Circuit and installation” (page 60) before you begin installation and follow all guidelines throughout the procedure.

Procedure 2 Installing a circuit card

Step Action 1 Open the protective carton and remove the circuit card from the

antistatic bag. Return the antistatic bag to the carton and store it for future use.

2 Inspect the card components, faceplate, locking devices,

and connectors for damage. If damaged, tag the card with a description of the problem and package it for return to a repair center.

3 Refer to the work order to determine the module and slot location

for the card.

4 If there is an enable/disable (Enb/Dis) switch on the faceplate,

set it to Dis.

5 If there are option switches or jumpers on the card, set them

according to the work order (see “Option settings” (page 79)).

CAUTION

System Failure

Incorrectly set switches on common equipment circuit cards may cause a system failure.

6 Squeeze the ends of the locking devices on the card and pull

the tabs away from the latch posts and faceplate (see Figure 16

"Installing the circuit card in the card cage" (page 66)).

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66 Circuit card installation

Figure 16 Installing the circuit card in the card cage

7 Insert the card into the card aligning guides in the card cage.

Gently push the card into the slot until you feel resistance. The tip of the locking device must be behind the edge of the card cage (see Figure 16 "Installing the circuit card in the card cage"

(page 66)).

8 Lock the card into position by simultaneously pushing the ends

of the locking devices against the faceplate.

Note: When IPE cards are installed, the red LED on the faceplate remains lit for two to five seconds as a self-test runs. If the self-test is completed successfully, the LED flashes three times and remains lit until the card is configured and enabled in software, then the LED goes out. If the LED does not follow the pattern described or operates in any other manner (such as continually flashing or remaining weakly lit), replace the card.

9 If there is an enable/disable switch, set it to Enb.

Note: Do not enable the switch on an NT8D04 Superloop Network card or QPC414 Network card until network loop cables are installed.

10 If you are adding a voice, conference, or tone and digit loop,

press the manual initialize (Man Int) button on the NT5D03 or the

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Installing a circuit card 67

NT5D10 Call Processor if the card is associated with the active Call Processor:

Note: An initialization causes a momentary interruption in call processing.

11 If you are installing the card in a working system, refer to the

work order and the technical document, Software Input/Output Reference — Administration (NN43001-611) to add the required office data to the system memory.

12 Go to the appropriate test procedure in “Acceptance tests” (page

69).

--End--

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Acceptance tests

Contents

This section contains information on the following topics:

“Introduction” (page 69) “Conference cards” (page 69) “Digitone receiver cards” (page 72) “Line cards” (page 72) “Multifrequency sender cards” (page 73) “Multifrequency signaling cards” (page 74) “Network cards” (page 74)

“Trunk cards” (page 75) “Tone and digit switch cards” (page 76)

Introduction

Test procedures for most circuit cards require that internal and external cabling be installed. See the appropriate installation document for your system and Telephones and Consoles Fundamentals (NN43001-567) for cabling procedures.

Conference cards

Procedure 3 Testing conference cards

Step Action

Use this procedure to test a conference card or to test the conference function of an NT8D17 Conference/TDS card.

1 Log into the system:

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70 Acceptance tests

2 Request the status of a loop on the conference card:

3 If the conference card loop is disabled, enable it.

LOGI (password)

LD 38 STAT loop

Conference status is formatted as follows:

CNFC n DSBL n BUSY

"n" represents the number of conference groups disabled and busy

CHAN n DSBL n BUSY

"n" represents the number of channels disabled and busy

UNEQ

card is not equipped in the system DSBL card is disabled in software

For an NT8D17 Conference/TDS card, enter:

ENLX loop

(the conference loop is the odd loop of the conference/TDS loop pair)

Note: The conference/TDS card is not enabled automatically when it is inserted. You must enable the card with the command ENLX. (This command is used in LD 34 and LD 46 to address even loops and in LD 38 to address odd loops.) Enabling the loops with the command ENLL does not enable the hardware for the card.

For other than an NT8D17 Conference/TDS card, enter:

ENLL loop

(the conference loop must be an even loop for cards other than the NT8D17)

If the system response is other than OK, seeSoftware Input/Output Reference — Administration (NN43001-611) to analyze the messages.

4 Test the conference loop for channel, group, and switching

faults: CNFC loop If the conference loop passes the tests, the output is OK. If the system response is other than OK, see Software

Input/Output Reference — Administration (NN43001-611) to analyze the messages.

5 Prepare the system for a manual conference call on a specified

loop:

CNFC MAN loop c

Where "c" is the manual conference group (1-15)

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Conference cards 71

A manual conference test is performed by stepping through conference channels and groups, listening for noise that indicates a faulty card.

The manual conference test can be performed through a system terminal or BCS maintenance telephone. If commands are entered from a maintenance telephone, this telephone automatically becomes part of the manual conference call.

Only one manual conference call is allowed at one time. A manual conference consists of only two telephones, where one telephone acts as a signal source while the other acts as a listening monitor.

After you enter the CNFC command, any two telephones (one may already be the maintenance telephone) dialing the special service prefix code (SPRE) and the digits 93 enters the manual conference call. The prime directory number (PDN) indicator, if equipped, lights on each telephone.

Going on-hook takes the telephone out of the manual conference call, and the test must be restarted.

See LD 38 in

Software Input/Output Reference — Administration

(NN43001-611) for more detailed information on using this command.

6 Test various channels and conference groups audibly with the

command

CNFC STEP

When stepping through channels and groups, a clicking followed by silence is normal. Any distortion or other noises indicates a faulty card.

Once the CNFC STEP command has been entered, entering C on the system terminal or maintenance telephone steps through the conference channels. Entering G steps through the conference groups. There are 15 channels per group and 15 groups per conference card.

Entering an asterisk (*) and END stops the test. Again, see "LD 38" in the Software Input/Output Reference —

Maintenance (NN43001-711) for detailed information on using this command.

7 End the session in LD 38:

****

--End--

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72 Acceptance tests

Digitone receiver cards

Note: The DTR daughterboard connected to a QPC659 Dual Loop

Peripheral Buffer card cannot be assigned when the IPE shelf is used in single loop mode.

Procedure 4 Testing digitone receiver cards

Step Action

Use this procedure to test a Digitone receiver (DTR) card, a DTR daughterboard, or the DTR function on the NT8D18 Network/DTR card.

1 Log into the system:

LOGI (password)

2 See if the Digitone receiver to be tested is disabled: LD 34

STAT

The system responds with the terminal number (TN), or numbers, of any disabled Digitone receivers.

3 If the Digitone receiver is disabled, enable it:

ENLR l s c uloop, shelf, card, and unit numbers

Line cards

4 Test the Digitone receiver:

DTRlsculoop, shelf, card, and unit numbers If the system response is other than OK, seeSoftware

Input/Output Reference — Administration (NN43001-611) to analyze the messages.

5 End the session in LD 34:

****

--End--

Procedure 5 Testing line cards

Step Action

Use this procedure to test a line card.

1 Log into the system:

LOGI (password)

2 Perform a network memory test, continuity test, and signaling

test on a specific loop and shelf:

LD 30

SHLF l sloop and shelf numbers

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If the system response is other than OK, see Software Input/Output Reference — Administration (NN43001-611) to analyze the messages.

3 For a line card on a superloop, perform a signaling test on a

specific card or unit: UNTT l s c loop, shelf, and card numbers For the NT8D02 Digital Line card, enter:

UNTT l s c u loop, shelf, card, and unit numbers If the system response is other than OK, see Software

Input/Output Reference — Administration (NN43001-611) to analyze the messages.

4 End the session in LD 30:

****

Multifrequency sender cards

Procedure 6 Testing multifrequency sender cards

Multifrequency sender cards 73

--End--

Step Action

Use this procedure to test a multifrequency sender (MFS) card or the MFS function of an NT8D17 Conference/TDS card.

1 Log into the system:

LOGI (password)

2 Test and enable an MFS loop:

LD 46 MFS loop

(on the NT8D17 Conference/TDS card, the TDS/MFS loop is the even loop of the conference/TDS loop pair)

If the system response is other than OK, see Software Input/Output Reference — Administration (NN43001-611) to analyze the messages.

3 Access the system from a maintenance telephone; then enter:

LD 46

Give the system approximately 20 seconds to load the program.

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See "Communicating with the Meridian 1" in Software Input/Output Reference — Administration (NN43001-611) for details on accessing the system from a maintenance telephone.

4 Obtain 10-second bursts of digits 1 to 9, 0, and 11 to 15 (in that

order) for all digits on the specified loop: TONE loop ALL Each burst should sound different. If the bursts do not sound

different, replace the card.

5 End the session in LD 46:

****

Multifrequency signaling cards

Procedure 7 Testing multifrequency signaling cards

Step Action

Use this procedure to test a multifrequency signaling card.

1 Log into the system:

LOGI (password)

--End--

2 Test and enable the specified unit:

3 End the session in LD 54:

Network cards

Procedure 8 Testing network cards

Step Action

Use this procedure to test a network card.

1 Log into the system:

2 Perform a network memory test, continuity test, and signaling

LD 54

ATST l s c u loop, shelf, card, and unit numbers

If the system response is other than OK, see Software Input/Output Reference — Administration (NN43001-611) to

analyze the messages.

****

--End--

LOGI (password)

test: LD 30 LOOP loop can be a specific loop number or ALL

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Trunk cards 75

If ALL is specified, all enabled loops (except attendant console loops) and all shelves on each loop are tested.

If only one loop is being tested and it is disabled, enter ENLL loop to enable and test a network card associated with the specified loop. (This command cannot enable network cards disabled by LD 32.)

Trunk cards

If the system response is other than

OK, see Software

Input/Output Reference — Administration (NN43001-611) to

analyze the messages.

3 End the session in LD 30:

****

--End--

Use the following procedures to test a trunk card.

Procedure 9 Testing a trunk card using a maintenance telephone

Step Action 1 Access the system from a maintenance telephone.

See "Communicating with the Meridian 1" in the Software Input/Output Reference — Administration (NN43001-611) for

details on accessing the system from a maintenance telephone.

2 Test the trunk unit:

LD 36

TRKlsculoop, shelf, card, and unit numbers

3 If the maintenance telephone is hooked up to a monitor and the

system response is other than OK, see Software Input/Output Reference — Administration (NN43001-611) to analyze the messages.

Procedure 10 Testing a trunk card using a system terminal

Step Action 1 Log into the system:

LOGI (password)

2 Enter:

LD 36

--End--

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76 Acceptance tests

3 To test a trunk from a remote test center, seize a central office

(CO) monitor trunk:

CALL

CALL l s c u

Seize the automatic number identification (ANI) trunk: TRK l s c u loop, shelf, card, and unit numbers

When you see the DN? prompt, enter the directory number (DN) you want the system to dial.

If the system response is other than OK, see the Input/Output Reference — Administration (NN43001-611) to analyze the messages.

4 End the session in LD 36:

****

5 Test an automatically identified outward dialing (AIOD) trunk

card:

LD 41

AIOD l s c loop, shelf, and card numbers

If the system response is other than OK, see Software Input/Output Reference — Administration (NN43001-611) to

analyze the messages.

6 End the session in LD 41:

****

Tone and digit switch cards

Procedure 11 Testing tone and digit switch cards

Software

--End--

Step Action

Use this procedure to test a tone and digit switch (TDS) card or to test the TDS function of an NT8D17 Conference/TDS card.

1 Log into the system:

LOGI (password)

2 Obtain a list of terminal numbers (TNs) for disabled TDS cards:

LD 34 STAD

3 If the TDS loop to be tested is disabled, enable it.

For an NT8D17 Conference/TDS card, enter:

ENLX loop

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Tone and digit switch cards 77

(the TDS/MFS loop is the even loop of the conference/TDS loop pair)

For other than an NT8D17 Conference/TDS card, enter: ENLL

loop

4 Test the TDS loop:

TDS loop

If the system response is other than OK, see Software Input/Output Reference — Administration (NN43001-611) to

analyze the messages.

5 End the session in LD 34:

****

6 Using a maintenance telephone, log into the system.

See "Communicating with the Meridian 1" in the Software Input/Output Reference — Administration (NN43001-611) for details on accessing the system using a maintenance telephone.

7 From the maintenance telephone, enter:

LD#34##

To test outpulsers and channels for the TDS loop, see Table

12 "TDS tone tests" (page 77) for a sample of the input

commands used with the maintenance telephone. See Software Input/Output Reference — Administration (NN43001-611) for all tones that can be tested.

8 Exit LD 34 from the maintenance telephone:

****

--End--

Table 12 TDS tone tests

Dial pad

Input command

BSY#loop## 279#loop## Provides busy tone from TDS loop specified. C##

equivalent Description

2##

Removes any active tone. DIA#loop## 342#loop## Provides dial tone from TDS loop specified. OVF#loop## 683#loop## Provides overflow tone from TDS loop specified.

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Table 12 TDS tone tests (cont’d.)

Dial pad

Input command

equivalent Description

RBK#loop## 725#loop## Provides ringback tone from TDS loop specified. RNG#loop## 764#loop## Provides ring tone from TDS loop specified. **** Exits TDS test program.

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Option settings

Contents

This section contains information on the following topics:

“Circuit card grid” (page 80) “NT1R20 Off-Premise Station card” (page 81) Table 14 "General purpose switch settings" (page 83) “NT6D42 Ringing Generator DC” (page 87) “NT6D80 Multi-purpose Serial Data Link card” (page 89) “NT8D14 Universal Trunk card” (page 90) “NT8D15 E and M Trunk card” (page 92)

“NT8D17 Conference/TDS card” (page 93) “NT8D21 Ringing Generator AC” (page 94) “NT8D22 System Monitor” (page 94) “NT8D41BA Quad Serial Data Interface Paddle Board” (page 99) “QPC43 Peripheral Signaling card” (page 101) “QPC414 Network card” (page 101) “QPC441 3-Port Extender cards” (page 101) “QPC841 4-Port Serial Data Interface card” (page 104)

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Circuit card grid

Some circuit cards contain option switches or jumpers, or both, that define specific functions. A switch or jumper can be identified by an alphanumeric coordinate (such as D29) that indicates a location on the card, or by a switch number (such as SW2) printed on the circuit board (see Figure 17

"Circuit card grid" (page 81)). Positions on a switch (for example, positions

1, 2, 3, and 4 on SW2) are labeled on the switch block. On a circuit card:

• ON may be indicated by the word "on," the word "up," the word

• OFF may be indicated by the word "down," the word "open," the

Throughout this document, if neither ON nor OFF is given (there is a blank space) for a position on a switch, that position may be set to either ON or OFF because it has no function for the option described.

"closed," the number "1," an arrow pointing up, or a solid dot (•).

number "0," or an arrow pointing down.

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Figure 17 Circuit card grid

NT1R20 Off-Premise Station card 81

NT1R20 Off-Premise Station card

Table 13 "OPS analog line card configuration" (page 81) lists option

settings for the NT1R20 Off-Premise Station analog card.

Table 13 OPS analog line card configuration

Application

Class of Service (CLS) (Note 1)

Loop resistance (ohms)

Jumper strap setting (Note 6)

On-premise station (ONS) Off-premise station (OPS)

ONP OPX

0–460

Both JX.0 and JX.1

off

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0–2300 (Note 2)

Both JX.0 and JX.1

off

Both JX.0 and JX.1

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82 Option settings

Table 13 OPS analog line card configuration (cont’d.)

Application

Class of Service (CLS) (Note 1)

Loop loss (dB) (Note 3)

TIMP (Notes 1, 4)

Class of Service (CLS) (Note 1)

BIMP (Notes 1, 4)

Gain treatment (Note 5)

Note 1: Configured in the Analog (500/2500-type) Telephone Administration program (LD 10). Note 2: The maximum signaling range supported by the OPS analog line card is 2300 ohms. Note 3: Loss of untreated (no gain devices) metallic line facility. Upper loss limits correspond to

loop resistance ranges for 26 AWG wire. Note 4: Default software impedance settings are:

TIMP:

BIMP:

On-premise station (ONS) Off-premise station (OPS)

ONP OPX

0–1.5 >1.5–2.5 >2.5–3.0 0–1.5 >1.5–2.5 >2.5–4.5 >4.5–15

600

ohms

600

ohms

NP CLS

O 600 ohms 600 ohms

600

ohms

ONP OPX

3COM1 3COM2

PX CLS

O 600 ohms

3COM2

600

ohms

600

ohms

600

ohms

No Yes

600

ohms

3COM1 3COM2 3COM2

600

ohms

600

ohms

Note 1: Gain treatment, such as avoicefrequencyrepeater (VFR) is required to limit the actual OPS loop loss to 4.5 dB, maximum. VFR treatment of metallic loops having untreated loss greater than 15 dB (equivalent to a maximum signaling range of 2300 ohms on 26 AWG wire) is not recommended.

Note 2: Jumper strap settings JX.0 and JX.1 apply to all eight units; "X" indicates the unit number, 0–7. "Off" indicates that a jumper strap is not installed across both pins on a jumper block. Store unused straps on the OPS analog line card by installing them on a single jumper pin as shown below:

NT5D12 Dual DTI/PRI (DDP) card

Switch setting tables for this card are listed in subsections according to their function. Bold font designates factory (default) settings.

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General purpose switches

Use switch set SW9 for Trunk 0; use switch set SW15 for Trunk 1 (see

Table 14 "General purpose switch settings" (page 83)).

Table 14 General purpose switch settings

Switch Description

Framing Mode

NT5D12 Dual DTI/PRI (DDP) card 83

SW9/SW15 switch setting

off - ESF

on - SF

Yellow Alarm Method

Zero Code Suppression Mode

Unused off

Trunk interface switches

A switch provides selection of T1 transmission. Use switch SW4 for Trunk 0; use switch SW10 for Trunk 1 (see Table 15 "Trunk interface

transmission mode switch settings" (page 83)).

Table 15 Trunk interface transmission mode switch settings

Description

For future use off

A set of three switches provides selection of dB values. Use SW5, SW6, and SW7 for Trunk 0; use SW11, SW12, and SW13 for Trunk 1 (see Table

16 "Trunk interface line build out switch settings" (page 83)).

off - FDL

on - Digit2 off - B8ZS

on - AMI

SW4/SW10 switch setting

Table 16 Trunk interface line build out switch settings

Description

0 dB off off off

7.5 dB 15 dB

Switch Setting

SW5/SW11 SW6/SW12 SW7/SW13

on on on

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off

off on

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84 Option settings

A set of four DIP switches provides selection among three values for receiver impedance. Use SW8 for Trunk 0; use SW14 for Trunk 1 (see

Table 17 "Trunk interface impedance switch settings" (page 84)).

Table 17 Trunk interface impedance switch settings

Description

75 100 120

Ring ground switches

A set of four DIP switches selects which Ring lines are connected to ground (see Table 18 "Ring ground switch settings" (page 84)).

Table 18 Ring ground switch settings

Switch

Description

Trunk 0 Transmit

Trunk 0 Receive

Trunk 1 Transmit

SW8/SW14 Switch Settings

off off on off off off

off off

S2 switch setting

off - Ring line is not grounded

on- Ring line is grounded off - Ring line is not grounded

on - Ring line is grounded off - Ring line is not grounded

on - Ring line is grounded

off on on

DCH mode and address select switches

One switch selects an on-board NTBK51AA D-Channel daughterboard and an external MSDL/DCHI card. Four other switches provide the daughterboard address (see Table 19 "DCH mode and address select

switch settings" (page 84)).

Table 19 DCH mode and address select switch settings

Swit

1-4

Description

D-Channel daughterboard Address

off - Ring line is not grounded

Trunk 1 Receive

on - Ring line is grounded

S3 Switch Setting

See the next table.

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Table 19 DCH mode and address select switch settings (cont’d.)

NT5D12 Dual DTI/PRI (DDP) card 85

Swit

5-7

Description

For future use off

External DCH or Onboard DDCH

Table 20 NTBK51AA daughterboard address select switch settings

Device Address

1 2 3 4 5on 6

Switch Setting

off off off off on off

off off off

on on on off off

off off

on on

7 ononon 8 9

off off off on

off off

S3 Switch Setting

off - MSDL or DCHI card

on - Onboard DDCH daughterboard

off off off off on on

off off off off on

on 10 11 12 13 14 15

off on on off off on off

off off on on

off

on on

on on on

on on on on

Note 1: The maximum number of DCHI, MSDL, and DDCH devices in the system is 16.The Device Addresses are equivalent to the MSDL DNUM designations. For programming information on the MSDL, refer to technical document Software Input/Output Reference — Administration (NN43001-611)guide.

Note 2: Device address 0 is commonly assigned to the System Monitor.

Illustrations of switch locations and settings

Figure 18 "Switch functions and areas" (page 86) displays functional areas

for switches on the NT5D12 DDP card.

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Figure 18 Switch functions and areas

Figure 19 "Switch default settings" (page 87) displays default settings for

switches on the NT5D12 DDP card.

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Figure 19 Switch default settings

NT6D42 Ringing Generator DC 87

NT6D42 Ringing Generator DC

Table 21 "NT6D42 recommended options for North American and British Telecom" (page 87) through Table 26 "NT6D42CC SW2" (page 89) list

option settings for the NT6D42 Ringing Generator.

Table 21 NT6D42 recommended options for North American and British Telecom

Ringing

Application

North America 20 Hz 86 V ac

frequency

Ringing voltage Jumper locations Ringing output

High voltage

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Low impedance

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88 Option settings

Application

Ringing frequency

Ringing voltage Jumper locations Ringing output

British Telecom 25 Hz 80 V ac

Table 22 NT6D42 jumper locations P4 and P5

High voltage message waiting Pin location

Disable Jumper in P4

Enable Jumper in P5

Note: One jumper must be installed.

Table 23 NT6D42 jumper location J7

Ringing output Jumper location J7

Low impedance (normal) Connect pins 1 and 2

message waiting P4

No high voltage

message waiting

Low impedance

High impedance (Australia) Connect pins 2 and 3

Table 24 NT6D42 SW1

Ringing frequency (Hz)

Table 25 NT6D42CB SW2

Ringing

voltage

86 V ac –120 V dc off off off off 86 V ac –150 V dc off off off 80 V ac –120 V dc 80 V ac –150 V dc 75 V ac –120 V dc off 75 V ac –150 V dc off

Position SW1

20 1 25 2 50 3

SW2

Message waiting

voltage 1 2 3 4

on on

off off off off off on on

on off off off

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Table 25 NT6D42CB SW2 (cont’d.)

NT6D80 Multi-purpose Serial Data Link card 89

SW2

Ringing

voltage

70 V ac –120 V dc off off 70 V ac –150 V dc off off

Table 26 NT6D42CC SW2

Ringing

voltage

86 V ac –100 V dc off off off off 86 V ac –150 V dc off off off 80 V ac –100 V dc 80 V ac –150 V dc 75 V ac –100 V dc off 75 V ac –150 V dc off 70 V ac –100 V dc off off 70 V ac –150 V dc off off

Message waiting

voltage 1 2 3 4

on on on

SW2

Message waiting

voltage 1 2 3 4

on on

off off off off off on on

off off off on on on

off

NT6D80 Multi-purpose Serial Data Link card

Table 27 NT6D80 Multi-purpose Serial Data Link card

Port 0—SW4 Port 0—SW8

RS-232-D DTE or DCE* RS-422-A DTE (terminal) RS-422-A DCE (modem)

RS-232-D DTE or DCE* RS-422-A DTE RS-422-A DCE

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all off all off all on

Port 1—SW3 Port 1—SW7

all off all off all on

Port 2—SW2 Port 2—SW6

all off all off all on

Port 3—SW1 Port 3—SW5

all off all on all off

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90 Option settings

Table 27 NT6D80 Multi-purpose Serial Data Link card (cont’d.)

RS-232-D DTE or DCE* RS-422-A DTE RS-422-A DCE

all off all off all on

all off all on all off

* RS-232-D DTE and DCE modes are software configured. RS-422-A DTE and DEC modes are switch configured.

Note: The device number for the MSDL card is configured in LD17 at the prompt DNUM. You must also set the device number, using switches S9 and S10, on the MSDL card. S9 designates ones and S10 designates tens. To set the device number as 14, for example, set S10 to 1 and S9 to 4.

NT8D14 Universal Trunk card

Table 28 "NT8D14 vintage AA jumper strap settings" (page 90) through Table 32 "NT8D14 vintages BA/BB cable loop resistance and loss" (page

92) list option settings for the NT8D14 Universal Trunk card.

Table 28 NT8D14 vintage AA jumper strap settings

Modes Location Jumper strap

Central Office (CO) J1, J2 off 2-way tie trunk (loop dial repeat) J1, J2 off 2-way tie trunk (outgoing/incoming dial) J1, J2 off Recorded announcement (RAN) J1, J2 off Paging trunk J1, J2 off Japan CO/DID operation J1, J2 off DID operation: loop length > = 20003/4 J1, J2 DID operation: loop length < 2000

/4 J1, J2 off

Note 1: off = no strap present. Note 2: Locations (J1, J2) apply to all eight units.

Table 29 NT8D14 vintages BA/BB jumper strap settings-factory standard

Jumper strap settings

Trunk types Loop length J1.X J2.X J3.X J4.X

CO/FX/WATS

Zero–1524 m (5000 ft)

Off Off

1–2 1–2 2-way tie (LDR) 2-way tie (OAID) DID Zero–600 ohms

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NT8D14 Universal Trunk card 91

Jumper strap settings

Trunk types Loop length J1.X J2.X J3.X J4.X

RAN: continuous operation mode

Paging

Not applicable: RAN and paging trunks should not leave the building.

Note: Jumper strap settings J1.X, J2.X, J3.X, and J4.X apply to all eight units; "X" indicates the unit number, 0–7. "Off" indicates that no jumper strap is installed on a jumper block. Store unused straps on the universal trunk card by installing them on a single jumper pin as shown below:

Table 30 NT8D14 vintages BA/BB jumper strap settings-extended range

Jumper strap settings

Trunk types Loop length J1.X J2.X J3.X J4.X

CO/FX/WATS

> 1524 m (5000 ft) Off Off

1–2 2–3 2-way tie (LDR) 2-way tie (OAID) DID > 600 ohms On On RAN: pulse start or level

start modes

Not applicable: RAN trunks should not leave

Off Off

1–2 2–3

2–3 1–2

the building.

Note: Jumper strap settings J1.X, J2.X, J3.X, and J4.X apply to all eight units; "X" indicates the unit number, 0–7. "Off" indicates that no jumper strap is installed on a jumper block.

Table 31 NT8D14 vintages BA/BB trunk types-termination impedance and balance network

Balance network for loop lengths (Note 2)

Zero–915 m

(zero–3000 ft)

915–1524 m

(3000–5000 ft)

> 1524 m

(> 5000 ft)

Trunk types

Terminating impedance (Note 1)

CO/FX/WATS 600 or 900 ohms 600 ohms 3COM1 3COM2 2-way tie (LDR) 600 or 900 ohms 600 ohms 3COM1 3COM2 2-way tie (OAID) 600 or 900 ohms 600 ohms 3COM1 3COM2 DID (loop < 600

600 or 900 ohms 600 ohms 3COM1 3COM2

ohms)

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92 Option settings

Table 31 NT8D14 vintages BA/BB trunk types-termination impedance and balance network (cont’d.)

Terminating impedance

Trunk types

DID (loopˇS 600 ohms)

RAN: continuous operation mode

Paging 600 ohms 600 ohms N/A N/A Note 1: The terminating impedance of each trunk unit is software selectable in LD 14 and should

match the nominal impedance of the connecting equipment. Note 2: The balance network of each trunk unit is software selectable between resistive 600 or 900

ohms or 3COM and is jumper selectable between 3COM1 and 3COM2.

Table 32 NT8D14 vintages BA/BB cable loop resistance and loss

Cable length 22 AWG 24 AWG 26 AWG 22 AWG 24 AWG 26 AWG

915 m (3000 ft) 1524 m (5000 ft)

(Note 1)

600 or 900 ohms 600 ohms N/A 3COM2

600 or 900 ohms 600 or 900 ohms N/A N/A

Cable loop resistance (ohms)

97 155 251 0.9 1.2 1.5 162 260 417 1.6 2.0 2.5

Balance network for loop lengths (Note 2)

Zero–915 m

(zero–3000 ft)

915–1524 m

(3000–5000 ft)

Cable loop loss (dB) (non-loaded at 1kHz)

> 1524 m

(> 5000 ft)

2225 m (7300 ft) 3566 m (11700 ft) 5639 m (18500 ft)

236 378 609 2.3 3.0 3.7 379 607 977 3.7 4.8 6.0 600 960 1544 5.9 7.6 9.4

NT8D15 E and M Trunk card

Table 33 NT8D15 E and M Trunk card

Mode of operation (Note 2) 2-wire trunk 4-wire trunk

DX tip & ring pair

Jumper (Note 1) Type I Paging Type I Type II

J1.X off off off off Pins 1–2 Pins 2–3 J2.X

J3.X off off off off (Note 4) (Note 4) J4.X off off off off Pins 2–3 Pins 1–2

on on

(Note 3)

on on

M—rcv M—xmt

off off

E—rcv M—xmt

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Table 33 NT8D15 E and M Trunk card (cont’d.)

Mode of operation (Note 2) 2-wire trunk 4-wire trunk

NT8D17 Conference/TDS card 93

DX tip & ring pair

Jumper (Note 1) Type I Paging Type I Type II

J5.X off off off off (Note 4) (Note 4) J6.X off off off off J7.X off off off off J8.X off off off off J9.X Pins 2–3 Pins 2–3 Pins 2–3 Pins 2–3 Pins 1–2 Pins 1–2

Note: Jumper strap settings J1.X through J9.X apply to all 4 units; "X" indicates the unit number, 0–3. Note: Off indicates that no jumper strap is installed on a jumper block. Note: Paging trunk mode is not zone selectable. Note: Jumper strap installed in this location only if external loop resistance exceeds 2500 ohms. Note: Dot next to the jumper block indicates pin 1.

M—rcv M—xmt

on on on on on on

E—rcv M—xmt

NT8D17 Conference/TDS card

Switch and jumper settings are used to select the companding law and to change the conference attenuation PAD levels. These PAD levels are used if prompt CPAD = 1 in LD97. The J1 connector on the faceplate is reserved for future use.

You can enable or disable a warning tone for conference calls. When the option is enabled, the tone lets callers know they are entering a conference call. The switch for this option is preset to disable the warning tone.

Companding law

µ-law (North America), A-law connect pins 2 and 3

Special cases connect pins 1 and 2

Attenuation levels 1 2 3

10.2 db

8.5 db 6 db off 6 db off off

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

on on on on

27 August 2008

Jumper at J3

SW2 (see Note)

off on on

Page 94

94 Option settings

Companding law

4.5 db 3db 0 db off 0 db off off off

Note: Set position 4 to ON to disable the warning tone option. When the warning tone is enabled, select the warning tone level as shown below.

Level Jumper at J2

24 db connect pins 1 and 2 30 db connect pins 2 and 3

on on on

Jumper at J3

off off on

off

NT8D21 Ringing Generator AC

Settings

Frequency Amplitude P1 P2 P3

20 Hz 86 V ac

25 Hz 70 V ac

25 Hz 80 V ac

25 Hz 86 V ac

50 Hz 70 V ac

50 Hz 80 V ac

open open

open

1–4

7–10

3–6

9–12

1–4

7–10

3–6

9–12

2–5

8–11 open open

open open

2–5

8–11 open

open

NT8D22 System Monitor

The master system monitor, located in the column with CP 0, must be numbered 0. Slave system monitors are numbered from 1 to 63.

For examples of system monitor option settings in basic configurations, see "Sample settings for NT8D22 System Monitors."

Configure the system monitor in Remote Peripheral Equipment (RPE) columns as slaves. There is no serial connection between RPE columns.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008

Page 95

NT8D22 System Monitor 95

Table 34 NT8D22 SW1

Position

SW1 function 12345678

Not used Meridian 1 columns only

Position 1 is OFF (Meridian 1 columns only) Not used Position 1 is ON, master column contains CP:master

slaves

DC-powered system AC-powered system

PFTU is activated by this column due to over-temperature PFTU is not activated by this column

Position 1 is OFF (Meridian 1 columns only) Not used Not used

on off

off off on off

on off

off on off

Not used Not used Not used Meridian 1 columns only

on on off off

Table 35 NT8D22 SW2

Position

SW2 indication 1 2 3 4 5 6 7 8

Master system monitor Slave system monitor

Not used All other operation

on off

Always

off

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NN43001-311 02.06 Standard

27 August 2008

on off on off

Page 96

96 Option settings

Table 35 NT8D22 SW2 (cont’d.)

Position

SW2 indication 1 2 3 4 5 6 7 8

For master, indicates total number of slaves

For each slave, indicates the slave address

Configure 3–8 according to the Table

37 "NT8D22 settings for total number of slaves-SW2 on master" (page 96).

Configure 3–8 according to the Table

38 "NT8D22AD/NT8D22ADE5 slave address-SW2 on slave" (page 97).

Table 36 NT8D22 SW3

SW3 indication 1 2 3 4

CTA

CTR

FAIL

MAJOR

master

slave

master

slave

master

slave

master

slave

on off

Table 37 NT8D22 settings for total number of slaves-SW2 on master

Position

on off

How many

slave units

0 1 2 3 4

Switch position Switch position

on on on on on on on on on on on on on on on on on on on

on on on 5ononon 6

on on on 7ononon 8 9

10 11

on on

How many

slave units

off on

off off off on on

off

off off off

off

on off off off on on on

off

on on

off

Nortel Communication Server 1000

NN43001-311 02.06 Standard

off

off off off

Circuit Card Reference

27 August 2008

32 33 34 35 36 37 38 39 40 41 42 43

off off off off off off off off off off off off

on on on on on on on on on on on on on on on on on on on on on on on on on on on

off off off off off off off on on on

off

on on

off

off on

off off off on on on

off on

off off off

Page 97

Table 37 NT8D22 settings for total number of slaves-SW2 on master (cont’d.)

NT8D22 System Monitor 97

How many

slave units

12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

Switch position Switch position

on on on on on on on on on

off

off off

off off off off off off off off off off off on on on on on on on on on on on on on on on

on on on

off

off off off on on

off

off off off

off

on off off off on on on on on on on

off

off off off

How many

slave units

44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

off

off off off off off off off off off off off off off off off off off off off off off off off off off off off off off

off off off off off off off

on on on

off on

off off off off on on on on on on on on on on on on

off

off off

off off off

off on

off off off on on on

off on

on on on on on on on

off on

off

off off 28 29 30 31

off off off

off off off off

off off off off off

on on on

off on

Table 38 NT8D22AD/NT8D22ADE5 slave address-SW2 on slave

Slave unit

address

1 2 3 4

on on on on on on on on on on on on on

on on on 5ononon 6

on on on 7ononon

Position Position

Slave unit

off on

off off off on on

off

off off off

off on

off off off

Nortel Communication Server 1000

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27 August 2008

60 61 62 63

address

33 34 35 36 37 38 39

off off off off off off off off off off off off off

on on on

off on

off off off off off off

off off off off off off off

on on on on on on on on on on on on on on on on on on

off on

off off off on on

off

off off off

off on

off off off

Page 98

98 Option settings

Table 38 NT8D22AD/NT8D22ADE5 slave address-SW2 on slave (cont’d.)

Slave unit

address

8 9

10 11 12 13 14 15 16 17 18 19 20 21 22

on on

off

Position Position

off off off off off off off off off off off off off off off on on on on on on on on on on on on on on

on on on on on on on

off off off off

off on

off off off on on on

off on

off off off on on on

off on

Slave unit

address

40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

off

off off off off off off off off off off off off off off off

on on on

off

on on

off

off off off off off off off off off off off off on on on on on on on on on on on on

off

off off

off on

off off off on on on

off on

off off off on on on

off on

23 24 25 26 27 28 29 30 31 32

off

off off off off off off off off off off off off off off off off off off off off off off off off on on on on on

off off off on on on on on on on

NT8D22 jumper settings

EA-GND short (Pins 2 and 3 short) Accessing External EPROM. EA-VCC short (Pins 2 and 1 short) Accessing Internal EPROM.

off on

off off off on on on

off on

55 56 57 58 59 60 61 62 63

off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off

off off off on on on on on on on

off on

off off off on on on

off on

Nortel Communication Server 1000

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Page 99

NT8D41BA Quad Serial Data Interface Paddle Board 99

NT8D41BA Quad Serial Data Interface Paddle Board

Baud rate

Switches SW13, SW10, SW11, and SW12 determine the baud rate for ports 1, 2, 3, and 4, respectively. See the configuration for these switches in SDI paddle board baud rate switch settings.

Table 39 QSDI paddle board baud rate switch settings

SW13 (port 1), SW10 (port 2),

Baud

rate

150 2.40 300 4.80

600 9.60 1,200 19.20 2,400 38.40 4,800 76.80 9,600 153.60

19,200*

Baud Clock

(kHz) 1 2 3 4

307.20

on on on on on on on on on on on on on on on

SW11 (port 3), SW12 (port 4)

off

off off

off

off off off

on on off

on off off

on on off off

* For future use.

Address

Switch SW15 or SW16 and logic on the card always address the four UARTs using a pair of addresses: 0 and 1, 2 and 3 through 14 and 15. The configurations for both switches are shown in Table 40 "QSDI paddle

board address switch settings" (page 99). To avoid system problems,

switches SW15 and SW16 must not be configured identically.

Table 40 QSDI paddle board address switch settings

SW15 SW16

Device

pair

addresses

* To enable ports 1 and 2, set SW15 position 1 to ON. To enable ports 3 and 4, set SW16 position 1 to ON.

Port 1 Port 2 Port 3 Port 4 1* 2

01 23 4 6

5 7

E X off off off off off off E X off off off off off E X off off off off E X off off off off

Switch settings

on on on

on off

For each X, the setting for this switch makes no difference, because it is not used.

Nortel Communication Server 1000

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Page 100

100 Option settings

89 10 11 12 13 14 15

* To enable ports 1 and 2, set SW15 position 1 to ON. To enable ports 3 and 4, set SW16 position 1 to ON.

For each X, the setting for this switch makes no difference, because it is not used.

E X off off off E X off off off E X off off off E X off off off

on on on on on on on

off off off

DTE/DCE mode

Each serial port can be configured to connect to a terminal (DTE equipment) or a modem (DCE equipment). Instructions for configuring the DTE/DCE switches SW2, SW3, SW4, SW5, SW6, SW7, SW8, and SW9 are shown in Table 41 "QSDI paddle board DTE/DCE mode switch

settings" (page 100).

Example: Port 1 is changed from DTE to DCE by reversing every switch position on SW3 and SW2; that is, switches that were off for DTE are turned on for DCE, and switches that were on for DTE are turned off for DCE.

on off

Table 41 QSDI paddle board DTE/DCE mode switch settings

Port 1 - SW 3 Port 1 -SW 2

Mode 1 2 3 4

DTE (terminal) DCE (modem) off off off

on on on

Port 2 — SW 5 Port 2 — SW4

on on on

Port 3 — SW 7 Port 3— SW 6

on on on

Port 4 — SW 9 Port 4 — SW 8

on on on

off on

on off

61234

off off on on

on off

off on

on off

off on

on off

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008

Nortel 1000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual