Nortel Networks NN43001-301 User Manual

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Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301

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Document status: Standard Document version: 02.03 Document date: 7 December 2007

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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New in this release 9

Other 9

How to get help 11

Getting help from the Nortel web site 11 Getting help over the telephone from a Nortel Solutions Center 11 Getting help from a specialist by using an Express Routing Code 11 Getting help through a Nortel distributor or reseller 12

Introduction 13

Subject 13 Applicable systems 13 Intended audience 14 Related information 14

ISDN Primary Rate Interface equipment overview 15

Contents 15 Introduction 17 Primary Rate Interface (PRI) hardware requirements 17 ISDN Signaling Link (ISL) hardware 18 D-Channel Handler description 20 NT6D11 DCH 20 QPC757 DCH 21 NT6D80 MSDL 23 NTBK51 Downloadable D-Channel Daughterboard 25 Standard PRI cards 25 NT8D72 PRI2 25 QPC720 PRI 30 Disk drive hardware 34 NT5D97 Dual-port DTI2/PRI2 card 34 NT5D12 Dual-port DTI/PRI 57

Revision History 9

DCH installation 79

Contents 79 Install the NT6D11AB, NT6D11AE, NT6D11AF DCH 79 Set up the NT6D11AB, NT6D11AE, NT6D11AF DCHI 80

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4 Contents

Install the NT6D11AB, NT6D11AE, NT6D11AF DCHI 85 Remove the NT6D11AB, NT6D11AE, NT6D11AF DCH 86 Install the QPC757 DCH 87

NTBK51 DDCH installation and removal 91

Contents 91 Introduction 91 Install NTBK51 DDCH on NT5D97 dual-port DTI2/PRI2 card 91 Remove NTBK51 DDCH from NT5D97 dual-port DTI2/PRI2 card 92 Install NTBK51 DDCH on NT5D12 dual-port DTI/PRI 93 Remove NTBK51 DDCH from NT5D12 dual-port DTI/PRI 94

MSDL installation for all systems 95

Contents 95 Install the MSDL 95 Replace the MSDL 98

NT8D72 and QPC720 PRI card installation 101

Contents 101 Introduction 101 PRI circuit pack locations 101 Cable requirements 102 Switch settings 120 Install NT8D72 and QPC720 PRI cards on Large Systems 123 Remove NT8D72 and QPC720 PRI cards from Large Systems 124 Install an additional network shelf 125

NT5D97 Dual-port DTI2/PRI2 installation and removal 127

Contents 127 Introduction 127 NT5D97 circuit card locations 127 Port deﬁnitions 128 Case Scenarios for replacing a digital trunk NT8D72BA, QPC536E, or NTCK43

by a DDP2 card 128 NT5D97AA/AB DIP switch settings 129 NT5D97AD DIP switch settings 134 Install the NT5D97 DDP2 139 Remove the NT5D97 DDP2 140 Conﬁgure the NT5D97 DDP2 141

NT5D12 Dual-port DTI/PRI card installation 143

Contents 143 Introduction 143 NT5D12 circuit card locations 143 Port deﬁnitions 144 Scenarios for replacement of a digital trunk card (QPC720/QPC472) by a DDP

card 144

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Contents 5

NT5D12 switch settings 145 Install the NT5D12 DDP 150 Remove the NT5D12 DDP 152 Conﬁgure the NT5D12 DDP 153

Clock Controller description and installation 155

Contents 155 Introduction 156 Description 156 Installation procedures 168

ISL installation 179

Contents 179 ISL conﬁgurations 179 DCHI switch settings 180 MSDL switch settings 181 Dedicated mode using leased line 183 Dedicated mode using dialup modem 184 ISL installation 189

Echo canceller installation 191

Contents 191 Introduction 191 Echo canceller operating parameters 191 Echo canceller initialization procedures 191 PRI to Echo canceller pin assignments 192 Electromagnetic Interference 192

1.5 Mb PRI implementation 195

Contents 195 Overview 195 Hardware requirements 195 Hardware description 196 Install PRI hardware 203

1.5 Mb DTI implementation 219

Contents 219 Overview 219 Hardware requirements 219 Hardware description 220 Install DTI hardware 220 Software enable the DTI/PRI cards 222

1.5 Mb ISL implementation 227

Contents 227 Overview 227 Hardware requirements 227 Basic ISL implementation 232

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6 Contents

2.0 Mb DTI implementation 237

Contents 237 Overview 237 Hardware requirements 237 NTAK10 2.0 Mb DTI card 238 Install DTI hardware 238 DTI software implementation 241

2.0 Mb PRI implementation 257

Contents 257 Overview 257 Hardware requirements 257 Hardware description 258 Install the NTAK79 PRI card 261 Install the NTBK50 PRI card 266 PRI software implementation 272

2.0 Mb ISL implementation 283

Contents 283 Overview 283 ISL hardware requirements 283 ISL hardware installation 286 ISL software implementation 288

Nonstandard cables 295

Contents 295 Introduction 296 NT5K40AA, NT5K41AA, NT5K86AA 296 NT8D7206, NT8D7207 296 QCAD128 297 QCAD129 298 QCAD133 298 NT8D7205 299 QCAD328 300 NT8D74 Clock Controller to InterGroup cable 301 NT8D75 Clock Controller to Clock Controller cable 301 NT8D79 PRI/DTI to Clock Controller cable 301 NT8D83 PRI/DTI to I/O cable 301 NT8D85 Network to IPE cable 302 NT8D86 Network to I/O cable 302 NT8D97AX PRI/DTI I/O to MDF cable 302 NT9J93AD PRI/DTI Echo Canceller to I/O cable 303 NTND26 PRI to MSDL cables 303 NTND27 MSDL to I/O panel cables 303 NTND98 PRI to I/O panel cables 303

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Contents 7

Procedures

Procedure 1 Install the NT6D11AB, NT6D11AE, NT6D11AF DCH 85 Procedure 2 Remove the NT6D11AB, NT6D11AE, NT6D11AF DCH 86 Procedure 3 Install the QPC757 DCHI 87 Procedure 4 Remove the QPC757 DCH 90 Procedure 5 Install the NTBK51 on the NT5D97 dual-port DTI2/PRI2

card 92

Procedure 6 Remove the NTBK51 from the NT5D97 dual-port DTI2/PRI2

card 93

Procedure 7 Install the NTBK51 DDCH on the NT5D12 dual-port

DTI/PRI 94

Procedure 8 Remove the NTBK51 from the NT5D12 dual-port DTI/PRI

card 94 Procedure 9 Install the MSDL card 95 Procedure 10 Replace the MSDL card 98 Procedure 11 Install the NT8D72 and QPC720 PRI on Large Systems 123 Procedure 12 Procedure 13 Install an additional network shelf on Half Group and Single

Procedure 14 Install the NT5D97 on Large Systems 139 Procedure 15 Remove the NT5D97 from Large Systems 141 Procedure 16 Install the NT5D12 on Large Systems 151 Procedure 17 Remove the NT5D12 DDP 152 Procedure 18 Install a clock controller for Half Group and Single Group

Procedure 19 Install a Clock Controller on a Single Group and Multi Group Procedure 20 Remove old equipment 175

Procedure 21 Installing new equipment 176 Procedure 22 Install ISL in dedicated mode 189 Procedure 23 Install ISL in shared mode 189 Procedure 24 Mounting the NTAK20 daughterboard on the NTRB21 203 Procedure 25 Inserting the NTRB21 TMDI card 205 Procedure 26 Removing the NTRB21 TMDI card 206 Procedure 27 Mounting the daughterboards on the NTAK09 206 Procedure 28 Removing the daughterboards from the NTAK09 207 Procedure 29 Installing the NTAK09 209 Procedure 30 Connecting the cables 209 Procedure 31 Enabling the NTRB21 TMDI card 210 Procedure 32 Enabling the NTAK09 DTI/PRI card 211 Procedure 33 Implementing basic PRI 212 Procedure 34 Enabling the NTRB21 TMDI card 222 Procedure 35 Enabling the NTAK09 card 222 Procedure 36 Implementing DTI 223 Procedure 37 Installing ISL hardware 230 Procedure 38 Implementing dedicated mode 232 Procedure 39 Connecting the cables 240 Procedure Procedure 40 Connecting the cables 264

124

Group systems 125

Systems. 171

System 173

261

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8 Contents

Procedure

266 Procedure 41 Inspecting the NTBK50 circuit card 266 Procedure 42 Installing the NTAK02 286 Procedure 43 Setting up the D-channel 287

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New in this release

There have been no updates to the document in this release

Other

Revision History

December 2007

August 2007

June 2007 Standard 01.02. This document is up-issued to remove the Nortel

May 2007

August 2005

September 2004

October 2003

Standard 02.03. This document has been up-issued to support Communication Server Release 5.5.

Standard 01.03. This document has been up-issued to support a change request.

Networks Confidential statement. Standard 01.01. This document is issued to support Communication

Server 1000 Release 5.0. This document contains information previously contained in the following legacy document, now retired: ISDN Primary Rate Interface Installation and Commissioning (NN43001-301). No new content has been added for Communication Server 1000 Release 5.0. All references to Communication Server 1000 Release 4.5 are applicable to Communication Server 1000 Release 5.0.

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

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

Standard 1.00. This document 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:

ISDN Primary Rate Interface Installation and Commissioning

•

ISDN Primary Rate Interface: Installation (553-2901-201)

•

1.5Mb DTI/PRI: Description, Installation and Maintenance (553-3011-310) (Content from 1.5Mb DTI/PRI: Description, Installation and Maintenance (553-3011-310) also appears in ISDN Primary Rate Interface Maintenance (NN43001-717).)

Nortel Communication Server 1000

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10 New in this release

•

2.0Mb DTI/PRI: Description, Installation and Maintenance (553-3011-315) (Content from 2.0Mb DTI/PRI: Description, Installation and Maintenance (553-3011-315) also appears in ISDN Primary Rate Interface Maintenance (NN43001-717).)

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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:

ttp://www.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 TechnicalSupport 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:

ttp://www.nortel.com/callus

Getting help from a specialist by using an Express Routing Code

Toaccess 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:

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12 How to get help

http://www.nortel.com/erc

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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Introduction

This document is a global document. Contact your system supplier or your Nortel representative to verify that the hardware and software described are supported in your area.

Subject

Note on legacy products and releases

This technical document contains information about systems, components, and features that are compatible with Nortel Communication Server 1000 Release 5.5 software. For more information on legacy products and releases, click the Training on the Nortel home page:

ww.nortel.com

Applicable systems

This document applies to the following systems:

Technical Documentation link under Support &

•

Communication Server 1000E (CS 1000E) CP PII, CP PIV and CP PM

•

Communication Server 1000M Single Group (CS 1000M SG) CP PII, CP PIV

•

Communication Server 1000M Multi Group (CS 1000M MG) CP PII, CP PIV

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Meridian 1 PBX 11C Chassis

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Meridian 1 PBX 11C Cabinet

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Meridian 1 PBX 61C CP PII, CP PIV

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Meridian 1 PBX 81C CP PII, CP PIV Note: When upgrading software, memory upgrades may be required on

the Signaling Server, the Call Server, or both.

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14 Introduction

System migration

When particular Meridian 1 systems are upgraded to run CS 1000 software and conﬁgured to include a Signaling Server, they become CS 1000 systems. Table 1 "Meridian 1 systems to CS 1000 systems" (page 14) lists each Meridian 1 system that supports an upgrade path to a CS 1000 system.

Table 1 Meridian 1 systems to CS 1000 systems

This Meridian 1 system...

Meridian 1 PBX 11C Chassis CS 1000E Meridian 1 PBX 11C Cabinet CS 1000E Meridian 1 PBX 61C CS 1000M Single Group Meridian 1 PBX 81C CS 1000M Multi Group

Intended audience

This document is intended for individuals responsible for installing and conﬁguring ISDN PRI.

Related information

This section lists information sources that relate to this document.

Technical Documents

The following technical documents are referenced in this document:

•

Features and Services Fundamentals (NN43001-106)

•

Software Input Output Administration (NN43001-611)

•

Software Input Output Reference — Maintenance (NN43001-711)

Maps to this CS 1000 system

Online

To access Nortel documentation online, click the Technical Documentation link under Support & Training on the Nortel home page:

ww.nortel.com

CD-ROM

To obtain Nortel documentation on CD-ROM, contact your Nortel customer representative.

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ISDN Primary Rate Interface equipment overview

The section contains information on the following topics:

"Introduction" (page 17) "Primary Rate Interface (PRI) hardware requirements" (page 17) "ISDN Signaling Link (ISL) hardware" (page 18)

"64 Kbit/s Clear Data Hardware" (page 20) "D-Channel Handler description" (page 20) "NT6D11 DCH" (page 20)

"Power requirements" (page 20)

"DCH/PRI interface" (page 20)

"DCH faceplate" (page 20)

"QPC757 DCH" (page 21)

"Power requirements" (page 21)

"DCH/PRI interface" (page 21)

"QPC757 faceplate" (page 22) "NT6D80 MSDL" (page 23)

"Power requirements" (page 23)

"MSDL/PRI interface" (page 24)

"MSDL faceplate" (page 24) "NTBK51 Downloadable D-Channel Daughterboard" (page 25) "Standard PRI cards" (page 25) "NT8D72 PRI2" (page 25)

"Power requirements" (page 25)

"NT8D72 faceplate" (page 25)

"Cable requirements" (page 27)

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16 ISDN Primary Rate Interface equipment overview

"Carrier interface" (page 27)

"Echo canceller interface" (page 28)

"QMT21 High Speed Data Module" (page 28)

"QPC720 PRI for 1.5/2.0 Mb gateway" (page 28)

"Clock operation for the NT8D72" (page 28) "QPC720 PRI" (page 30)

"Power requirements" (page 30)

"QPC720 faceplate" (page 31)

"QPC720 Cable requirements" (page 32)

"Carrier interface" (page 32)

"Echo Canceller interface" (page 32)

"64 T-link version 2 protocol" (page 33) "Disk drive hardware" (page 34) "NT5D97 Dual-port DTI2/PRI2 card" (page 34)

"External D-Channel Interface DCH or MSDL" (page 34)

"NT5D97 faceplate" (page 35)

"System capacity and performance" (page 39)

"Testability and diagnostics" (page 40)

"Cable requirements" (page 40)

"Cable diagrams" (page 47)

"Clock for the NT5D97" (page 49) "NT5D12 Dual-port DTI/PRI" (page 57)

"D-Channel and MSDL interface" (page 58)

"NT5D12 faceplate" (page 59)

"System capacity and performance" (page 64)

"Power requirements" (page 65)

"Testability and diagnostics" (page 65)

"NT5D12 Cable requirements" (page 65)

"Trunk Tip/Ring cables" (page 66)

"Reference clock cables" (page 68)

"MSDL/DCHI cables" (page 68)

"Cable diagrams" (page 69)

"Clock" (page 70)

"Reference clock errors" (page 71)

"Automatic clock recovery" (page 72)

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Primary Rate Interface (PRI) hardware requirements 17

"Automatic clock switching" (page 72)

"Clock configurations" (page 72)

Introduction

This chapter describes the basic hardware needed to equip ISDN PRI on CS 1000 and Meridian 1 systems.

Primary Rate Interface (PRI) hardware requirements

The following hardware is required to equip ISDN PRI on a Large System:

•

NT6D11(AB/AE/AF) D-Channel Interface (DCH) card (for 2.0 Mb PRI)

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QPC757 D-channel Interface (DCH) for (1.5 Mb PRI)

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NT6D80 Multipurpose Serial Data Link (MSDL) card

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NTBK51 Downloadable D-Channel Daughterboard (DDCH), the NT5D97 dual-port DTI2/PRI2 card, or the NT5D12 dual-port 1.5 Mb DTI/PRI card

•

NT8D72 (AB/BA) PRI2 card

• NT5D97 dual-port DTI2/PRI2 card

•

QPC720 1.5 Mb PRI card

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NT5D12 dual-port 1.5 DTI/PRI card

•

QPC775 or NTRB53 Clock Controller Note: The NTRB53 Clock Controller cannot be combined with a

QPC775 or a QPC471 card in one system

Additional hardware is also required for PRI capability and applications. Installation instructions are given in other Nortel publications, or supplied by the manufacturer. This additional hardware includes:

•

QPC414 Network card

•

Channel Service Unit (CSU)

•

Echo canceller

•

ROM circuit card requirements: — the QPC939A for a CS 1000M HG — the QPC939A for CS 1000M SG

Note: CS 1000M MG ROM requirements are fulﬁlled by the NT6D66 Call Processor (CP) card.

•

QMT8 Asynchronous Data Module (ADM)

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18 ISDN Primary Rate Interface equipment overview

See Figure 1 "PRI hardware (shown without downloadable PRI and DCH

cards)" (page 18) for a representation of the basic PRI system hardware.

Note: Figure 1 shows a basic conﬁguration, not the dual-port NT5D12 DTI/PRI card, nor the associated dual-port NTBK51AA Downloadable D-Channel daughterboard.

Figure 1 PRI hardware (shown without downloadable PRI and DCH cards)

ISDN Signaling Link (ISL) hardware

The following hardware is required for ISDN Signaling Link (ISL) capability and applications.

Equipment required for shared mode capability:

• NT6D11(AB/AE/AF) D-Channel (DCH) card (for 2.0 Mb PRI)

•

QPC757 D-channel (DCH) for (1.5 Mb PRI)

•

NT6D80 Multipurpose Serial Data Link (MSDL) card

• NTBK51 Downloadable D-Channel Daughterboard (DDCH), the NT5D97 dual-port DTI2/PRI2 card, or the NT5D12 dual-port 1.5 Mb DTI/PRI card

•

NT8D72 (AB/BA) PRI2 card

•

NT5D97 dual-port DTI2/PRI2 card

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QPC720 1.5 Mb PRI card

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ISDN Signaling Link (ISL) hardware 19

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NT5D12 dual-port 1.5 DTI/PRI card

•

QPC775 Clock Controller or NTRB53

Equipment required for dedicated mode using leased lines:

• NT6D11(AB/AE/AF) D-Channel (DCH) card (for 2.0 Mb PRI)

•

QPC757 D-channel (DCH) for (1.5 Mb PRI)

•

NT6D80 Multipurpose Serial Data Link (MSDL) card

• NTBK51 Downloadable D-Channel Daughterboard (DDCH), used as an option to the NT6D80 MSDL

•

modem set in synchronous mode

Equipment required for dedicated mode using a dialup modem:

•

NT6D11(AB/AE/AF) D-Channel (DCH) card (for 2.0 Mb PRI)

•

QPC757 D-channel (DCH) for (1.5 Mb PRI)

•

NT6D80 Multipurpose Serial Data Link (MSDL) card

•

NTBK51 Downloadable D-Channel Daughterboard (DDCH), used as an option to the NT6D80 MSDL

•

modem with autodial capability Note: This conﬁguration is the least reliable due to lockup problems

inherent in Smart Modems from power spikes and noisy lines. To increase the reliability on this conﬁguration, use a constant power source when powering the modems. Also, verify that TIE lines meet data grade speciﬁcations. Nortel takes no responsibility for ISL D-Channel outages due to modem lockup.

•

500 set line card

•

QPC71 2W TIE, or QPC237 4W TIE E&M

Equipment required for dedicated mode using a DTI/DTI2 trunk:

•

NT6D11(AB/AE/AF) D-Channel (DCH) card (for 2.0 Mb PRI)

•

QPC757 D-channel (DCH) for (1.5 Mb PRI)

•

NT6D80 Multipurpose Serial Data Link (MSDL) card

•

NTBK51 Downloadable D-Channel Daughterboard (DDCH), used as an option to the NT6D80 MSDL

•

NT5D97 dual-port DTI2/PRI2 card

• QPC472 1.5 Mb DTI card or NT5D12 dual-port 1.5 DTI/PRI card

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20 ISDN Primary Rate Interface equipment overview

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QMT8 Asynchronous Data Module (ADM), QMT11 Asynchronous/Synchronous Interface Module (ASIM) or QMT21 High Speed Data Module (HSDM)

•

Data line card

64 Kbit/s Clear Data Hardware

The QMT21 High Speed Data Module (HSDM) is required in the clear-data pathway to support the 64Kbit/s clear-data function. One module is required at each system end of any connection.

D-Channel Handler description

This section provides descriptions of the D-Channel (DCH) cards, the MSDL card, and the Downloadable D-Channel Daughterboard.

NT6D11 DCH

Power requirements

The power requirements for the NT6D11AB/11AE/AF DCH are:

•

+5 volts at 3 amperes

•

+12 volts at 75 milliamperes

•

-12 volts at 75 milliamperes

DCH/PRI interface

The NT6D11AB/AE/AF DCHs connect to the PRI2 cards by means of a special RS422 cable, the QCAD328A, which is a special RS422 cable; refer to "QCAD328" (page 300) of the Cabling chapter for more details.

DCH faceplate

NT6D11AB/AE/AF DCHs have one Light Emitting Diode (LED), to indicate an active or inactive state, and two external connectors:

•

Port J1 is a standard asynchronous port providing an interface for non-PRI applications.

Note: This connection will not support an Add-on Data Module (ADM) terminal.

•

Port J2 is the D-Channel Interface port.

Figure 2 "NT6D11 DCH faceplate layout" (page 21) shows the faceplate

layout.

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Figure 2 NT6D11 DCH faceplate layout

QPC757 DCH 21

QPC757 DCH

Power requirements

The power requirements for the QPC757 DCH are:

•

+5 volts at 3 amperes

•

+12 volts at 50 milliamperes

•

–12 volts at 50 milliamperes

DCH/PRI interface

The QPC757 DCH connects to the QPC720 PRI via a RS-422 cable. The following signals are transmitted across the interface:

•

RCV DATA

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RCV CLOCK

•

XMIT CLOCK

•

XMIT READY

•

PRI READY

•

DCH READY

PRI READY and DCH READY are handshake signals.

QPC757 faceplate

The QPC757 DCH, as shown in Figure 3 "QPC757 DCH faceplate layout"

(page 23) has one LED to indicate an active or inactive state and two

external connectors as follows:

•

Port J1 is a standard asynchronous port in LD 48 Note: This connection does not support an Add-on Data Module (ADM)

terminal.

•

Port J2 is the D-Channel Interface port. Note: A QPC757 vintage C is required if the ISL Revert to Conventional

Signaling feature is conﬁgured. The QPC757 vintage D is recommended for combination ISL/PRI networks using NACD or Network Message Services and ISL networks using modems.

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Figure 3 QPC757 DCH faceplate layout

NT6D80 MSDL 23

NT6D80 MSDL

The NT6D80 MSDL card can be used in conjunction with, or independent of, the QPC757, or NT6D11AB/AE/AF DCH.

Power requirements

The NT6D80 MSDL power requirements are:

Voltage

(VAC)

+12 0.10 1.20 4.15

-12 0.10 1.20 4.15

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Current

(Amps)

3.20 16.00 55.36

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Power

(Watts)

Heat

(BTUs)

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24 ISDN Primary Rate Interface equipment overview

MSDL/PRI interface

MSDL can connect to PRI trunks through RS-422 or RS-232 interfaces. The interfaces are switch conﬁgured.

MSDL faceplate

The NT6D80 MSDL has one LED to indicate an active or inactive state and four external connectors. Each port can be RS-422 or RS-232 connectors, with either DCE or DTE interfaces. Refer to Figure 4 "NT6D80 MSDL

faceplate layout" (page 24).

Figure 4 NT6D80 MSDL faceplate layout

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NTBK51 Downloadable D-Channel Daughterboard

The NTBK51 is a two port DownloadableD-Channel Daughterboard (DDCH) that has been introduced as an option to the NT6D80 MSDL, the NT5D97 dual-port DTI2/PRI2 card, or the NT5D12 dual-port 1.5 Mb DTI/PRI card.

The NTBK51 supports all the features of the existing 4 port MSDL (NT6D80), and eliminates the need foran external DCH card and associated cables for MSDL applications. The NTBK51 can support a maximum of 32 (16*2) MSDL type D-Channels per system, unlike the MSDL which can support a maximum of 64.

Note 1: Only one version, the NTBK51AA, can be used with the NT5D97, or the NT5D12. The NTBK51BA version has only 30+30 pin connectors (instead of 40+30 pins in the AA version). The missing 10 pins in the BA version prohibits the use of port 0 on the NT5D97, or NT5D12 card.

Note 2: The software allocation for NTBK51AA DDCH is similar to the MSDL. It is both physical and logical, and supports D-Channel functionality only.

NT8D72 PRI2 25

Note 3: Port 0 has to be an even loop on the DDP2, and Port 1 has to be an odd loop. Port 2 and Port 3 should not be conﬁgured.

The connection between the dual-port cards and the DDCH daughterboard is made using two headers: one 30 pin and one 40 pin connector.

Standard PRI cards

This section provides a description of the standard ISDN PRI cards, namely the NT8D72 (AB/BA) PRI2 card, and the QPC720 1.5 Mb PRI card.

NT8D72 PRI2

Power requirements

The NT8D72AB and NT8D72BA PRI use power and ground connections from the backplane. Power requirements are:

+5 volts at 4 amperes +12 volts at 50 milliamperes

-12 volts at 50 milliamperes

NT8D72 faceplate

The NT8D72 contains ﬁve LEDs and six external connectors. Figure 5

"NT8D72 PRI faceplate layout" (page 26) shows the faceplate layout.

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26 ISDN Primary Rate Interface equipment overview

Figure 5 NT8D72 PRI faceplate layout

Table 2 "NT8D72 PRI External connectors" (page 26) gives information

about the external connectors located on the NT8D72 PRI2 faceplate.

Table 2 NT8D72 PRI External connectors

Faceplate Destination Type Description

J1 9-pin female, D-connector Reference Clock 0 interface J2 9-pin female, D-connector Reference Clock 1 interface J3 36-pin connector Loop interface J4 15-pin male, D-connector External digital trunk J5 15-pin male, D-connector D-Channel interface J6 15-pin female, D-connector Echo Canceller/RS-232 interface

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NT8D72 PRI2 27

Faceplate Destination Type Description

RCV MON Miniature bantam jack Monitor DSI from network XMT MON Miniature bantam jack Monitor DSI from PRI

Cable requirements

Table 3 "NT8D72AB and NT8D72BA PRI: Cables and cable lengths" (page

27) lists the types of cable used and the lengths required for internal and

external NT8D72 PRI2 connections.

Note: No additional cabling is required fornB+D conﬁgurations. Multiple PRIs and the D-Channel are associated at the PRI prompt in LD 17.

Table 3 NT8D72AB and NT8D72BA PRI: Cables and cable lengths

Maximum length

Cable Type From To

(meters)

NT8D79AA PRI card Clock controller (CC-0) NT8D79AA PRI card Clock controller (CC-1) QCAD328A PRI card DCH card QCAD328B PRI card DCH card QCAD328C PRI card DCH card QCAD328D PRI card DCH card NTND26AA PRI card MSDL NTND26AB PRI card MSDL NTND26AC PRI card MSDL NTND26AD PRI card MSDL NT8D85AB PRI card Network Network Card RS-232 PRI card Echo canceller NT8D7207 PRI card I/O panel NT8D7205 I/O panel

crossconnect

Carrier interface

The NT8D72 PRI2 provides an interface to the 2Mb external digital line either directly or through an ofﬁce repeater, echo canceller or line terminating unit (LTU).

2.13

1.8

5.5

10.67

15.24

1.8

5.5

10.67

15.24

3.05

15.24

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28 ISDN Primary Rate Interface equipment overview

Echo canceller interface

Echo cancellers are required only on satellite transmission circuits. The echo canceller detects the length of the loop, and then cancels out reﬂected transmission. (Callers will not hear echoes of their own voices reﬂecting back to them from the far end of the call.)

The echo canceller’s control protocol must conform with that of the Tellabs Model 251. Both the echo canceller and the PRI circuit card act as Data Terminal Equipment (DTE).

QMT21 High Speed Data Module

The QMT21 High Speed Data Module supports the 64K Clear Data feature. (It allows data terminating equipment (DTE) to send and receive 64-Kb/s clear data.) The QMT21B is required for Large System to Large System conﬁgurations.

QPC720 PRI for 1.5/2.0 Mb gateway

Systems which are being used as a 1.5/2.0 Mb Gateway, one or more QPC720 (1.5 Mb) Primary Rate Interface circuit cards will also be needed.

Note: Older vintages of the QPC720 PRI cannot be used for Gateway applications. The 1.5/2.0 Mb Gateway feature requires the use of a QPC720 circuit card with ﬁrmware updated to provide modiﬁed PAD values.

Clock operation for the NT8D72

There are two types of clock operation—tracking mode and free-run mode.

Tracking mode

In tracking mode, the PRI loop supplies an external clock reference to a clock controller. Two PRI loops can operate in tracking mode, with one deﬁned as the primary reference source for clock synchronization, the other deﬁned as the secondary reference source. The secondary reference acts as a back-up to the primary reference.

As shown in Figure 6 "Clock controller primary and secondary tracking"

(page 29), a system with dual CPUs can have two clock controllers (CC-0

and CC-1). One clock controller acts as a back-up to the other. The clock controllers should be completely locked to the reference clock.

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Figure 6 Clock controller primary and secondary tracking

NT8D72 PRI2 29

Free run (non-tracking) mode

The clock synchronization of the system can operate in free-run mode if:

•

no loop is deﬁned as the primary or secondary clock reference,

•

the primary and secondary references are disabled, or

•

the primary and secondary references are in local alarm

Reference clock errors

The system software checks at intervals of 1 to 15 minutes to see if a clock controller or reference-clock error has occurred. (The interval of this check can be conﬁgured in LD 73.)

In tracking mode, at any one time, there is one active clock controller which is tracking on one reference clock. If a clock-controller error is detected, the system switches to the back-up clock controller, without affecting which reference clock is being tracked.

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30 ISDN Primary Rate Interface equipment overview

A reference-clock error occurs when there is a problem with the clock driver or with the reference clock at the far end. If the clock controller detects a reference-clock error, the reference clocks are switched.

Automatic clock recovery

A command for automatic clock recovery can be selected in LD 60 with the command EREF.

A PRI loop is disabled when it enters a local-alarm condition. If the local alarm is cleared, the loop is enabled automatically. When the loop is enabled, clock tracking is restored in the following conditions:

1. If the loop is assigned as the primary reference clock but the clock controller is tracking on the secondary reference or in free-run mode, it is restored to tracking on primary.

2. If the loop is assigned as the secondary reference clock but the clock controller is in free-run mode, it is restored to tracking on secondary.

If the clock check indicates the switch is in free-run mode:

1. Tracking is restored to the primary reference clock if deﬁned.

QPC720 PRI

Power requirements

2. If the primary reference is disabled or in local alarm, tracking is restored to the secondary reference clock if deﬁned.

Note: If the switch is put into free-run mode by the craftsperson, it will resume tracking on a reference clock unless the clock-switching option has been disabled (LD 60, command MREF), or the reference clock has been "undeﬁned" in the database.

Automatic clock switching

If the EREF command is selected in LD 60, tracking on the primary or secondary reference clock is automatically switched in the following manner:

1. If software is unable to track on the assigned primary reference clock, it switches to the secondary reference clock and sends appropriate DTC maintenance messages.

2. If software is unable to track on the assigned secondary reference clock, it switches to free run.

The QPC720 PRI card is required for PRI operation in all machine types.

The QPC720 PRI uses power and ground from the backplane. This card does not require an intelligent bus. Power requirements are:

•

+5 volts at 6 amperes

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•

+12 volts at 50 milliamperes

•

-12 volts at 50 milliamperes

QPC720 faceplate

QPC720 PRI contains ﬁve LEDs and six external connectors. Figure 7

"QPC720 PRI faceplate layout" (page 31) shows the QPC720 PRI faceplate

layout. Table 4 "QPC720 PRI external connectors" (page 31) gives information about the external connectors located on the QPC720 PRI faceplate.

Figure 7 QPC720 PRI faceplate layout

QPC720 PRI 31

Table 4 QPC720 PRI external connectors

Faceplate destination Type

J1 9-pin female, D-connector

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32 ISDN Primary Rate Interface equipment overview

Faceplate destination Type

J2 9-pin female, D-connector J3 36-pin connector J4 15-pin male, D-connector J5 15-pin male, D-connector J6 15-pin female, D-connector RCV MON Miniature bantam jack XMT MON Miniature bantam jack

QPC720 Cable requirements

Table 5 "QPC720 PRI cables and cable lengths" (page 33) lists the types of

cable used and the lengths required for external QPC720 PRI connections.

Note: No additional cabling is required fornB+D conﬁgurations. Multiple PRIs and the D-channel are associated through software in LD 17, prompt PRI.

Carrier interface

The QPC720 PRI provides an interface to the DS-1 Channel either directly, through an ofﬁce repeater, or through an Echo Canceller.

The T1 Channel Service Units listed below are compatible with the QPC720 PRI card and the 64K Clear Data feature as well as with PRI connection parameters such as the Superframe format, the Extended superframe format, and the B7 and B8ZS Alternate Mark Inversion (AMI) line coding.

•

Digital Link 551A

•

Digital Link 551C

•

Digital Link 551E

• Tellabs Model 441

•

Verilink Model 551V ST

In the U.S.A., FCC Part 68 regulations require Network Channel Terminating Equipment (for example, the NT QRY551 Channel Service Unit) installed at of the point of connection between a system and a registered common carrier trunk.

Echo Canceller interface

Echo Cancellers are required only with satellite transmission. The Echo Canceller detects the length of the loop, then cancels the reﬂected transmission (callers do not hear their own voices echoed).

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The QPC720 PRI provides both a T1 line interface and a control interface to link to a signal format compatible with EIA standard RS-232-C. Both the PRI and the Echo Canceller act as Data Terminal Equipment (DTE). The Echo Canceller’s control protocol must conform to that of the Tellabs Model 251.

64 T-link version 2 protocol

The QPC720 card supports the 64 T-link version 2 protocol. The QPC720 together with theQMT21 High Speed Data Module supports the 64K Clear Data feature. The QPC720 card provides a trunk that ties two switches together. This trunk allows 64K eClear Data to pass from the system to an outside network. The QMT21 module allows Data Terminal Equipment (DTE) to send and receive 64K Clear Data. See General Guide (553-2901-100) for more information about the 64K Clear Data feature.

Table 5 QPC720 PRI cables and cable lengths

Cable type From To

QCAD130 QPC720 QPC471/QPC775 (CC-0) QCAD130 QPC720 QPC471/QPC775 (CC-1) QCAD328A QPC720 QPC757 DCHI QCAD328B QPC720 QPC757 DCHI

QPC720 PRI 33

Meridian Link ISDN/AP

Maximum

length (feet)

7 7 6 1.8

Maximum

length

(meters)

2.13

5.5 QCAD328C QPC720 QPC757 DCHI QCAD328D QPC720 QPC757 DCHI QCAD124 QPC720 QPC414 Network QCAD128 QPC720 Bulkhead I/O panel RS-232 QPC720 Echo Canceller NTND26AA QPC720 NT6D80 MSDL NTND26AB QPC720 NT6D80 MSDL NTND26AC QPC720 NT6D80 MSDL NTND26AD QPC720 NT6D80 MSDL NTND98 QPC720 Input/output panel 22AWG ABAM Echo Canceller DSX-1

Note: The QPC775 Clock Controller is not available in the U.S.A. There can be no mixing of QPC775 and QPC471 in one system.

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35 10.67 50 15.24 50 15.24 25 7.62 50 15.24

6 1.8 18 35 10.67 50 15.24

6 1.8

655 199.64

5.5

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34 ISDN Primary Rate Interface equipment overview

Disk drive hardware

The following hardware is required for Large System upgrades:

•

3.5-inch disk drive unit

•

disk drive controller for above

•

cable for above

NT5D97 Dual-port DTI2/PRI2 card

The NT5D97 is a dual-port 2.0 Mb DTI2/PRI2 card (the DDP2 ﬁrmware functions in DTI2 or PRI2 mode, depending on DIP switch settings) that integrates the functionality of two NT8D72BA PRI2 cards, and one QPC414 ENET card into a single CE card. The NT5D97 occupies a single slot in the Network shelf and provides two DTI2/PRI2 network connections: an interface to an external D-Channel Handler (the NT6D11AF) or the NT6D80 Multipurpose Serial Data Link card, and an optional plug-on NTBK51AA Downloadable D-Channel daughterboard (DDCH) with two DCH interface ports.

The NT5D97 DDP2 card can be mixed in the same machine with PRI2 NT8D72BA cards.

The NT5D97 DDP2 card hardware design uses a B57 ASIC E1/T1 framer. The carrier speciﬁcations comply with the ANSI TI.403 speciﬁcation. The NT5D97 provides an interface to the 2.048 Mbps external digital line either directly or through an ofﬁce repeater, Network Channel Terminating Equipment (NCTE), or Line Terminating Unit (LTU).

DANGER

DANGER OF ELECTRIC SHOCK

The NT5D97 DDP2 card is not designed to be connected directly to the Public Switched Network, or other exposed plant networks. Such a connection should only be done using an isolating-type networking terminating device that provides voltage surge protection, such as a Line Terminating Unit (LTU), Network Channel Terminating Equipment (NCTE), or Network Termination 1 (NT1), as certiﬁed by your local, regional, or national safety agency and telecommunications authority.

External D-Channel Interface DCH or MSDL

The connection between the DDP2 card and the external DCH or MSDL is through a 26 pin female D type connector. The data signals conform to the electrical characteristics of the EIA standard RS-422.

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NT5D97 Dual-port DTI2/PRI2 card 35

Two control signals are used to communicate the D-channel link status to the DCH or MSDL. These are:

•

Receiver Ready (RR), originating at the DDP2 card, to indicate to the DCH or MSDL that the D-channel link is operational.

•

Transmitter Ready (TR), originating at the DCH or MSDL, to indicate to the DDP2 card that the DCH are ready to use the D-channel link.

Table 6 "DCH/MSDL Receiver Ready control signals" (page 35) indicates

how the RR control signal operates with regard to the DDP2 status.

Table 6 DCH/MSDL Receiver Ready control signals

RR State Condition

ON D-Channel data rate selected at 64 Kbps

and

PRI2 loop is enabled

OFF All other conditions

NT5D97 faceplate

Figure 8 "NT5D97 faceplate" (page 36) illustrates the faceplate layout for

the NT5D97 DDP card. The faceplate contains an enable/disable switch; a DDCH status LED; 6 x 2 trunk port status LEDs; and six external connectors. Table 7 "External connectors and LEDs" (page 36) shows the name of each connector, its designation with respect to the faceplate and the name and description of the card it is connected to. Also shown are the names of the LEDs.

and

PRI2 link is not in OOS or Local Alarm mode state

and

PRI2 link is not transmitting a Remote Alarm pattern

and

PRI2 link is not receiving a Remote Alarm Indication from a remote facility

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Figure 8 NT5D97 faceplate

Table 7 External connectors and LEDs

Faceplate

Function

Designator Type Description

Switch ENB/DIS Plastic, ESD protected Card Enable/disable

switch

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Function

NT5D97 Dual-port DTI2/PRI2 card 37

Faceplate Designator Type Description

Connectors

LEDs

Unit 0 Clock 0 RJ11 Connector Connects reference

clock 0 to Clock Controller card 0

Unit 0 Clock 1 RJ11 Connector Connects reference

clock 0 to Clock Controller card 1

Unit 1 Clock 0 RJ11 Connector Connects reference

clock 1 to Clock Controller card 0

Unit 1 Clock 1 RJ11 Connector Connects reference

clock 1 to Clock Controller card 1

J5 TRK 9 Pin

Female D Connector

J6 DCH 26 Pin

Female D Connector

ENET 2 Red LEDs ENET 0 or ENET 1 is

DIS 2 Red LEDs Trunk 0 or Trunk 1 is

OOS 2 Yellow LEDs Trunk is out of service

Two external E1 Trunk 0 and Trunk 1

Connects to external DCH or MSDL

disabled

NEA 2 Yellow LEDs Local (Near End) Alarm FEA 2 Yellow LEDs Far End Alarm LBK 2 Yellow LEDs Loop Back test being

performed on Trunk 0 or Trunk 1

DCH Bicolor Red/Green LED NTBK51AA status

The following is a brief description of each element on the faceplate.

Enable/Disable Switch

This switch is used to disable the card prior to insertion or removal from the network shelf. While this switch is in disable position, the card will not respond to the system CPU.

ENET LEDs

Two red LEDs indicate if the "ENET0" and "ENET1" portions of the card are disabled. These LEDs are lit in the following cases:

•

When the enable/disable switch is in disabled state (lit by hardware).

•

After power-up, before the card is enabled.

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38 ISDN Primary Rate Interface equipment overview

•

When the ENET port on the card is disabled by software.

Trunk Disable (DIS) LEDs

Two red LEDs indicate if the "trunk port 0" or "trunk port 1" portions of the card are disabled. These LEDs are lit in the following cases:

•

upon reception of the "disable loop" message from the software

•

after power-up

OOS LEDs

Two yellow LEDs indicate if the "trunk port 0" and "trunk port 1" portions of the card are out-of-service.

NEA LEDs

Two yellow LEDs indicate if the near end detects absence of incoming signal or loss of synchronization in "trunk port 0" or "trunk port 1" respectively. The Near End Alarm causes a Far End Alarm signal to be transmitted to the far end.

FEA LEDs

Two yellow LEDs indicate if a Far End Alarm has been reported by the far end (usually in response to a Near End Alarm condition at the far end) on "trunk port 0" or "trunk port 1".

LBK LEDs

Two yellow LEDs indicate if a remote loopback test is being performed on trunk port 0 or trunk port 1. The loopback indication is active when the digital trunk is in remote loopback mode. Normal call processing is inhibited during the remote loopback test.

DCH LED

When the dual colored LED is red, it indicates the onboard DDCH is present but disabled. When the dual colored LED is green, it indicates the onboard DDCH is present and enabled. If a DDCH is not conﬁgured on the DDP2 card, this lamp is not lit.

Unit 0 Clk Connectors

Two RJ11 connectors for connecting:

•

Digital trunk unit 0 recovered clock to primary or secondary reference source on clock controller card 0.

• Digital trunk unit 0 recovered clock to primary or secondary reference source on clock controller card 1.

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Unit 1 Clk Connectors

Two RJ11 connectors for connecting:

•

Digital trunk unit 1 recovered clock to primary or secondary reference source on clock controller card 0.

•

Digital trunk unit 1 recovered clock to primary or secondary reference source on clock controller card 1.

Connector J5 (TRK)

A 9 pin D-Type connector used to connect:

•

Digital trunk unit 0 receive and transmit Tip / Ring pairs

•

Digital trunk unit 1 receive and transmit Tip / Ring pairs

Connector J6 (DCH)

A 26-pin D-type connector is used to connect the DDP2 card to the external MSDL or D-channel handler.

System capacity and performance

Physical capacity

Each NT5D97 DDP2 card occupies one slot on the network shelf. Each card supports two digital trunk circuits and two network loops. The total number of DDP2 cards per system is limited by the number of network loops, physical capacity of the shelf, number of DTI2/PRI2 interfaces allowed by the software and the range of DCH addresses.

NT5D97 Dual-port DTI2/PRI2 card 39

D-Channel capacity

The software conﬁguration for the NTBK51AA DDCH is similar to the MSDL and only supports D-channel functionality.

The system has a total capacity of 16 addresses (Device Addresses or DNUM) that can be reserved for DCH card, MSDL card or DDCH card. One exception is DNUM 0 which is commonly assigned to the TTY terminal.

No two different D-Channel providers can share the same DNUM. Hence, the combined maximum number of DCH, MSDL and DDCH cards in the system is 16.

The DCH has one D-Channel unit, the DDCH has two D-Channel units, and the MSDL has a maximum of four units. Therefore, the total number of D-Channel is derived by the following formula:

Total_Num_DCH-Units = Num_DCHx1 + Num_DDCHx2 + Num_MSDLx4 Therefore, Total_Num_DCH-Units in any given system is between 0-63.

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40 ISDN Primary Rate Interface equipment overview

CPU capacity

Using a NT5D97 DDP2 card instead of DTI2/PRI2 cards does not increase the load on the system CPU. The DDP2 replaces an ENET card and two DTI2/PRI2 cards. Emulating the ENET card and the overall CPU capacity is not impacted by using a DDP2 card instead of a DTI2/PRI2 card.

Power requirements

Table 8 "NT5D97 DDP2 power requirements" (page 40) lists the power

requirements for the NT5D97 DDP2 card.

Table 8 NT5D97 DDP2 power requirements

Voltage

+5V Backplane 3A 3.8A +12V Backplane 25mA 75mA

-12V Backplane 25mA 75mA Total Power (Maximum) 15.6W 20.8W

Testability and diagnostics

The DDP2 card supports testing and maintenance functions through the following procedures:

•

Self test upon power up or reset

•

Signalling test performed in the LD 30

•

Loopback tests, self tests, and continuity tests performed by LD 60 and LD 45

•

The D-Channel (DCH, MSDL, DDCH) maintenance is supported by LD 96.

Source Current

DDP2

(without

NTBK51AA)

DDP2

(with

NTBK51AA)

Note: The MSDL selftest is not applicable to the NTBK51AA D-Channel daughterboard.

Cable requirements

This section lists the types of cable used and the lengths required for internal and external NT5D97 DDP2 connections.

Note: No additional cabling is required fornB+D conﬁgurations. Multiple DDP2 cards and the D-channel are associated through software in LD 17.

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NT5D97 Dual-port DTI2/PRI2 card 41

DDP2 cable assemblies include:

•

E1 carrier cables — NTCK45AA (A0407956) — NT8D7217 (A0617192) — NTCK78AA (A0618294) — NTCK79AA (A0618296)

•

DDP2 to QPC471/QPC775 Clock Controller Cables — NTCG03AA — NTCG03AB — NTCG03AC — NTCG03AD

•

DDP2 to DCH cables — NTCK46AA — NTCK46AB — NTCK46AC — NTCK46AD

•

DDP2 to MSDL cables — NTCK80AA — NTCK80AB — NTCK80AC — NTCK80AD

A description of each type of DDP2 cable follows.

E1 carrier cables

NTCK45AA (A0407956) The NTCK45AA (8 ft.) is an 120W cable for systems equipped with an I/O ﬁlter panel, connecting the TRK port (P1, D-type 9 pin male) on the DDP2 faceplate to the I/O ﬁlter (P2, P3 D-type 9 pin males).

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42 ISDN Primary Rate Interface equipment overview

Figure 9 NTCK45AA

Table 9 "NTCK45AA cable pins" (page 42) lists the pin attributes for the

NTCK45AA cable.

Table 9 NTCK45AA cable pins

Cable Name Description Color

0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1

T-PRI0TX Trunk 0 Transmit Tip Black P1-1 P2-6 R-PRI0TX Trunk 0 Transmit Ring Red P2-2 P2-7 T-PRI0RX Trunk 0 Receive Tip Black P1-3 P2-2 R-PRI0RX Trunk 0 Receive Ring White P1-4 P2-3

GND Shield Wire Bare N/C Case P2 GND Shield Wire Bare N/C Case P2 Standard Wire (3") Bare Case P2 P2-5

Standard Wire (3") Bare Case P2 P2-9 T-PRI1TX Trunk 1 Transmit Tip Black P1-5 P3-6 R-PRI1TX Trunk 1 Transmit Ring Red P1-6 P3-7 T-PRI1RX Trunk 1 Receive Tip Black P1-7 P3-2 R-PRI1RX Trunk 1 Receive Ring White P1-8 P3-3

GND Shield Wire Bare N/C Case P3

Standard Wire (3") Bare Case P3 P3-5

Standard Wire (3") Bare Case P3 P3-9

DDP2 pins

I/O Panel pins

NT8D7217 (A0617192) The NT8D7217 (50 ft.) is a 120W cable for systems equipped with an I/O ﬁlter panel, connecting the 9 pin I/O ﬁlter connector to the 9 pin NCTE connector.

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Figure 10 NT8D7217

Table 10 "NT8D7217 cable pins" (page 43) which follows lists the pin

attributes for the NT8D7217 cable.

Table 10 NT8D7217 cable pins

NT5D97 Dual-port DTI2/PRI2 card 43

Cable Name Description Color

0 0 0 0 0 0 1 1 1 1 1 1

T-PRI0TX Trunk 0 Transmit Tip Black P1-6 P2-6 R-PRI0TX Trunk 0 Transmit Ring White P1-7 P2-7 T-PRI0RX Trunk 0 Receive Tip Black P1-2 P2-2 R-PRI0RX Trunk 0 Receive Ring Red P1-3 P2-3

GND Shield Wire Bare P1-5 N/C

GND Shield Wire Bare P1-9 N/C T-PRI1TX Trunk 1 Transmit Tip Black P1-6 P2-6 R-PRI1TX Trunk 1 Transmit Ring White P1-7 P2-7 T-PRI1RX Trunk 1 Receive Tip Black P1-2 P2-2 R-PRI1RX Trunk 1 Receive Ring Red P1-3 P2-3

GND Shield Wire Bare P1-5 N/C

GND Shield Wire Bare P1-9 N/C

NTCK78AA (A0618294) The NTCK78AA (50 ft.) is a 120W cable for connecting the TRK port on the DDP2 faceplate (P1, D-type 9 pin male) to the Main Distribution Frame (MDF) (P2, P3 D-type 15-pin males). The NTCK78AA is used for systems not equipped with an I/O ﬁlter panel.

DDP2 pins

I/O Panel pins

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Figure 11 NTCK78AA

Table 11 "NTCK78AA cable pins" (page 44) lists the pin attributes for the

NTCK78AA cable.

Table 11 NTCK78AA cable pins

Cable Name Description Color

0 0 0 0 0 0 1 1 1 1 1 1

T-PRI0TX Trunk 0 Transmit Tip Black P1-1 P2-1 R-PRI0TX Trunk 0 Transmit Ring Red P1-2 P2-9 T-PRI0RX Trunk 0 Receive Tip Black P1-3 P2-3 R-PRI0RX Trunk 0 Receive Ring White P1-4 P2-11

GND Shield Wire Bare P1 Case P2-2

GND Shield Wire Bare P1 Case P2-4 T-PRI1TX Trunk 1 Transmit Tip Black P1-5 P3-1 R-PRI1TX Trunk 1 Transmit Ring Red P1-6 P3-9 T-PRI1RX Trunk 1 Receive Tip Black P1-7 P3-3 R-PRI1RX Trunk 1 Receive Ring White P1-8 P3-11

GND Shield Wire Bare P1 Case P3-2

GND Shield Wire Bare P1 Case P3-4

NTCK79AA (A0618296) The NTCK79AA (40 ft) is a 75W coaxial cable for connecting the TRK port on the DDP2 faceplate (P1, D-type 9 pin male) to the Line Terminating Unit (LTU) (P2, P3, P4, P5 BNC males).

DDP2 pins

NCTE pins

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Figure 12 NTCK79AA

Table 12 "NTCK79AA cable pins" (page 45) lists the pin attributes for the

NTCK79AA cable.

Table 12 NTCK79AA cable pins

NT5D97 Dual-port DTI2/PRI2 card 45

Cable Name Description Color

0 0

0 1

1 1

1 1 1

T-PRI0TX Trunk 0 Transmit Tip Red P1-1 P2 inner

R-PRI0TX Trunk 0 Transmit Ring Red P1-2 P2 shield T-PRI0RX Trunk 0 Receive Tip Green P1-3 P3 inner

R-PRI0RX Trunk 0 Receive Ring Green P1-4 P3 shield T-PRI1TX Trunk 1 Transmit Tip Red P1-5 P4 inner

R-PRI1TX Trunk 1 Transmit Ring Red P1-6 P4 shield T-PRI1RX Trunk 1 Transmit Tip Green P1-7 P5 inner

R-PRI1RX Trunk 1 Receive Ring Green P1-8 P5 shield

Outer metalized PVC shield Bare N/C P1 Case

3 stranded wire Bare N/C P1 Case

Reference clock cables

The NTCG03AA (14 ft), NTCG03AB (2.8 ft), NTCG03AC (4.0 ft), or NTCG03AD (7 ft), is a DDP2 card to Clock Controller cable, connecting each of the CLK0 or CLK1 ports on the DDP2 faceplate to the primary or secondary source ports on Clock Controller card 0 or 1.

DDP2 pins

NCTE pins

conductor

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Figure 13 NTCG03AA/AB/AC/AD

MSDL/DCH cables

External DCH cable The NTCK46 cable connects the DDP2 card to the

NT6D11AF/NT5K75AA/NT5K35AA D-Channel Handler card. The cable is available in four different sizes:

•

NTCK46AA (6 ft.) - DDP2 to DCH cable

•

NTCK46AB (18 ft.) - DDP2 to DCH cable

•

NTCK46AC (35 ft.) - DDP2 to DCH cable

•

NTCK46AD (50 ft.) - DDP2 to DCH cable

Figure 14 NTCK46AA/AB/AC/AD

External MSDL cable The NTCK80 cable connects the DDP2 card to the

NT6D80 MSDL card. The cable is available in four different sizes:

•

NTCK80AA (6 ft) - DDP2 to MSDL cable

•

NTCK80AB (18 ft) - DDP2 to MSDL cable

•

NTCK80AC (35 ft) - DDP2 to MSDL cable

•

NTCK80AD (50 ft) - DDP2 to MSDL cable

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Figure 15 NTCK80AA/AB/AC/AD

Cable diagrams

Figure 16 "DDP2 cable for systems with an I/O panel" (page 48) and Figure 17 "DDP2 cable for systems without an I/O panel" (page 49) provide

examples of typical cabling conﬁgurations for the DDP2.

Figure 16 "DDP2 cable for systems with an I/O panel" (page 48) shows a

typical DDP2 cabling for a system with an I/O panel, with the connection between the I/O panel and a Network Channel Terminating Equipment (NCTE).

NT5D97 Dual-port DTI2/PRI2 card 47

Figure 17 "DDP2 cable for systems without an I/O panel" (page 49) shows

cabling for a system without an I/O panel. Here, the DDP2 faceplate is cabled directly to the NCTE.

Note: Since several clock cabling options exist, none has been represented in the diagrams. Refer to "Clock conﬁgurations" (page

52) for a description on each available option.

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Figure 16 DDP2 cable for systems with an I/O panel

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Figure 17 DDP2 cable for systems without an I/O panel

NT5D97 Dual-port DTI2/PRI2 card 49

Clock for the NT5D97

Clock operation

There are two types of clock operation — tracking mode and free-run mode.

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Tracking mode In tracking mode, the DDP2 loop supplies an external clock reference to a clock controller. Two DDP2 loops can operate in tracking mode, with one deﬁned as the primary reference source for clock synchronization, the other deﬁned as the secondary reference source. The secondary reference acts as a back-up to the primary reference.

As shown in Figure 18 "Clock Controller primary and secondary tracking"

(page 50), a system with dual CPUs can have two clock controllers (CC-0

and CC-1). One clock controller acts as a back-up to the other. The clock controllers should be completely locked to the reference clock.

Figure 18 Clock Controller primary and secondary tracking

Free run (non-tracking) mode The clock synchronization of the system can operate in free-run mode if:

• no loop is deﬁned as the primary or secondary clock reference,

•

the primary and secondary references are disabled, or

•

the primary and secondary references are in local (near end) alarm

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NT5D97 Dual-port DTI2/PRI2 card 51

Reference clock errors

The system software checks at intervals of 1 to 15 minutes to see if a clock controller or reference-clock error has occurred. (The interval of this check can be conﬁgured in LD 73).

In tracking mode, at any one time, there is one active clock controller which is tracking on one reference clock. If a clock controller error is detected, the system switches to the back-up clock controller, without affecting which reference clock is being tracked.

Automatic clock recovery

A command for automatic clock recovery can be selected in LD 60 with the command EREF.

A DDP2 loop is disabled when it enters a local-alarm condition. If the local alarm is cleared, the loop is enabled automatically. When the loop is enabled, clock tracking is restored in the following conditions:

•

If the loop is assigned as the primary reference clock but the clock controller is tracking on the secondary reference or in free-run mode, it is restored to tracking on primary.

•

If the loop is assigned as the secondary reference clock but the clock controller is in free-run mode, it is restored to tracking on secondary.

•

If the clock check indicates the switch is in free-run mode: — Tracking is restored to the primary reference clock if deﬁned. — If the primary reference is disabled or in local alarm, tracking is

restored to the secondary reference clock if deﬁned.

Note: If the system is put into free-run mode by the craftsperson, it resumes tracking on a reference clock unless the clock-switching option is disabled (LD 60, command MREF), or the reference clock is "undeﬁned" in the database.

Automatic clock switching

If the EREF command is selected in LD 60, tracking on the primary or secondary reference clock is automatically switched in the following manner:

•

If software is unable to track on the assigned primary reference clock, it switches to the secondary reference clock and sends appropriate DTC maintenance messages.

•

If software is unable to track on the assigned secondary reference clock, it switches to free run.

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Clock conﬁgurations

Clock Controllers can be used in a single or a dual CPU system. A single CPU system has one Clock Controller card. This card can receive

reference clocks from two sources referred to as the primary and secondary sources. These two sources can originate from a PRI2, DTI2, etc. PRI2 cards such as the NT8D72BA are capable of supplying two references of the same clock source. These are known as Ref1 (available at J1) and Ref2 (available at J2) on the NT8D72BA.

The NT5D12 card is capable of supplying two references from each clock source, i.e., four references in total. NT5D12 can supply Clk0 and Clk1 from Unit 0 and Clk0 and Clk1 from Unit 1. Either Unit 0 or Unit 1 can originate primary source, as shown in Figure 19 "Clock Controller - Option 1" (page

54) through Figure 22 "Clock Controller - Option 4" (page 57) on pages Figure 18 "Clock Controller primary and secondary tracking" (page 50) to Figure 22 "Clock Controller - Option 4" (page 57).

There is one Clock Controller cable required for the DDP2 card, which is available in four sizes; this is the NTCG03AA/AB/AC/AD. Refer to

"Reference clock cables" (page 45) for more information. Table 13 "Clock Controller options - summary" (page 52) summarizes the

clocking options. Table 14 "Clock Controller options - description" (page

53) explains the options in more detail.

Table 13 Clock Controller options - summary

CC Option CPU Type

Option 1 Single Ref from P0 on Clk0

Option 2 Dual Ref from P0 on Clk0

Option 3 Dual Ref from P1 on Clk0

Option 4 Dual Ref from P0 on Clk0

Notes

Ref from P1 on Clk0

Ref from P0 on Clk1

Ref from P1 on Clk1

Ref from P0 on Clk1

Ref from P1 on Clk0

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Ref from P1 on Clk1

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Table 14 Clock Controller options - description

NT5D97 Dual-port DTI2/PRI2 card 53

Clock Option

Notes

Option 1 This option provides a single CPU system with 2 clock

sources derived from the 2 ports of the DDP2.

Connector Clk0 provides a clock source from Unit 0.

Connector Clk0 provides a clock source from Unit 1.

Refer to Figure 19 "Clock Controller - Option 1" (page

54).

Option 2 This option provides a Dual CPU system with 2

references of a clock source derived from port 0 of the DDP2.

Connector Clk0 provides a Ref 1 clock source from Unit 0.

Connector Clk1 provides a Ref 2 clock source from Unit 0.

Refer to Figure 20 "Clock Controller - Option 2" (page

55)

Option 3 This option provides a Dual CPU system with 2

Option 4 This option provides a Dual CPU system with 2

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references of a clock source derived from port 1 of the DDP2.

Connector Clk0 provides a Ref 1 clock source from Unit 1.

Connector Clk1 provides a Ref 2 clock source from Unit 1.

Refer to Figure 21 "Clock Controller - Option 3" (page

56)

references from each clock source derived from the DDP2.

Connector Clk0 provides a Ref 1 clock source from Unit 0.

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54 ISDN Primary Rate Interface equipment overview

Clock Option

Figure 19 Clock Controller - Option 1

Notes

Connector Clk1 provides a Ref 2 clock source from Unit 0.

Connector Clk0 provides a Ref 1 clock source from Unit 1.

Connector Clk1 provides a Ref 2 clock source from Unit 1.

Refer to Figure 22 "Clock Controller - Option 4" (page

57).

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Figure 20 Clock Controller - Option 2

NT5D97 Dual-port DTI2/PRI2 card 55

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56 ISDN Primary Rate Interface equipment overview

Figure 21 Clock Controller - Option 3

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Figure 22 Clock Controller - Option 4

NT5D12 Dual-port DTI/PRI 57

NT5D12 Dual-port DTI/PRI

The NT5D12 is a dual-port 1.5 DTI/PRI card (the DDP ﬁrmware functions in DTI or PRI mode) integrating the functionality of two QPC472 DTI/DDP2 PRI cards and one QPC414 ENET into one card. The NT5D12 occupies a single Network shelf slot and provides two DTI/PRI network connections, an optional connection to an external D-Channel Handler, the QPC757 D-Channel Handler Interface (DCHI) or NT6D80 Multipurpose Serial Data Link (MSDL), and an optional plug-on NTBK51AA Downloadable D-Channel daughterboard (DDCH.)

The NT5D12 DDP card supports all features (except the echo canceller and protocol conversion) of the QPC720. In addition, it maintains the backward compatibility of QPC720.

The NT5D12 DDP card hardware design uses a B57 ASIC E1/T1 framer. The carrier speciﬁcations comply with the ANSI TI.403 speciﬁcation. The NT5D12 provides an interface to the 1.5 Mb external digital line either directly or through an ofﬁce repeater, Line Terminating Unit (LTU), or Channel Service Unit (CSU).

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D-Channel and MSDL interface

The connection between the DDP card and the DCHI or MSDL is via a 26 pin female D type connector. The data signals conform to the electrical characteristics of the EIA standard RS-422.

Two control signals are used to communicate the D-Channel link status to the DCHI or MSDL. These are:

•

Receiver Ready (RR), originating at the DDP card, to indicate to the DCHI or MSDL that the D-channel link is operational.

•

Transmitter Ready (TR), originating at the DCHI or MSDL, to indicate to the DDP card that the DCHI or MSDL are ready to use the D-Channel link.

Table 15 "DCHI/MSDL Receiver Ready control signals" (page 58) indicates

how the RR control signal operates with regard to the DDP status.

Table 15 DCHI/MSDL Receiver Ready control signals

RR State Condition

ON D-Channel data rate selected at 64 Kbps or 56 Kbps or 64 Kbps

inverted

and

PRI loop is enabled

and

PRI link is not in RED alarm mode state

and

PRI link is not transmitting a yellow alarm pattern

and

PRI link is not receiving a Remote Alarm Indication from the remote facility

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and

PRI link is not in FA3 mode

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RR State Condition

OFF All other conditions

NT5D12 faceplate

Figure 23 "NT5D12 faceplate - general view" (page 60) and Figure 24 "DDP faceplate - detailed view" (page 61) illustrate the faceplate layout

for the NT5D12 DDP card. The faceplate contains an enable/disable switch; a DDCH status LED; 6 x 2 trunk port status LEDs; and six external connectors. Table 7 "External connectors and LEDs" (page 36) shows the name of each connector, its designation with respect to the faceplate and the name and description of the card it is connected to. Also shown are the names of the LEDs.

NT5D12 Dual-port DTI/PRI 59

and

Transmitter Ready (TR) control signal from the DCHI/MSDL is ON

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Figure 23 NT5D12 faceplate - general view

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Figure 24 DDP faceplate - detailed view

NT5D12 Dual-port DTI/PRI 61

Table 16 External connectors and LEDs

Faceplate

Function

Designator Type Description

Switch ENB/DIS Plastic, ESD

protected

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Card Enable/disable switch

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Faceplate

Function

Connectors

Designator Type Description

Port 0 Clock 0 RJ11 Connector Connects reference clock to

Port 0 Clock 1 RJ11 Connector Connects reference clock to

Port 1 Clock 0 RJ11 Connector Connects reference clock to

Port 1 Clock 1 RJ11 Connector Connects reference clock to

Clock Controller card

LEDs

J5 TRK 9 Pin Female

D Connector

J6 DCH 26 Pin Female

D Connector OOS 2 Red LEDs ENET 0 or ENET 1 disabled DIS 2 Red LEDs Trunk 0 or Trunk 1 disabled ACT 2 Green LEDs Trunk 0 or Trunk 1 lines active RED 2 Red LEDs Red Alarm on Trunk 0 or Trunk 1 YEL 2 Yellow LEDs Yellow Alarm on Trunk 0 or Trunk

LBK 2 Green LEDs Loop Back test being performed

DCH Bicolor Red/Green LED NTBK51AA status

Two external DS-1 Trunk 0 and Trunk 1

Connects to DCHI or MSDL

on Trunk 0 or Trunk 1

The following is a brief description of each element on the faceplate:

Enable/Disable Switch

This switch is used to disable the card prior to insertion or removal from the network shelf; while this switch is in disable position, the card will not respond to system CPU.

Port Out of Service LEDs

Two red LEDs indicate if the "ENET0" and "ENET1" portion of the card are disabled. These LEDs are lit in the following cases:

•

When the enable/disable switch is in state disable (lit by hardware)

•

After power-up, before the card is enabled

•

When the ENET port on the card is disabled by software.

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NT5D12 Dual-port DTI/PRI 63

Trunk Port Disable LEDs

Two red LEDs indicate if the "trunk port 0" and "trunk port 1" portion of the card are disabled. These LEDs are turned on in the following cases:

•

When the enable/disable switch is in state disable (lit by hardware).

•

After power-up, before the card is enabled.

•

When digital trunk interface on the card is deactivated by software.

ACT LEDs

Two green LEDs indicate if the "trunk port 0" and "trunk port 1" portion of the card is active.

RED LEDs

Two red LEDs indicate if the near end detects absence of incoming signal or loss of synchronization in "trunk port 0" or "trunk port 1" respectively. The Near End Alarm causes a Far End Alarm signal to be transmitted to the far end.

YEL LEDs

Two yellow LEDs indicate if a Far End Alarm has been reported by the far end (usually in response to a Near End Alarm condition at the far end) on "trunk port 0" or "trunk port 1".

LBK LEDs

Two green LEDs indicate the remote loopback test is being performed on trunk port 0 or trunk port 1. The loopback indication is active when the digital trunk is in remote loopback mode (T1 signals received from the far end are regenerated and transmitted to the far end.) Normal call processing is inhibited during remote loopback test.

DCH LED

A dual color red/green LED indicates that the onboard DDCH is present but disabled (red), or is present and enabled (green). If a DDCH is not conﬁgured on the DDP card, this lamp is not lit.

Port 0 Clk Connectors

Two RJ11 connectors for connecting:

•

Digital trunk port 0 recovered clock to primary or secondary reference source on clock controller card 0.

•

Digital trunk port 0 recovered clock to primary or secondary reference source on clock controller card 1.

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Port 1 Clk Connectors

Two RJ11 connectors for connecting:

•

Digital trunk port 1 recovered clock to primary or secondary reference source on clock controller card 0.

•

Digital trunk port 1 recovered clock to primary or secondary reference source on clock controller card 1.

Connector J5 (TRK)

A 9 pin D-Type connector used to connect:

•

Digital trunk port 0 receive and transmit Tip / Ring pairs.

•

Digital trunk port 1 receive and transmit Tip / Ring pairs.

Connector J6 (DCH)

A 26 pin D-type connector, used to connect the DDP card to MSDL or QPC757 external D-channel handlers.

System capacity and performance

Physical capacity

Each DDP card occupies one slot on the network shelf. It supports two digital trunk circuits and two network loops. The total number of DDP cards per system is limited by the number of network loops, physical capacity of the shelf, number of DTI/PRI interfaces allowed by the software and the range of DCH addresses.

D-Channel capacity

The software conﬁguration for the NTBK51AA DDCH is similar to the MSDL. It is both physical and logical, and supports D-Channel functionality only.

The system has a total capacity of 16 addresses (Device Addresses or DNUM) that can be reserved for DCHI card, MSDL card or DDCH card. One exception is DNUM 0 which is commonly assigned to the System Monitor.

No two different D-Channel providers can share the same DNUM. Hence, the combined maximum number of DCHI, MSDL and DDCH cards in the system is 16.

The DCHI and DDCH have two D-Channel units, the MSDL has four. Thereforethe total number of D-Channels is derived by the followingformula:

Total_Num_DCH-Units = Num_DCHIx2 + Num_DDCHx2 + Num_MSDLx4 Therefore, Total_Num_DCH-Units in any given system is between 0-63.

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CPU capacity

Using a NT512 DDP card instead of DTI/PRI cards does not increase the load on the system CPU. The DDP replaces an ENET card and two DTI/PRI cards, it emulates the ENET card and the overall CPU capacity is not impacted by usage of DDP card instead of a DTI/PRI card.

Power requirements

Table 17 "DDP power requirements" (page 65) lists the power requirements

for the DDP card.

Table 17 DDP power requirements

NT5D12 Dual-port DTI/PRI 65

Voltage

+5V Backplane 3A 3.8A +12V Backplane 25mA 75mA

-12V Backplane 25mA 75mA Total Power (Maximum) 15.6W 20.8W

Testability and diagnostics

The DDP card supports all current QPC720 testing and maintenance functions through the following procedures:

•

Self test upon power up or reset;

•

Signaling test performed in the LD 30;

•

Loopback tests, self tests, and continuity tests performed by LD 60 and LD 45;

•

The D-Channel (MSDL, DCHI, DDCH) maintenance is supported by LD 96.

NT5D12 Cable requirements

This section lists the types of cable used and the lengths required for internal and external NT5D12 DDP connections.

Source Current

DDP (without

NTBK51AA)

DDP (with

NTBK51AA)

Note 1: No additional cabling is required for nB+D conﬁgurations. Multiple DDPs and the D-channel are associated through software in LD 17.

Note 2: A detailed discussion of each type of DDP cable listed below follows.

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New DDP cable assemblies include:

•

System Trunk Tip/Ring Cables — NT5D16AA — NT5D17AA — QCAD133

•

DDP to QPC471/QPC775 Clock Controller Cables — NTCG03AA — NTCG03AB — NTCG03AC — NTCG03AD

•

DDP to DCHI cables — NTCK46AA — NTCK46AB — NTCK46AC — NTCK46AD

•

DDP to MSDL cables — NTCK80AA — NTCK80AB — NTCK80AC — NTCK80AD

Trunk Tip/Ring cables

NT5D16AA

The NT5D16AA (8 ft.) is a 100W cable for systems equipped with an I/O ﬁlter panel, connecting the 9 pin D-type TRK port on the DDP faceplate to the I/O ﬁlter.

Note: On the I/O panel side, this cable is equipped with a monitor bantam plug and a 15 pin D-type trunk connector mounted on a small PCB. There are no bantam plugs on the DDP faceplate.

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NT5D12 Dual-port DTI/PRI 67

Figure 25 NT5D16AA

Table 18 "NT5D16AA cable pins" (page 67) lists the pin attributes for the

NT5D16AA cable.

Table 18 NT5D16AA cable pins

Cable Name Description Color

0 0 1

T-PRI0TX Trunk 0 Transmit Tip Black J5-1 P0J3-1

R-PRI0TX Trunk 0 Transmit Ring Red J5-2 P0J3-9

T-PRI0RX Trunk 0 Receive Tip Black J5-3 P0J3-3

R-PRI0RX Trunk 0 Receive Ring White J5-4 P0J3-11

GND Shield Wire Bare N/C Case P0 GND Shield Wire Bare N/C Case P0

T-PRI1TX Trunk 1 Transmit Tip Black J5-5 P1J3-1

R-PRI1TX Trunk 1 Transmit Ring Red J5-6 P1J3-9

T-PRI1RX Trunk 1 Receive Tip Black J5-7 P1J3-3

DDP pins (J5)

I/O Panel pins (J2, J3)

P0J2-3

P0J2-9

P0J2-4

P0J2-10

P1J2-3

P1J2-9

P1J2-4

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Cable Name Description Color

1 1

R-PRI1RX Trunk 1 Receive Ring White J5-8 P1J3-11

GND Shield Wire Bare N/C Case P1 GND Shield Wire Bare N/C Case P1

Reference clock cables

The NTCG03AA (14 ft.), NTCG03AB (2.8 ft.), NTCG03AC (4.0 ft.), or NTCG03AD (7 ft.) is a DDP card to Clock Controller cable, connecting each of the CLK0 or CLK1 ports on the DDP faceplate to the primary or secondary source ports on Clock Controller card 0 or 1.

Figure 26 NTCG03AA, NTCG03AB, NTCG03AC, or NTCG03AD

DDP pins (J5)

I/O Panel pins (J2, J3)

P1J2-10

MSDL/DCHI cables

External DCHI cable

The NTCK46 cable connects the DDP card to the QPC757 DCHI D-Channel Handler card. The cable is available in four different sizes:

•

NTCK46AA (6 ft.) - DDP to DCHI cable

•

NTCK46AB (18 ft.) - DDP to DCHI cable

•

NTCK46AC (35 ft.) - DDP to DCHI cable

•

NTCK46AD (50 ft.) - DDP to DCHI cable

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NT5D12 Dual-port DTI/PRI 69

Figure 27 NTCK46AA, NTCK46AB, NTCK46AC, NTCK46AD

External MSDL cable

The NTCK80 cable connects the DDP card to the NT6D80 MSDL card. The cable is available in four different sizes:

•

NTCK80AA (6 ft.) - DDP to MSDL cable

•

NTCK80AB (18 ft.) - DDP to MSDL cable

• NTCK80AC (35 ft.) - DDP to MSDL cable

•

NTCK80AD (50 ft.) - DDP to MSDL cable

Figure 28 NTCK80AA, NTCK80AB, NTCK80AC, NTCK80AD

Cable diagrams

Figure 29 "DDP cable for systems with an I/O panel" (page 70) provides an

example of a typical cabling conﬁguration for the DDP. Please note that these ﬁgures are representational only, and are not intended to show the relational card slot position of the various cards.

Figure 29 "DDP cable for systems with an I/O panel" (page 70) shows

a typical DDP cabling for a system Option with an I/O panel, with the connection between the I/O panel and a Network Channel Terminating Equipment (NCTE).

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70 ISDN Primary Rate Interface equipment overview

Note: Since there exists several clock cabling options, none has been represented in the diagram. Please refer to "Clock conﬁgurations" (page

72) for a description on each available option.

Figure 29 DDP cable for systems with an I/O panel

Clock

There are two types of clock operation - tracking mode and free-run mode.

Tracking mode

In tracking mode, the DDP loop supplies an external clock reference to a clock controller. Two DDP loops can operate in tracking mode, with one deﬁned as the primary reference source for clock synchronization, the other deﬁned as the secondary reference source. The secondary reference acts as a back-up to the primary reference.

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As shown in Figure 30 "Clock Controller primary and secondary tracking"

(page 71), a system with dual CPUs can have two clock controllers (CC-0

and CC-1). One clock controller acts as a back-up to the other. Lock the clock controllers to the reference clock.

Figure 30 Clock Controller primary and secondary tracking

NT5D12 Dual-port DTI/PRI 71

Free run (non-tracking) mode

The clock synchronization of the system can operate in free-run mode if:

•

no loop is deﬁned as the primary or secondary clock reference,

•

the primary and secondary references are disabled, or

•

the primary and secondary references are in local (near end) alarm.

Reference clock errors

The system software checks at intervals of 1 to 15 minutes to see if a clock controller or reference-clock error has occurred. (The interval of this check can be conﬁgured in LD 73.)

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Automatic clock recovery

A command for automatic clock recovery can be selected in LD 60 with the command EREF.

A DDP loop is disabled when it enters a local-alarm condition. If the local alarm is cleared, the loop is enabled automatically. When the loop is enabled, clock tracking is restored in the following conditions:

•

If the loop is assigned as the primary reference clock but the clock controller is tracking on the secondary reference or in free-run mode, it is restored to tracking on primary.

•

If the loop is assigned as the secondary reference clock but the clock controller is in free-run mode, it is restored to tracking on secondary.

• If the clock check indicates the switch is in free-run mode: — Tracking is restored to the primary reference clock if deﬁned. — If the primary reference is disabled or in local alarm, tracking is

restored to the secondary reference clock if deﬁned.

Automatic clock switching

If the EREF command is selected in LD 60, tracking on the primary or secondary reference clock is automatically switched in the following manner:

•

If software is unable to track on the assigned primary reference clock, it switches to the secondary reference clock and sends appropriate DTC maintenance messages.

•

If software is unable to track on the assigned secondary reference clock, it switches to free run.

Clock conﬁgurations

Clock Controllers can be used in a single or a dual CPU system.

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NT5D12 Dual-port DTI/PRI 73

A single CPU system has one Clock Controller card. This card can receive reference clocks from two sources referred to as the primary and secondary sources. These two sources can originate from a PRI, DTI, etc. PRI cards such as the QPC720 are capable of supplying two references of the same clock source. These are knownas Ref1 (available at J1) and Ref2 (available at J2) on the QPC720.

The NT5D12 card is capable of supplying two references from each clock source, i.e., four references in total. NT5D12 can thus supply Clk0 and Clk1 from Port 0 and Clk0 and Clk1 from Port 1. Either Port 0 or Port 1 can originate the primary source, as shown in Figure 31 "Clock Controller -

Option 1" (page 75) through Figure 34 "Clock Controller - Option 4" (page

78) to Figure 34 "Clock Controller - Option 4" (page 78).

There is one new Clock Controller cable required for the new DDP card, which is available in four sizes; this is the NTCG03AA/AB/AC/AD. Refer to

"Reference clock cables" (page 68) for more information. "Reference clock cables" (page 45) summarizes the clock options. Table

20 "Clock Controller options - description" (page 74) explains the options in

more detail.

Table 19 Clock Controller options- summary

CC Option CPU Type

Option 1 Single Ref from P0 on Clk0

Option 2 Dual Ref from P0 on Clk0

Option 3 Dual Ref from P1 on Clk0

Option 4 Dual Ref from P0 on Clk0

Notes

Ref from P1 on Clk0

Ref from P0 on Clk1

Ref from P1 on Clk1

Ref from P0 on Clk1

Ref from P1 on Clk0

Ref from P1 on Clk1

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Table 20 Clock Controller options - description

Clock Option

Notes

Option 1 This option provides a single CPU system with 2 clock sources

derived from the 2 ports of the DDP.

Connector Clk0 provides a clock source from Port 0.

Connector Clk0 provides a clock source from Port 1.

Refer to Figure 31 "Clock Controller - Option 1" (page 75)

Option 2 This option provides a Dual CPU system with 2 references of a

clock source derived from port 0 of the DDP.

Connector Clk0 provides a Ref 1 clock source from Port 0.

Connector Clk1 provides a Ref 2 clock source from Port 0.

Refer to Figure 32 "Clock Controller - Option 2" (page 76)

Option 3 This option provides a Dual CPU system with 2 references of a

clock source derived from port 1 of the DDP.

Connector Clk0 provides a Ref 1 clock source from Port 1.

Connector Clk1 provides a Ref 2 clock source from Port 1.

Refer to Figure 33 "Clock Controller - Option 3" (page 77)

Option 4 This option provides a Dual CPU system with 2 references from

each clock source derived from the DDP.

Connector Clk0 provides a Ref 1 clock source from Port 0.

Connector Clk1 provides a Ref 2 clock source from Port 0.

Connector Clk0 provides a Ref 1 clock source from Port 1.

Connector Clk1 provides a Ref 2 clock source from Port 1.

Refer to Figure 34 "Clock Controller - Option 4" (page 78)

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Figure 31 Clock Controller - Option 1

NT5D12 Dual-port DTI/PRI 75

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Figure 32 Clock Controller - Option 2

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Figure 33 Clock Controller - Option 3

NT5D12 Dual-port DTI/PRI 77

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Figure 34 Clock Controller - Option 4

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DCH installation

The section contains information on the following topics:

"Install the NT6D11AB, NT6D11AE, NT6D11AF DCH" (page 79) "Install the NT6D11AB, NT6D11AE, NT6D11AF DCH" (page 79) "Set up the NT6D11AB, NT6D11AE, NT6D11AF DCHI" (page 80)

"DIP switch settings" (page 80) "Protocol selection" (page 80) "Valid switch combinations" (page 81) "Jumper settings" (page 82) "Port addressing modes" (page 83) "Port address switch settings" (page 84)

"Install the NT6D11AB, NT6D11AE, NT6D11AF DCHI" (page 85)

"Remove the NT6D11AB, NT6D11AE, NT6D11AF DCH" (page 86) "Install the QPC757 DCH" (page 87)

"Port address switch settings" (page 89) "D-channel parameter downloading" (page 90) "Remove the QPC757 DCHI" (page 90)

Install the NT6D11AB, NT6D11AE, NT6D11AF DCH

Installation procedures for the NT6D11AB, NT6D11AE, and NT6D11AE DCHI cards are the same for all Large Systems. These instructions apply to hardware both for primary and backup D-channels. D-channel lines must be conditioned for 64K before D-channels can be brought up.

Note: To conﬁgure J1, the asynchronous port on the DCHI card, refer to the documentation of the application being interfaced, and to Circuit Card Reference (NN43001-311). J1 conﬁguration is not described in this technical document.

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Set up the NT6D11AB, NT6D11AE, NT6D11AF DCHI

DIP switch settings

The NT6D11AB/AE/AF has three sets of DIP switches. Each port has its own bank of 10 DIP switches (SW1 & SW2) to select the port address (8 bits) and mode of operation (2 bits). SW1 is used for port 0 settings, SW2 is used for port 1 settings. SW3 is used to select the D-channel protocol. Port 0 is used to select whether the asynchronous ESDI port is be disabled or not. Port 1 is used to select the standard or expanded D-channel addressing mode on the NT6D11AB/AE/AF.

The DIP switches are located as shown by Figure 35 "NT6D11 DIP

switches" (page 80).

Figure 35 NT6D11 DIP switches

Protocol selection

SW3 is used to select the D-channel protocol, as shown by Table 21

"Protocol selection switch settings" (page 81).

Note: The setting must be 1 for ISDN applications.

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Set up the NT6D11AB, NT6D11AE, NT6D11AF DCHI 81

Table 21 Protocol selection switch settings

Protocol

DPNSS1 ISDN

Valid switch combinations

The following are the only allowable switch setting combinations (not including address switch settings).

Port 0

Port 0 can be conﬁgured as asynchronous ESDI, or disabled. If the port is conﬁgured as disabled, it will not be visible to the system CPU. Refer to

Table 22 "Port 0 settings" (page 81).

Table 22 Port 0 settings

Mode

Asynchronous ESDI Asynchronous ESDI Port disabled

Switch Setting

SW3.1 SW3.2 00 11

Switch setting

SW1.1 SW1.2 SW3.1 SW3.2 1000 1011 11

Port 1

The following are the only valid emulation mode combinations. If the port is conﬁgured as disabled, it will not be visible to the system CPU. Refer to

Table 23 "Port 1 settings" (page 81).

Note: The ISDN emulation must be selected.

Table 23 Port 1 settings

Mode Emulates

DPNSS1 NT5K35 ISDN NT6D11 Expanded

DPNSS1 Port disabled

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SW2.1 SW2.2 SW3.1 SW3.2 0000 0011

NT5K75

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0100

Switch setting

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82 DCH installation

Jumper settings

The NT6D11AB/AE/AF has two banks of option straps, one for each port. These select between DCE and DTE operation and whether the signalling interface is RS232 or RS422. Refer to Figure 36 "NT6D11 DCH with

ISL high-speed programming jumper settings" (page 82) and Figure 37 "NT6D11 DCH with ISL low-speed programming jumper settings" (page 83).

Figure 36 NT6D11 DCH with ISL high-speed programming jumper settings

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Set up the NT6D11AB, NT6D11AE, NT6D11AF DCHI 83

Figure 37 NT6D11 DCH with ISL low-speed programming jumper settings

Port addressing modes

Port 0 Mode selection

Port 0 is used to select whether the asynchronous ESDI port is be disabled or not. Refer to Table 24 "Port 0 mode selection" (page 83).

Note: The asynchronous ESDI port must be set to "disabled".

Table 24 Port 0 mode selection

Port Mode

Not used Asynchronous ESDI Port disabled

Port 1 mode selection

Port 1 is used to select the standard or expanded D-channel addressing mode on the NT6D11AB/AE/AF. Refer to Table 25 "Port 1 mode selection"

(page 84).

Switch Setting

SW1.1 SW1.2 0 10 11

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Table 25 Port 1 mode selection

Port Mode

Synchronous, D-channel, standard addressing

Note: THIS SELECTION MUST BE MADE FOR ISDN.

Synchronous, D-channel, expanded addressing Not used Port disabled

Port address switch settings

Port address switch settings in the standard mode, for ISDN

Table 26 "Port address switch settings for ISDN" (page 84) depicts the port

address switch settings that apply to SW1 or SW2, the D-channel port, for ISDN mode.

Table 26 Port address switch settings for ISDN

Port Address

Switch Setting

SW2.1 SW2.2 00

01 10 11

Switch Setting

Half Group No.

Device No.

S3 S4 S5 S6 S7 S8 S9 S10

0 0000000 1 0000001 2 0000010 3 0000011 4 0000100 5

0000101 6 0000110 7

0000111 8 0001000 9 0001001

10 0001010 11 0001011 12 0001100 13 0001101

x x x x x x x x x x x x x x

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Port Address

Half Group No.

S3 S4 S5 S6 S7 S8 S9 S10

14 0001110 15 0 0 1

16-31 0 0 1 32-47 0 1 0 48-63 0 1 1 64-79 1 0 0 80-95 1 0 1

96-111 1 1 0

112-127 1 1 1

Switch Setting

Device No.

Install the NT6D11AB, NT6D11AE, NT6D11AF DCHI

Follow Procedure 1 "Install the NT6D11AB, NT6D11AE, NT6D11AF DCH"

(page 85) to install the NT6D11 DCH on the Large System.

Procedure 1 Install the NT6D11AB, NT6D11AE, NT6D11AF DCH

Step Action 1

Determine the cabinet and shelf location for the circuit pack being installed.

The NT6D11AB, NT6D11AE, or NT6D11AF DCHI card can be installed in any slot appropriate for an I/O port card on a Network shelf. (The NT6D11 DCHI card can be located on the Common Equipment shelf only on single-CPU switches.)

2 3

Unpack and inspect the card. Set the option switches on the DCHI card. For PRA capability, set

port J2 to odd. For ISL capability, set port J2 for high speed or low speed operation (See Figure 36 "NT6D11 DCH with ISL high-speed

programming jumper settings" (page 82), Figure 37 "NT6D11 DCH with ISL low-speed programming jumper settings" (page 83), and Table 26 "Port address switch settings for ISDN" (page 84) starting

on Figure 36 "NT6D11 DCH with ISL high-speed programming

jumper settings" (page 82)).

Set faceplate toggle switch to DISABLE.

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5 6

Install the DCHI card into the assigned shelf and slot. Connect DCHI port J2 to the NT8D72AB or NT8D72BA PRI port J5

with a QCAD328A cable.

7 8

Set faceplate toggle switch to ENABLE. Coordinate the start-up and veriﬁcation of the DCHI with the start-up

of the PRI.

9 Enable the DCHI card using LD 96, command ENL DCHI N.

—End—

Remove the NT6D11AB, NT6D11AE, NT6D11AF DCH

Use Procedure 2 "Remove the NT6D11AB, NT6D11AE, NT6D11AF DCH"

(page 86) to remove the NT6D11AB, NT6D11AE, NT6D11AF DCH from

a Large System.

CAUTION

The NT6D11AB, NT6D11AE, NT6D11AF DCH must be software disabled before it is hardware disabled, or initialization will occur.

Procedure 2 Remove the NT6D11AB, NT6D11AE, NT6D11AF DCH

Step Action 1

Disable the NT6D11AB, NT6D11AE, NT6D11AF DCHI using LD 96, command DIS DCHI N.

If asynchronous port J1 is enabled, it must also be software disabled, using LD 37, or initialization will occur.

If the circuit pack is being completely removed, not replaced, remove data from memory.

4 5 6

Determine the cabinet and shelf location of the card to be removed. Set faceplate toggle switch to DISABLE. Disconnect NT6D11AB, NT6D11AE, NT6D11AF DCHI cables.

7 Remove NT6D11AB, NT6D11AE, NT6D11AF DCHI card. 8

Pack and store the card.

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Install the QPC757 DCH

Installation procedures for the QPC757 DCHI card are the same for all Large Systems. These procedures apply to both primary and backup D-channels. See Figure 38 "QPC757 option and PRI/ISL high-speed programming

switch settings" (page 88) on page 115, Figure 39 "QPC757 option and PRI/ISL low-speed programming switch settings" (page 89) and Table 27 "D-channel port address switch settings for PRI" (page 89), for option switch

settings per port number of the DCHI card, in Primary Rate Interface mode. Use Procedure 3 "Install the QPC757 DCHI" (page 87) to install the

QPC757 DCHI card on Large Systems.

Procedure 3 Install the QPC757 DCHI

Step Action

Install the QPC757 DCH 87

—End—

Determine the cabinet and shelf location of the circuit card to be installed.

The QPC757 DCHI card can be installed in any slot appropriate for an I/O port card on a network shelf. For single CPU systems only, the QPC757 DCHI card can be located on the Common Equipment (CE) shelf.

2 3

Unpack and inspect the card. Set option switches and jumper plugs on the DCHI card. For PRI

capability, set port J2 to odd. For ISL capability, set port J2 for high-speed or low-speed programming.

4 5 6

Set faceplate toggle switch to DISABLE. Install DCHI card into the assigned shelf or module and slot. Run and connect DCHI cables: connect QPC757 J2 to QPC720

PRI J5 with a QCAD328A cable.

7 8 9

Set faceplate toggle switch to ENABLE. Enable the loop in LD 60. Coordinate start-up and veriﬁcation of the DCHI with the start-up

of the PRI.

Enable the DCHI card using LD 96, command ENL DCH x.

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—End—

Figure 38 QPC757 option and PRI/ISL high-speed programming switch settings

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Figure 39 QPC757 option and PRI/ISL low-speed programming switch settings

Install the QPC757 DCH 89

Port address switch settings

Table 27 "D-channel port address switch settings for PRI" (page 89) shows

the port address switch settings that apply to SW1, SW2 (the D-channel port), SW3, and SW4.

Table 27 D-channel port address switch settings for PRI

Port Number

J1 J2 SW1 SW2 SW3 SW4

01 22 4 6

5 7

10 11 12 13 14 15

Off Off Off Off Off Off On Off Off On Off Off Off On On Off On Off Off Off On Off On Off On On Off Off On On On Off

Port Address Switch Settings

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D-channel parameter downloading

The system software automatically downloads new parameters to each D-channel Interface (DCHI) circuit card upon SYSLOAD. When this occurs, the D-channel is temporarily disabled and then automatically reenabled.

Three situations require manual disabling and enabling of each DCHI to ensure parameter downloading:

•

Remove the QPC757 DCHI

Use Procedure 4 "Remove the QPC757 DCH" (page 90) to remove the QPC757 DCHI card from Large Systems.

Performing a parallel load and switching over to the second CPU Following an alarm condition for the T1 loop carrying the D-channel (but

the D-channel is still operational) Following SYSLOAD when using ISDN Signaling Link (ISL)

CAUTION

The QPC757 DCH must be software disabled before it is hardware disabled to prevent initialization

Procedure 4 Remove the QPC757 DCH

Step Action 1

Disable the QPC757 DCHI using LD 96, command DIS DCH x. Disable asynchronous port J1 in LD 48 to prevent initialization.

3 Disable loop in LD 60. 4

If the circuit card is being removed, not replaced, remove data from memory.

5 Determine the cabinet and shelf location of the card to be removed. 6 7 8 9

Set faceplate toggle switch to DISABLE. Disconnect QPC757 DCHI cables. Remove QPC757 DCHI card. Pack and store circuit card.

—End—

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NTBK51 DDCH installation and removal

This section contains information on the following topics:

"Introduction" (page 91) "Install NTBK51 DDCH on NT5D97 dual-port DTI2/PRI2 card" (page 91) "Remove NTBK51 DDCH from NT5D12 dual-port DTI/PRI" (page 94)

Introduction

This chapter provides installation and removal procedures for the NTBK51 Downloadable D-channel Daughterboard, the NT5D97 dual-port DTI2/PRI2 card, and the NT5D12 dual-port 1.5 Mb DTI/PRI card on all Large Systems.

Note: The only version of the NTBK51 DDCH that can be used on an NT5D97, or NT5D12 installed on a Large System, is the NTBK51AA. Vintage NTBK51BA cannot be used, due to a different pin conﬁguration (the NTBK51BA is used on Small Systems.)

Before beginning an installation:

•

Consult the Spares Planning (NN3001-253) document and follow the instructions.

•

Bring spares of all cables and boards.

•

Remember that test procedures require a 24-hour minimum bit error-rate testing before being used.

•

Remember that either the DDCH, the MSDL, or NT5D97, or NT5D12 card can be installed ﬁrst. However, NT5D97 PRI2 loops, and NT5D12 PRI loops, must be conﬁgured in software before deﬁning DCH links.

Install NTBK51 DDCH on NT5D97 dual-port DTI2/PRI2 card

Installation procedures for the NTBK51 DDCH are the same for all Large Systems. Use Procedure 5 "Install the NTBK51 on the NT5D97 dual-port

DTI2/PRI2 card" (page 92) below.

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The DDCH can be mounted on any NT5D97 DDP2 card. Set the address for the DDCH (see the switch settings section to set the address). If a DDCH is present on a DDP2 card then an external D-channel should not be connected to J6. If a DDCH is present the LED "DDCH" lights up.

CAUTION

The static discharge bracelet located inside the cabinet must be worn before handling circuit cards. Failure to wear the bracelet can result in damage to the circuit cards.

Procedure 5 Install the NTBK51 on the NT5D97 dual-port DTI2/PRI2 card

Step Action 1

Unpack and inspect the DDCH daughterboard. The DDCH comes with four standoffs so that it can be mounted

onto the NT5D97. These are easily pushed into four corresponding mounting holes on the DDP2.

Mount the DDCH so that it mates with P1 and P2 on the NT5D97 motherboard.

Note: P 1 and P 2 contain (40+30) sockets as the NTBK51AA respective pins (40+30), which enables the technician to "mate" them. This is applicable for the NT5D97AA/AB. The NT5D97AD has 44+34 sockets. In order to place the NTBK51AA (40+30 pins), place the NTBK51AA inside P1 and P2. Start from their lower edge. (The remaining "free" sockets (4+4) in P1 and P2 are in their upper edge.)

3 Set the DDP2 ENB/DIS faceplate switch to Enable (ON). The DDCH

LED then ﬂashes three times.

—End—

Remove NTBK51 DDCH from NT5D97 dual-port DTI2/PRI2 card

Removal procedures for the NTBK51 DDCH are the same for all Large Systems.

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CAUTION

A static discharge bracelet must be worn before handling circuit cards. Failure to wear the bracelet can result in damage to the circuit cards.

The NTBK51 can only be removed when it is disabled in software. Both ports of the associated DDP2 card must be disabled. Follow the steps in

Procedure 6 "Remove the NTBK51 from the NT5D97 dual-port DTI2/PRI2 card" (page 93) to remove the NTBK51 from the NT5D97 dual-port

DTI2/PRI2 card.

Procedure 6 Remove the NTBK51 from the NT5D97 dual-port DTI2/PRI2 card

Step Action 1 Set the DDP2 ENB/DIS faceplate switch to Disable (OFF).

Remove the DDP2 and the DDCH.

—End—

Install NTBK51 DDCH on NT5D12 dual-port DTI/PRI

Installation procedures for the NTBK51 DDCH are the same for all Large Systems.

Set the address for the DDCH (see the switch settings section to set the address). If a DDCH is present on a DDP card then an external D-channel should not be connected to J6. If a DDCH is present, the LED "DCH" lights up.

CAUTION

Service Interruption

A static discharge bracelet must be worn before handling circuit cards. Failure to wear the bracelet can result in damage to the circuit cards.

The DDCH can be mounted on any DDP card. Follow the steps in

Procedure 7 "Install the NTBK51 DDCH on the NT5D12 dual-port DTI/PRI" (page 94) to install the NTBK51 on the NT5D12 dual-port DTI/PRI card.

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Procedure 7 Install the NTBK51 DDCH on the NT5D12 dual-port DTI/PRI

Step Action 1

Unpack and inspect the DDCH daughterboard. The DDCH comes with four standoffs so that it can be mounted onto

the DDP. These are easily pushed into four corresponding mounting holes on the DDP.

Mount the NTBK51 DDCH so that it mates correctly with P1 and P2 on the NT5D12 DDP motherboard.

—End—

Remove NTBK51 DDCH from NT5D12 dual-port DTI/PRI

Removal procedures for the NTBK51 DDCH are the same for all Large Systems.

CAUTION

A static discharge bracelet must be worn before handling circuit cards. Failure to wear the bracelet can result in damage to the circuit cards.

The DDCH can only be removed when it is disabled in software. Both ports of the associated DDP card must be disabled. Follow the steps in Procedure

8 "Remove the NTBK51 from the NT5D12 dual-port DTI/PRI card" (page

94) to remove the NTBK51 from the NT5D12 dual-port DTI/PRI card.

Procedure 8 Remove the NTBK51 from the NT5D12 dual-port DTI/PRI card

Step Action 1 Disable the faceplate switch on the DDP.

Remove the DDP and DDCH.

ISDN Primary Rate Interface Installation and Commissioning

—End—

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Page 95

MSDL installation for all systems

The section contains information on the following topics:

"Install the MSDL" (page 95) "Replace the MSDL" (page 98)

Install the MSDL

Installation procedures for the MSDL card are the same for Large Systems. Use Procedure 9 "Install the MSDL card" (page 95) below. See Figure 40

"MSDL card layout" (page 97), and Table 28 "MSDL switch settings" (page

97) for the port and interface switch settings.

The MSDL card goes into the following slots:

Half Group, Single Group

Multi Group Network Module slot 5–14

Refer to Software Input Output Reference — System Messages (NN43001-712) and Circuit Card Reference (NN43001-311) for more information.

Procedure 9 Install the MSDL card

Step Action 1

Determine module and slot location for the MSDL card. Unpack and inspect the MSDL card.

Set the MSDL switch settings to correspond to Table 28 "MSDL

switch settings" (page 97), and Figure 40 "MSDL card layout" (page

97).

ISDN Primary Rate Interface Installation and Commissioning

CPU/Network Module slot 1–8, 13

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Page 96

96 MSDL installation for all systems

Insert the MSDL card into the selected card slot of the module following the card guides.

Observe the red LED on the MSDL faceplate. If it turns on, ﬂashes three times, and stays on continuously, the MSDL is operating correctly but is not yet enabled.

If the LED turns on and stays on continuously without ﬂashing three times, the card can be defective. Go to step 8.

Connect the appropriate cable between the NT6D80 and the PRI card MSDL interface.

6 7

Enable the MSDL card in LD96. Unplug the MSDL card and reinsert it. If the red LED still does

not ﬂash three times, leave the card installed for approximately 10 minutes to allow the card to be initialized.

After 10 minutes unplug the card, reinsert it and if the card still does not ﬂash three times, the card is defective and must be replaced.

—End—

ISDN Primary Rate Interface Installation and Commissioning

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Page 97

Figure 40 MSDL card layout

Install the MSDL 97

Table 28 MSDL switch settings

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RS-232-D

RS-422-A DTE

RS-422-A DCE

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ononononononononoffoffoffoffoffoffoffoffoffo

offoffoffoffoffoffoffoffoffoffoffoffoffoffoffoffoffo

RS-232-D

RS-422-A DTE

offoffoffoffoffoffoffoffononononononononono

ISDN Primary Rate Interface Installation and Commissioning

Port 0—SW4 Port 0—SW8

Port 1—SW3 Port 1—SW7

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

onono

Page 98

98 MSDL installation for all systems

RS-422-A DCE

RS-232-D

RS-422-A DTE

RS-422-A DCE

RS-232-D

RS-422-A DTE RS-422-A DCE

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offoffoffoffoffoffoffoffoffoffoffoffoffoffoffoffoffo

offoffoffoffoffoffoffoffononononononononono

ononononononononoffoffoffoffoffoffoffoffoffo

offoffo

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Replace the MSDL

Replacement procedures for the MSDL card are the same for all Large Systems. Use Procedure 10 "Replace the MSDL card" (page 98) below.

Port 2—SW2 Port 2—SW6

Port 3—SW1 Port 3—SW5

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Procedure 10 Replace the MSDL card

Step Action 1

2 3

Disable the MSDL card in LD 96. Disconnect MSDL to PRI cables. Remove the faulty MSDL card.

4 Unpack and inspect the new MSDL card. 5

Set the MSDL switch settings to correspond to Table 28 "MSDL

switch settings" (page 97) and Figure 40 "MSDL card layout" (page

97).

Insert the new MSDL card into the selected card slot of the module following the card guides.

Observe the red LED on the MSDL faceplate. If it turns on, ﬂashes three times, and stays on continuously, the MSDL is operating correctly but is not yet enabled.

If the LED turns on and stays on continuously without ﬂashing three times, the card can be defective. Go to step 11.

ISDN Primary Rate Interface Installation and Commissioning

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Page 99

Replace the MSDL 99

9 10

Connect the appropriate cable between the NT6D80 and the PRI card MSDL interface.

Enable the MSDL card in LD 96. Unplug the MSDL card and reinsert it. If the red LED still does

not ﬂash three times, leave the card installed for approximately 10 minutes to allow the card to be initialized.

After 10 minutes unplug the card and reinsert it. If the red LED does not ﬂash three times, the card is defective and must be replaced.

—End—

ISDN Primary Rate Interface Installation and Commissioning

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Page 100

100 MSDL installation for all systems

ISDN Primary Rate Interface Installation and Commissioning

Nortel Communication Server 1000

NN43001-301 02.03 Standard

Release 5.5 7 December 2007