Nortel ICS, Modular ICS 7.1 Install Manual

Norstar and Meridian are trademarks of Nortel Networks
© Copyright Nortel Networks 2007

Modular ICS 7.1
Installer Guide

1-800-4 NORTEL

www.nortel.com/norstar

N0130943 02

Printed in Canada

N0130943 02 Modular ICS 7.1 Installer Guide

Table of Contents

Regulations 21

North American Regulatory Information 21

Safety 21

Enhanced 911 Configuration 22

Telecommunication Registration 24

Network Connection 25

Canada and US 25
Hearing Aid Compatibility 25
Electromagnetic Compatibility 25
Telephone Company Registration 26
Use of a Music Source 26
Rights of the Telecommunications Company 26
Repairs 27

Canadian Regulations - please read carefully 28

Notice 28
Notice 29

US Regulations - please read carefully 30

Federal Communications Commission (FCC) Notice 30
Ringer Equivalence Number 31
Hearing Aids 32
Programming Emergency Numbers 32
EMI/EMC (FCC Part 15) 32

Important Safety Instructions 34

Installation 34
Use 35

International Regulatory Information 37
Safety 39

Additional Safety Information 40

Limited Warranty 42

Exclusions 42
Warranty Repair Services 43
After Warranty Service 43

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Modular ICS 7.1 Installer Guide N0130943 02

How to use this document 45

What’s new with Norstar 47

New feature for Version 7.1 47
New features and hardware for version 7.0 47
Changes for version 7.0 49
Features from 6.1MR addendum 51

Welcome to ISDN 53

Comparing ISDN to Analog 54
Type of ISDN service 54

B channels 55

D channels 55
ISDN layers 55
ISDN bearer capability 56
Services and features for ISDN PRI and BRI 57

PRI services and features 57

BRI services and features 58
Feature descriptions 59

Network name display 59

Message Waiting Indicator (MWI) 60

Name and number blocking 60

External call forwarding 61

MCDN trunk features 61

Call by Call service selection for PRI 61

Emergency 911 dialing 62

MCID (Profile 2) 63

Network Call Diversion (Profile 2) 63

DTI card configured as a PRI card 64
ISDN hardware 64

DTI card configured as PRI 64

BRI Card 65

BRI-U2 and BRI-U4 card 65

BRI-ST card 65

U-LT reference point 66

U-NT reference points 66

S reference point 67

T reference points 68
Clock source for ISDN cards 69
Other ISDN BRI equipment: NT1 70

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N0130943 02 Modular ICS 7.1 Installer Guide

ISDN standards compatibility 71

Working with ISDN 73

Planning your ISDN network 73
Ordering ISDN PRI 73

Ordering ISDN PRI service in Canada 73
Ordering ISDN PRI service in United States 74

Ordering ISDN BRI 74

Ordering service in Canada 74

Ordering ISDN service in the U.S. 74
Supported ISDN protocols 76
ISDN programming 76

Programming ISDN PRI resources 77

Programming ISDN BRI resources 78

Programming ISDN PRI lines 81

Programming ISDN BRI lines 81

Programming Direct Inward System Access (DISA) on PRI

trunks 82
Programming ISDN equipment 83

Terminal equipment for BRI cards 83

Devices on an S or LT loop (BRI cards only) 83

ISDN router 86

D-packet service (BRI cards only) 86

POSTA for ISDN BRI 87

Point-of-sale terminal adapter 88

Trunks and target lines 89

Trunk operating modes (T1) 90

Ground start trunks (T1 only) 90

DID trunks 91

Analog loop start trunks 93

Analog E&M trunks 95
BRI trunks 97
PRI trunks 97
Target lines 98

Remote system access 99

Use system features during a remote call 99

Remote access on loop start and E&M trunks 100

Remote access on a private network 100

Remote access on Direct Inward Dial (DID) trunks 101

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Modular ICS 7.1 Installer Guide N0130943 02

Remote access on PRI trunks 101

Controlling system access 103

Class of Service 103
Restriction filters 104

Direct inward system access (DISA) 106

Networking with Norstar 109

Tie-line networking 110

Norstar behind a PBX 111

Dialing plans 112
Dialing plan using public lines 114

Destination code numbering in a network 114
Dialing plan using E&M lines 115
Dialing plans with shared line pools 119

Call-by-Call Services Example 121

Norstar Configuration 123

PRI dialing plan example for two-way DID 125

Static DID and two-way DID 126

Private networking using PRI SL-1 127

SL-1 networking features 127

Features specific to Advanced Private Network 128

Private Network Tandem calling 129

Calls originating from the public network 130
Calls originating in the private network 133
Routing for tandem networks 136

Advanced Private Networking 138

Networking using routing codes 138

MCDN Private Networking 144

Using a UDP dialing plan 145
Using a CDP dialing plan 148

MCDN trunk call features 151

Network Call Redirection Information 152
ISDN Call Connection Limitation 154
Trunk Route Optimization 156
Trunk Anti-tromboning 158

MCDN voice mail/auto attendant call features 160

MCDN Meridian 1 attendant MCDN features 160
Message Waiting Indication 161
Camp-on 162
Break-in 164

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Central voice mail and Auto Attendant with Norstar 166
Configuring centralized voice mail 167

Local system 167

Remote system 168
Using centralized voice mail 170
Configuring Centralized Auto Attendant (CAA) 170

Assigning PNIs 171

Assigning PNIs for adjacent nodes 171

Local system 172

Remote system 173
Voice mail configuration 175

Customer Use 176

Public network 176

Call one or more Norstar telephones 176

Call Norstar and select tie lines to a private network 177

Call Norstar and select lines to the public network 179
Private network 180

Call one or more Norstar telephones 180

Use tie lines to other nodes in the private network 181

Select lines to the public network 182

Select E&M trunks to the private network 183

Norstar Line Redirection feature 184

ETSI, MCDN and Network features 186

Network Call Diversion 186
Allowing NCD 187

Feature description 187

Programming and restrictions 188
Selective Line Redirection 189

Programming Extensions 189

Enhanced Caller ID 189
Malicious caller identification (MCID) 190
Programming MCID capability 191

Data Solutions 193

Examples of ISDN Scenarios 193
ISDN applications 193

Planning the installation 195

Planning checklist 196

Hardware 196

Initial configuration 196

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Modular ICS 7.1 Installer Guide N0130943 02

System configuration 197
Required equipment 197
Expansion equipment 198
Optional equipment 199
Equipment for installing the ICS and modules 200
Location requirements 200
Electrical requirements 202
Configuring Trunk Cartridges 203
Configuring Station Modules 203
Internal wiring requirements 204

Norstar loop 204

ISDN S reference point (S Loop) 204
System overview 206
Upgrading your Norstar system 207

Supported upgrades in MICS 7.1 208

Upgrade systems previous to MICS 6.1 to 7.1 using the up-

grade tool 210

Using the upgrade tool to upgrade to version 4.1 212

Using the upgrade tool to upgrade to version 6.1 213

Upgrade from version 6.1 or 6.1MR to version 7.1 214
Upgrading from MICS 7.1 to MICS-XC 7.1 215
Trunk and Station Modules 218

Global Analog Trunk Cartridge/CLI Cartridge 218

Off-core DTI card 219
Replacing a Modular 8x24 KSU 220
Trunk module line numbering 224

Upgrading ILG functionality with hunt groups 225

Planning Hospitality functions 226

Installation 227

Installation checklist 228
Testing the ISDN BRI network connection 230

Installing the cartridges 231
Mounting the modules 233

Installation tips 235

Installing the ROM Software Cartridge 237
Inserting a cartridge 239

Terminating resistors on BRI-ST Cards 240

Shorting straps on a BRI-ST card 241
Connecting expansion modules 242

Order of connection 242

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Analog Station Module 242
Installing fiber cables 248
Fiber cable management system 249

Using the fiber cable management system 250
Using the fiber spool 252
Making fiber connections 253
Routing fiber cables 254

Connecting the wiring 255

Connecting the wiring to the distribution panel 255
Wiring charts 260

Port numbering on the wiring charts 260

Integrated Communications System (ICS) 260

BRI Wiring charts 269

Wiring the BRI network interface 276

DTI wiring 278

E&M/DISA Trunk Cartridge wiring chart 282

DID supervisory signaling 285

Emergency transfer conditions 285
Emergency telephone 291
Moving telephones 293
Installing ISDN BRI terminal equipment 294

S or T wiring for terminal equipment 294

S or T extension wiring configurations 295
Additional power 295
U-LT wiring for terminal equipment 296

Installing optional equipment 297

Auxiliary ringer (customer supplied) 297

Auxiliary ringer programming 297

External music source (customer supplied) 298

External music source programming 298

External paging system (customer supplied) 299

Powering up the system 300

Check the power 301

Programming 303

Programming overview 304

Profile, Dialpad and Startup programming 305
Installer or System Coordinator Plus programming 306
System Coordinator programming 307
Admin/Basic programming 307

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Modular ICS 7.1 Installer Guide N0130943 02

Programming tools 309

The programming overlay 309
Using the telephone buttons for programming 310

Special characters on the display 312

The display buttons 312
The Norstar Programming Record 313
Exiting 313
Viewing your programming updates 314
Entering numbers 314
Viewing long telephone numbers 314
Setting up User Preferences 315

Copying telephone programming 316

System ID 319
Reviewing programmed settings 319

Viewing the programming for a telephone 320

Viewing the programming for a line 320

Programming sequence 321
Profiles and Dialpads 322

Profile programming 322

Profile parameters 322

Changing the profile 325
Dialpad programming 326

Startup programming 327

Performing Startup 327

Changing the default telephony template 328

Changing the starting DN 329

Programming 331

Entering programming for installers 332
Entering programming for system coordinators 333
Entering programming using other passwords 334

Terminals&Sets 335

Line access 335

Line assignment 336

Appearances 337

Line pool access 339

Prime line 340

Intercom keys 341

Answer DNs 342

OLI # 343
Capabilities 345
Name 348

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User prefernces 348
Restrictions 349

Filters 349
Default filters 351
Set restrns 354
Filters 354
Set lock 355
Allow last no 355
Allow saved no 355
Allow link 355
Line/set restrns 356

Telco features 357

Feature assignment (CLID alignment) 357
Caller ID set 357
Call log set 358
Extl VMsg set 358
1stDisplay 359
Called ID 359
Log space 360

Lines 361
Trunk/Line data 361

Copying Trunk and Line data 363
Trunk type 363
Line type 364
Line connected to a DTI 365
Dial mode 366
Rec’d # 367
If busy 367
Prime set 368
Auto privacy 368
Trunk mode 369
Ans mode 369
Ans with DISA 370
Link at CO (loop trunks only) 371
Aux. ringer 371
Full AutoHold 372
LossPkg 372
Signal 373
ANI Number 374
DNIS Number 374
Gain 375
Programming distinctive ring patterns 376

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Modular ICS 7.1 Installer Guide N0130943 02

Name 377
Restrictions 378

Restrn filters 378

Line restrns 378

Remote restrns 379
Telco features 380

VMsg center 1 380

Services 381

Common settings 382

Control sets 382

Schedule names 383

Schedule times 383
Ringing service 385

Ringing groups 385

Sched:Night 386

Service 386

Trunk answer 386

ExtraDial telephone 387

Line settings 387
Restrn service 389
Routing service 389

Routes and destination codes 391

Routes 391

DialOut 392

Use Pool 392

Routing table 393

Programming the PRI routing table 394
Dest codes 395

Wild card character 396

Normal rte 398

Digit Absorption 398

Setting up a route for local calling 399
Setting up a route for long distance calling 401
Configuring the second dial tone table 403
Adding a long distance carrier access code 404
Programming for least cost routing 406

Multiple least cost routing 407

Sched:Night 408

Using dialing restrictions with routing 410
Sys speed dial 411
Passwords 412

COS pswds 412

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N0130943 02 Modular ICS 7.1 Installer Guide

Pswd 413
User flt 413
Line flt 413

Remote pkg 414
Call log pswds 414
Progrming pswds 415

Installer 415

SysCoord+ 416

SysCoord 416

Basic 416
Hospitality password 416

Desk pswd 417

Cond pswd 417
Silent Monitor password 418

Time&Date 419
System prgrming 420

Hunt groups 420

Adding or removing members from a group 421

Moving members of a group 423

Assigning or unassigning lines to a group 423

Setting the distribution mode 424

Setting the hunt delay 425

Programming busy line setting 425

Programming the queue timeout 426

Programming the overflow set 426

Setting the Hunt group name 427

Allowing/disallowing an auxiliary ringer 427

Assigning a distinctive ring pattern to a Hunt Group 428

Monitoring Hunt groups 429
Change DNs 430
Featr settings 430

Backgrnd music 430

On hold 431

Receiver volume 431

Camp timeout 431

Park timeout 432

Park mode 432

Trnsfr callbk 432

DRT to prime 433

DRT delay 433

Held reminder 433

Remind delay 434

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Modular ICS 7.1 Installer Guide N0130943 02

Directed pickup 434
Page tone 435
Page Timeout 435
Automatic Daylight Savings time 435
AutoTime&Date 436
Call log 437
Call log space 437
Host delay 438
Link time 439
AlarmSet 439
Set relocation 440
Msg reply enh 441
Answer key 441
Setting SWCA controls 442
CLID match 447
Silent Monitor 447

Direct-dial 448

D-Dial1 448
Intrnl/Extrnl# 449

Line selection 449
CAP/KIM assign 450
Dialing Plan 451

DN lengths (enbloc dialing) 452

Private networks 453

Public networks 454

Dial Timeout 455
Access codes 456

Line pool codes 456
Park prefix 458
External code 459
Direct-dial # 459
Auto DN 460
DISA DN 460
PrivAccCode 461
Carrier Codes 462
Remote access 463

Rem access pkgs 463

Rem line access 463
Rec’d # length 465
DN length 465
Nat’nl length (profile 2, only) 467
Make/Break (profile 2, only) 467

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N0130943 02 Modular ICS 7.1 Installer Guide

BusName 467

Receiving and Sending Calling Party Name 468
Receiving and Sending Connected Name 469
Network Name Display interactions 469
Programming Network Name Display 470

Outgoing Name and Number Blocking 471

Call by Call service for PRI 472

Line Pools 475

Programming Call by Call service selection 475

PRI Call by Call Limits 475

Programming Call by Call Limits 476
Release Reasons 477
Programming Hospitality Services 478

Room/desk information 478

Call restrns 479

Setting Service times 480

Configuring alarms and expired alarms settings 480
SM sets 481

Network Services 482

ETSI: Network diversion and MCID 482

Network Call Diversion 483

Malicious call identification (MCID) 486
MCDN services (profiles 1, 2, 4) 487

Telco features 488

VMsg ctr tel#s 488
Outgoing Name and Number Blocking 489

Programming the analog vertical service code (VSC) 490

Programming the BRI VSC 490

Setting up the modules for ONN blocking 491

Program ONN blocking BRI loop state 492

Software keys 493

ISDN-PRI 493
MCDN 493

System Identification Number 494

Call the Nortel Customer Response Center 494

Entering the software keys 495

Hardware 496
Show module 496

Cards on KSU 496

Provisioning the DTI card for PRI 497

Selecting a protocol 498

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Modular ICS 7.1 Installer Guide N0130943 02

BchanSeq 499
Call-by-call routing 499
Discon timer 501
Answer timer 501
CO fail 502
I/F levels 502
Framing 503
Internal CSU 504
CSU line bld 504
Line coding 505
ClockSrc 506
Max transits 506

Modules 506

StnMod 506
ASM 507
TrunkMod 508

BRI card 512

Loop 512
Type 512
Lines 512
No SPIDs assignd 513
# of B-channels 513
Network DNs 514
Call type 514
D-packet servce 515
Lp 515
TEIs 516
No TEIs on loop 516
Sampling 516

DNs on Loop 517

Assign DNs 517
Loop DN 517

Clock Src 518

Setting the clock source for DTIs and PRI 522

T1 or ISDN-PRI configurations 524
Send Name Display (PRI) 525
DataMod 526

Type 526

Maintenance 527

Beginning a Maintenance session 528

System version 529

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N0130943 02 Modular ICS 7.1 Installer Guide

Checking the version of the system 529

Port/DN status 530
Identifying a connected device 531

Displays 532
Checking the device version number 533
Checking the state of the device 534
Disabling a device 535

Displays 535
Enabling the device 536
Returning to the beginning 536

Module status 537
Looking at the module inventory 537

Checking the number of Cartridges 538
Checking the state of a module 538
Checking the state of a cartridge 539
Disabling a module or its cartridges

539
Enabling a module or its cartridge 540
Returning to the beginning 540

System test log 541
Checking the items in the log 541

Checking the current alarm 542
Checking when each item occurred 542
Checking consecutive repetitions of an event or alarm 542
Erasing the log 543

System administration log 544

Checking the items in the log 544

Checking the current alarm 545
Checking when each item in the log occurred 545
Erasing the log 545

Network evt log 546
Checking the items in the log 546

Checking the current alarm 546
Erasing the log 547
Checking when each item in the log occurred 547

Alarm codes 548

If you see an alarm code 549
Alarm troubleshooting 551

Event messages 555

Dealing with event messages 555

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Modular ICS 7.1 Installer Guide N0130943 02

Significant event messages 556
Event message 799 559
Displays 560

Provisioning BRI and PRI lines 563
BRI and T1 lines 563

Cd1-ICS 563
L001 564

Provisioning a T1 line 564
Provisioning a PRI line 564
Deprovisioning a line 565
Disabling a PRI Channel 565

Tests 566

Loopback tests for T1 or ISDN-PRI lines 566

Tests initiated from Norstar 570

Tests initiated by the central office 570
Starting a loopback tests 571
Operating a Continuity loopback test 572
Loopback test for BRI lines 572
Operating a payload loopback test 573

CSU stats 574
Statistics 574

Checking the performance statistics 575
Checking the CSU alarms 577

Checking active alarms 577

Checking carrier failure alarms 577

Checking bipolar violations 578

Checking short term alarms 578

Checking defects 578

Resetting all statistics 579
Diagnostic tools 580
Link Status 581

Working with fractional PRI 581

Usage Metrics 583

Hunt groups 583

Call-by-Call 584

Clearing the metrics 585

Troubleshooting 587

Getting ready 588

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N0130943 02 Modular ICS 7.1 Installer Guide

Types of problems 589

Misunderstanding a feature 589
Programming errors 589
Wiring connections 589
Equipment defects 589

General troubleshooting procedure 590

Problems with telephones 591

Set has faulty buttons, display, handset or other hardware

problems 591
Unreadable set display 591
Telephone dead 592

Running a Maintenance session to test a dead telephone
593
Replacing a telephone 593
Emergency telephone dead 594

Problems with lines 596

Calls cannot be made (but can be received) 596
Dial tone absent on external lines 597
Hung lines at a telephone 598
Auto-answer line rings at a telephone 599
Prime telephone gets misdialed calls 601
Selected lines read Not in service or Not available 602
Selected line pool displays: No free lines 604

Problems with optional equipment 606

Analog Terminal Adapter 606

Running a Maintenance session to test an ATA 606
Auxiliary ringer 607
External paging 608
Music on Hold/Background Music trouble 608
KIM not working 609

Cold starting the KIM 609

Problems with trunk cartridges service 611

Digital Trunk Interface trouble 612
Monitoring the T1 or PRI signal 614

Problems with BRI service 615

The BRI card is connected to the ISDN network (U loop) but the

LED for one of more loops is not lit 615

Solution 615
Out of service displays when a BRI is selected

(LED for loop is lit) 616

All the LEDs on a BRI Card are flashing 616

20 /

Modular ICS 7.1 Installer Guide N0130943 02

Caller hears one ring and then a fast busy signal when placing

a call on a BRI line 617
ICS down 618
Trunk or Station Module down 619
Data Module down 620
Problems for network or remote users 621

Remote feature code gets no response 621
Dialed number gets ringback and the wrong person 622
Dialed number gets stuttered dial tone instead of ringback 623
Dialed number gets dial tone instead of ringback 623
Dialed number gets busy tone 624
Dialed number does not get through 624
Dialed DISA number gets ringback instead of stuttered dial

tone 627

Dialed DISA number gets dial tone instead of stuttered dial

tone 627

DISA user gets overflow tone when entering COS

password 628

Dialed feature code gets overflow tone 630
Dialed feature code gets busy tone 631
Line pool access code gets overflow tone 631
Line pool access code gets ringback 632
Line pool access code gets busy tone 633
Dialed number gets no response 634

Specifications 635

Norstar system 635
Digital Trunk Interface 637

Glossary 639

Index 659

N0130943 02 Modular ICS 7.1 Installer Guide

Regulations

North American Regulatory Information

Safety

This equipment meets all applicable requirements of both the
CSA C22.2 No.60950 and UL 60950.

The shock hazard symbol within an equilateral
triangle is intended to alert personnel to electrical
shock hazard or equipment damage. The following
precautions should also be observed when
installing telephone equipment.

Never install telephone wiring during a lightning storm.

Never install telephone jacks in wet locations unless
the jack is specifically designed for wet locations.

Never touch uninsulated telephone wires or terminals
unless the telephone line has been disconnected at the
network interface.

Use caution when working with telephone lines.

DANGER: Risk of shock.
Read and follow installation instructions carefully.

Ensure the system and system expansion units are
unplugged from the power socket and that any
telephone or network cables are unplugged before
opening the system or system expansion unit.
If installation of additional hardware and /or servicing is
required, disconnect all telephone cable connections
prior to unplugging the system equipment.
Ensure the system and system expansion units are
plugged into the wall socket using a three-prong power
cable before any telephone cables are connected.

22 / Regulations

Modular ICS 7.1 Installer Guide N0130943 02

Enhanced 911 Configuration

The exclamation point within an equilateral triangle is intended
to alert the user to the presence of important operating and
maintenance (servicing) instructions in the literature
accompanying the product.

CAUTION: Only qualified persons should service the

system.

The installation and service of this hardware is to be
performed only by service personnel having
appropriate training and experience necessary to be
aware of hazards to which they are exposed in
performing a task and of measures to minimize the
danger to themselves or other persons.
Electrical shock hazards from the telecommunication
network and AC mains are possible with this
equipment. To minimize risk to service personnel and
users, the system must be connected to an outlet with
a third-wire ground. Service personnel must be alert to
the possibility of high leakage currents becoming
available on metal system surfaces during power line
fault events near network lines. These leakage currents
normally safely flow to Protective Earth ground via the
power cord. Therefore, it is mandatory that connection
to an earthed outlet is performed first and removed last
when cabling to the unit. Specifically, operations
requiring the unit to be powered down must have the
network connections (central office lines) removed first.

CAUTION: Warning

Local, state and federal requirements for Emergency
911 services support by Customer Premises
Equipment vary. Consult your telecommunication
service provider regarding compliance with applicable
laws and regulations.

Regulations / 23

N0130943 02 Modular ICS 7.1 Installer Guide

Radio-frequency Interference

For information about 911 configuration, refer to
the Enhanced 911 (E911) Configuration section in
the Business Communications Manager
Programming Operations Guide or to the
Emergency 911 dialing section in the Modular ICS
Installer Guide.

WARNING: Equipment generates RF energy.

This equipment generates, uses, and can
radiate radio-frequency energy. If not installed
and used in accordance with the installation
manual, it may cause interference to radio
communications. It has been tested and found
to comply with the limits for a Class A computing
device pursuant to Part 15 of the FCC Rules and
with ICES.003, CLASS A Canadian EMI
Requirements. Operation of this equipment in a
residential area is likely to cause interference, in
which case the user, at his or her own expense,
will be required to take whatever measures may
be required to correct the interference.

24 / Telecommunication Registration

Modular ICS 7.1 Installer Guide N0130943 02

Telecommunication Registration

This equipment meets all applicable requirements of both
Industry Canada and US Federal Communications Commission
and has been registered under files Industry Canada 332D­5980A and FCC US: AB6KF15B20705 (key system), US:
AB6MF15B20706 (hybrid system), and US: AB6PF15B23740
(PBX system). Connection of this telephone system to the
nationwide telecommunications network is made through a
standard network interface jack that you can order from your
local telecommunications company. This type of customer­provided equipment cannot be used on party lines or coin lines.

Before installing this equipment, users should ensure that it is
permissible to be connected to the facilities of the local
telecommunications company. The equipment must also be
installed using an acceptable method of connection. The
customer should be aware that compliance with the above
conditions may not prevent degradation of service in some
situations.

Repairs to certified equipment should be made by an authorized
maintenance facility designated by the supplier. Any repairs or
alterations made by the user to this equipment, or equipment
malfunctions, may give the telecommunications company cause
to request the user to disconnect the equipment. Users should
ensure for their own protection that the electrical ground
connections of the power utility, telephone lines and internal
metallic water pipe system, if present, are connected together.
This precaution may be particularly important in rural areas.

CAUTION: Users should not attempt to make such
connections themselves, but should contact the
appropriate electric inspection authority, or electrician.

Telecommunication Registration / 25

N0130943 02 Modular ICS 7.1 Installer Guide

Network Connection

Canada and US

Hearing Aid Compatibility

System telephones are hearing-aid compatible, as defined in
Section 68.316 of Part 68 FCC Rules.

Electromagnetic Compatibility

This equipment meets all FCC Part 15, Class A radiated and
conducted emissions requirements.

This equipment does not exceed the Class A limits for radiated
and conducted emissions from digital apparatus as set out in
the Radio Interference Regulations of Industry Canada.

Table 1 Interface harmonized standards

Interface Harmonized Standard Description

CTM Industry Canada CS03

FCC Part 68/TIA-968-A

Analog terminal device

DTM Industry Canada CS03

FCC Part 68/TIA-968-A

T1 and Primary Rate
ISDN

BRIM Industry Canada CS03

FCC Part 68/TIA-968-A

Basic Rate ISDN

WAN Industry Canada CS03

FCC Part 68/TIA-968-A

T1

26 / Telecommunication Registration

Modular ICS 7.1 Installer Guide N0130943 02

Telephone Company Registration

It is usually not necessary to call the telecommunications
company with information on the equipment before
connecting the system to the telephone network. If the
telecommunications company requires this information,
provide the following:

• telephone number(s) to which the system will be
connected

• FCC registration number (on label affixed to the system)

• universal service order code (USOC)

• service order code (SOC)

• facility interface code (FIC)

Use of a Music Source

In accordance with U.S. Copyright Law, a license may be
required from the American Society of Composers, Authors
and Publishers, or similar organization if Radio or TV
broadcasts are transmitted through the Music On Hold or
Background Music features of this telecommunication system.

Nortel Networks hereby disclaims any liability arising out of
the failure to obtain such a license.

Rights of the Telecommunications Company

If the system is causing harm to the telephone network, the
telecommunications company may discontinue service
temporarily. If possible, the telecommunications company
will notify you in advance. If advance notice is not practical,
the user will be notified as soon as possible. The user will be
given the opportunity to correct the situation and informed of
the right to file a complaint to the FCC.

Telecommunication Registration / 27

N0130943 02 Modular ICS 7.1 Installer Guide

The telecommunications company may make changes in its
facilities, equipment, operations or procedures that could
affect the proper functioning of the system. If this happens, the
telecommunications company will give you advance notice in
order for you to make any necessary modifications to maintain
uninterrupted service.

Repairs

In the event of equipment malfunction, all repairs to certified
equipment will be performed by an authorized supplier.

28 / Canadian Regulations - please read carefully

Modular ICS 7.1 Installer Guide N0130943 02

Canadian Regulations - please read carefully

Notice

The term IC before the certification number located on the host
equipment only signifies that the Industry Canada technical
specifications were met. The Department does not guarantee
the equipment will operate to the user's satisfaction. Before
installing this equipment, users should ensure that it is
permissible to be connected to the facilities of the local
telecommunications company. The equipment must also be
installed using an acceptable method of connection. The
customer should be aware that compliance with the above
conditions may not prevent degradation of service in some
situations. Repairs to certified equipment should be
coordinated by a representative designated by the supplier.
Any repairs or alterations made by the user to this equipment,
or equipment malfunctions, may give the telecommunications
company cause to request the user to disconnect the
equipment. Users should ensure for their own protection that
the electrical ground connections of the power utility,
telephone lines and internal metallic water pipe system, if
present, are connected together. This precaution may be
particularly important in rural areas.

CAUTION: Users should not attempt to make such
connections themselves, but should contact the
appropriate electric inspection authority, or electrician,
as appropriate.

Canadian Regulations - please read carefully / 29

N0130943 02 Modular ICS 7.1 Installer Guide

Notice

The Ringer Equivalence Number (REN) assigned to each
terminal device provides an indication of the maximum
number of terminals allowed to be connected to a telephone
interface. The termination on an interface may consist of any
combination of devices subject only to the requirement that the
sum of the RENs of all the devices does not exceed 5.

This Class A device complies with ICES-003 Class A
Canadian EMI requirements. Operation is subject to the
following two conditions (1) This device may not cause
harmful interference and (2) this device must accept any
interference received, including interference that may cause
undesired operation.

Do not attempt to repair this equipment. If you experience
trouble, write for warranty and repair information:

Nortel Networks
30 Norelco Drive, Weston, Ontario
M9L 2X6 Canada

30 / US Regulations - please read carefully

Modular ICS 7.1 Installer Guide N0130943 02

US Regulations - please read carefully

Federal Communications Commission (FCC)
Notice

FCC registration number: This telephone equipment complies
with Rules and Regulations, of the FCC (TIA-968-A) for
direct connection to the Public Switched Telephone Network.
(The FCC registration number appears on a sticker affixed to
the bottom of the telephone.)

Your connection to the telephone line must comply with these
FCC rules:

• An FCC compliant telephone cord and modular plug is
provided with this equipment. This equipment is designed
to be connected to the telephone network premises wiring
using a compatible modular jack which is compliant. See
installation instructions for details.

• Use only an TIA-968-A-compliant Universal Service
Order Code (USOC) network interface jack, as specified in
the installation instructions, to connect this telephone to
the telephone line. (To connect the phone, press the small
plastic tab on the plug at the end of the phone’s line cord.
Insert into a wall or baseboard jack until it clicks. To
disconnect, press the tab and pull out.) See installation
instructions for details.

• If the terminal equipment causes harm to the telephone
network, the telephone company will notify you in
advance that temporary discontinuance of the product may
be required. But if advance notice isn’t practical, the
telephone company will notify you as soon as possible.
You will also be advised of your right to file a complaint
with the FCC, if you believe it is necessary.

US Regulations - please read carefully / 31

N0130943 02 Modular ICS 7.1 Installer Guide

• If a network interface jack is not already installed in your
location, you can order one from your telephone company.
Order the appropriate USOC Network interface jack, as
specified in the installation instructions, for wall-mounted
telephones or for desk/table use. In some states, customers
are permitted to install their own jacks.

• Your telephone may not be connected to a party line or
coin telephone line. Connection to Party Line Service is
subject to state tariffs. (Contact the state public utility
commission, public service commission or corporation
commission for information.)

• It is no longer necessary to notify the Telephone Company
of your phone’s Registration and REN numbers. However,
you must provide this information to the telephone
company if they request it. The telephone company may
make changes in its facilities, equipment, operation or
procedures that could affect the operation of the
equipment. If this happens the telephone company will
provide advance notice in order for you to make necessary
modification to maintain uninterrupted service.

• Do not attempt to repair this equipment. If you experience
trouble, write for warranty and repair information:

Nortel Networks
640 Massman Drive,
Nashville, TN, 37210, USA

Ringer Equivalence Number

The FCC Registration label (on bottom of phone), includes a
Ringer Equivalence Number (REN), which is used to
determine the number of devices you may connect to your
phone line. A high total REN may prevent phones from
ringing in response to an incoming call and may make placing
calls difficult. In most areas, a total REN of 5 should permit

32 / US Regulations - please read carefully

Modular ICS 7.1 Installer Guide N0130943 02

normal phone operation. To determine the total REN allowed
on your telephone line, consult your local telephone company.

Hearing Aids

This phone is compatible with hearing aids equipped with an
appropriate telecoil option.

Programming Emergency Numbers

When programming emergency numbers and/or making test
calls to emergency numbers:

1. Remain on the line and briefly explain to the dispatcher the
reason for calling before hanging up.

2. Perform such activities in the off-peak hours, such as early
mornings or late evenings.

EMI/EMC (FCC Part 15)

Note: This equipment has been tested and found
to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable
protection against harmful interference in a
residential installation. This equipment generates,
uses and can radiate radio frequency energy and,
if not installed and used in accordance with the
instructions, may cause harmful interference to
radio communications. However, there is no
guarantee that interference will not occur in a
particular installation. If this equipment does
cause harmful interference to radio or television
reception, which can be determined by turning the
equipment off and on, the user is encouraged to
try to correct the interference by one or more of
the following measures:

US Regulations - please read carefully / 33

N0130943 02 Modular ICS 7.1 Installer Guide

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and
receiver.

• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician
for help.

Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to
operate the equipment.

34 / Important Safety Instructions

Modular ICS 7.1 Installer Guide N0130943 02

Important Safety Instructions

The following safety instructions cover the installation and use
of the Product. Read carefully and retain for future reference.

Installation

1. Never install telephone wiring during a lightning storm.

2. Never install telephone jacks in wet locations unless the
jack is specifically designed for wet locations.

3. Never touch uninsulated telephone wires or terminals
unless the telephone line has been disconnected at the
network interface.

4. Use caution when installing or modifying telephone lines.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the product.

This symbol on the product is used to identify the
following important information: Use only with a CSA or
UL certified CLASS 2 level C power supply, as specified
in the user guide.

WARNING: To avoid electrical shock hazard to
personnel or equipment damage observe the
following precautions when installing telephone
equipment:

Important Safety Instructions / 35

N0130943 02 Modular ICS 7.1 Installer Guide

Use

When using your telephone equipment, basic safety
precautions should always be followed to reduce risk of fire,
electric shock and injury to persons, including the following:

1. Read and understand all instructions.

2. Follow the instructions marked on the product.

3. Unplug this product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners. Use a damp
cloth for cleaning.

4. Do not use this product near water, for example, near a
bath tub, wash bowl, kitchen sink, or laundry tub, in a wet
basement, or near a swimming pool.

5. Do not place this product on an unstable cart, stand or
table. The product may fall, causing serious damage to the
product.

6. This product should never be placed near or over a radiator
or heat register. This product should not be placed in a
built-in installation unless proper ventilation is provided.

7. Do not allow anything to rest on the power cord. Do not
locate this product where the cord will be abused by
persons walking on it.

8. Do not overload wall outlets and extension cords as this
can result in the risk of fire or electric shock.

9. Never spill liquid of any kind on the product.

10. To reduce the risk of electric shock do not disassemble this
product, but have it sent to a qualified service person when
some service or repair work is required.

36 / Important Safety Instructions

Modular ICS 7.1 Installer Guide N0130943 02

11. Unplug this product from the wall outlet and refer
servicing to qualified service personnel under the
following conditions:

a When the power supply cord or plug is damaged or

frayed.

b If the product has been exposed to rain, water or liquid

has been spilled on the product, disconnect and allow the
product to dry out to see if it still operates; but do not
open up the product.

c If the product housing has been damaged.

d If the product exhibits a distinct change in performance.

12. Avoid using a telephone during an electrical storm. There
may be a remote risk of electric shock from lightning.

13. Do not use the telephone to report a gas leak in the vicinity
of the leak.

14. Caution: To eliminate the pos sibility of accidental damage
to cords, plugs, jacks, and the telephone, do not use sharp
instruments during the assembly procedures.

15. Warning: Do not insert the plug at the free end of the
handset cord directly into a wall or baseboard jack. Such
misuse can result in unsafe sound levels or possible
damage to the handset.

16. Save these instructions.

International Regulatory Information / 37

N0130943 02 Modular ICS 7.1 Installer Guide

International Regulatory Information

This is a class A product. In a domestic environment this
product may cause radio interference in which case the user
may be required to take adequate measures.

Hereby, Nortel Networks declares that this equipment is in
compliance with the essential requirements and other relevant
provisions of Directive 1999/5/EC.

Information is subject to change without notice. Nortel
Networks reserves the right to make changes in design or
components as progress in engineering and manufacturing
may warrant. This equipment has been tested and found to
comply with the European Safety requirements EN 60950 and
EMC requirements EN 55022 (Class A) and EN 55024. These
EMC limits are designed to provide reasonable protection
against harmful interference when the equipment is operated
in a commercial and light industrial environment.

The CE Marking on this equipment
indicates compliance with the following:

This device conforms to Directive 1999/5/
EC on Radio Equipment and
Telecommunications Terminal
Equipment as adopted by the European
Parliament And Of The Council.

38 / International Regulatory Information

Modular ICS 7.1 Installer Guide N0130943 02

WARNING

This is a class A product. In a domestic
environment this product may cause radio
interference in which case the user may be
required to take adequate measures. The
above warning is inserted for regulatory
reasons. If any customer believes that they
have an interference problem, either because
their Nortel Networks product seems to cause
interference or suffers from interference, they
should contact their distributor immediately.
The distributor will assist with a remedy for
any problems and, if necessary, will have full
support from Nortel Networks.

Safety / 39

N0130943 02 Modular ICS 7.1 Installer Guide

Safety

WARNING!

Only qualified service personnel may install this
equipment. The instructions in this manual are
intended for use by qualified service personnel
only.

Risk of shock.

Ensure the system is unplugged from the power
socket and that any telephone or network cables
are unplugged before opening the system.

Read and follow installation instructions carefully

40 / Safety

Modular ICS 7.1 Installer Guide N0130943 02

Additional Safety Information

The following interfaces are classified as Telecommunication
Network Voltage (TNV) circuits, and may be connected to
exposed plant:

• DTM interface

• WAN interface

• TCM Isolator

Only qualified persons should service the
system.

The installation and service of this hardware is
to be performed only by service personnel
having appropriate training and experience
necessary to be aware of hazards to which
they are exposed in performing a task and of
measures to minimize the danger to
themselves or other persons.

Electrical shock hazards from the
telecommunication network and AC mains are
possible with this equipment. To minimize risk
to service personnel and users, the system
must be connected to an outlet with a third-wire
Earth.

Service personnel must be alert to the
possibility of high leakage currents becoming
available on metal system surfaces during
power line fault events near network lines.
These leakage currents normally safely flow to
Protective Earth via the power cord. Therefore,
it is mandatory that connection to an earthed
outlet is performed first and removed last when
cabling to the unit. Specifically, operations
requiring the unit to be powered down must
have the network connections (exchange lines)
removed first.

Safety / 41

N0130943 02 Modular ICS 7.1 Installer Guide

• ASM8+: The Nortel Networks ASM8+ I/O ports are
designated as OPX. This product does provide

Telecommunications Ringing Voltages and can be configured
to provide Voltage Message Waiting Indicator (VMWI).
Installation of this device and all connections to this device must
be performed by Qualified Installation Personnel who are aware
of the hazards associated with telecommunications wiring and
are aware of the local regulations for treatment of
telecommunications wiring for OPX deployment.

The following interfaces are classified as Safety Extra Low
Voltage (SELV) circuits, and shall not be connected to
exposed plant:

• BRIM Interface

• TCM extensions

• external music sources (MSCX)

• auxiliary ringer (AUX)

• paging system relay (PAGE)

• serial port

• LAN interface

The following interfaces are classified as Telecommunication
Network Voltage (TNV) circuits, and shall NOT be connected
to exposed plant:

•ATA II

42 / Limited Warranty

Modular ICS 7.1 Installer Guide N0130943 02

Limited Warranty

Nortel Networks warrants this product against defects and
malfunctions during a one (1) year period from the date of
original purchase. If there is a defect or malfunction, Nortel
Networks shall, at its option, and as the exclusive remedy,
either repair or replace the telephone set at no charge, if
returned within the warranty period.

If replacement parts are used in making repairs, these parts
may be refurbished, or may contain refurbished materials. If it
is necessary to replace the telephone set, it may be replaced
with a refurbished telephone of the same design and color. If it
should become necessary to repair or replace a defective or
malfunctioning telephone set under this warranty, the
provisions of this warranty shall apply to the repaired or
replaced telephone set until the expiration of ninety (90) days
from the date of pick up, or the date of shipment to you, of the
repaired or replacement set, or until the end of the original
warranty period, whichever is later. Proof of the original
purchase date is to be provided with all telephone sets returned
for warranty repairs.

Exclusions

Nortel Networks does not warrant its telephone sets to be
compatible with the equipment of any particular telephone
company. This warranty does not extend to damage to
products resulting from improper installation or operation,
alteration, accident, neglect, abuse, misuse, fire or natural
causes such as storms or floods, after the telephone is in your
possession.

Nortel Networks shall not be liable for any incidental or
consequential damages, including, but not limited to, loss,
damage or expense directly or indirectly arising from the

Limited Warranty / 43

N0130943 02 Modular ICS 7.1 Installer Guide

customers use of or inability to use this telephone, either
separately or in combination with other equipment. This
paragraph, however, shall not apply to consequential damages
for injury to the person in the case of telephones used or
bought for use primarily for personal, family or household
purposes.

This warranty sets forth the entire liability and obligations of
Nortel Networks with respect to breach of warranty, and the
warranties set forth or limited herein are the sole warranties
and are in lieu of all other warranties, expressed or implied,
including warranties or fitness for particular purpose and
merchantability.

Warranty Repair Services

Should the set fail during the warranty period:
In North America, please call 1-800-574-1611 for further
information.
Outside North America, contact your sales representative for
return instructions. You will be responsible for shipping
charges, if any. When you return this telephone for warranty
service, you must present proof of purchase.

After Warranty Service

Nortel Networks offers ongoing repair and support for this
product. This service provides repair or replacement of your
Nortel Networks product, at Nortel Networks option, for a
fixed charge. You are responsible for all shipping charges. For
further information and shipping instructions:
In North America, contact our service information number:
1-800-574-1611.
Outside North America, contact your sales representative.

Repairs to this product may be made only by the manufacturer
and its authorized agents, or by others who are legally

44 / Limited Warranty

Modular ICS 7.1 Installer Guide N0130943 02

authorized. This restriction applies during and after the
warranty period. Unauthorized repair will void the warranty.

N0130943 02 Modular ICS 7.1 Installer Guide

How to use this document

This guide provides core installation and programming
information for MICS 7.1 and MICS-XC 7.1 systems.

• The MICS system can be a mini (no expansion cartridge
installed), a midi (installed with a two-port expansion
cartridge), a maxi (installed with a six-port expansion
cartridge), or a mega (Combination Fiber six-port Services
Cartridges and Services cartridges for a total of 14 ports)
system. For more information about the configurations,
see Connecting expansion modules on page 242.

• The MICS-XC system has all the functionality of MICS,
plus it supports module 13 and 14, which, starting with this
release, provides additional digital/analog telephone
support as well as the legacy Companion wireless
functionality. This version of MICS software supports
existing Companion functionality, although the product is
no longer available. If your system will continue to use
Companion handsets, refer to Companion documentation
from previous releases for installation and configuration
information.

Both systems support ISDN PRI and BRI, and T1
functionality. All MICS 7.1 functionality is described in this
book. For system coordinators, the MICS 7.1 System
Coordinator Guide explains how to perform common
telephone programming.

Information that is specific to MICS-XC systems or MICS
systems is clearly marked within this guide.

Note:Throughout this guide, reference to KSU refers to

the Integrated Communication System (ICS).

46 / How to use this document

Modular ICS 7.1 Installer Guide N0130943 02

N0130943 02 Modular ICS 7.1 Installer Guide

What’s new with Norstar

New feature for Version 7.1

• Extended DST rules begin in March 2007. Daylight
Savings Time is extended by four weeks from the second
Sunday of March to end on the first Sunday of November.
The options under AutoDS Time have changed to reflect
these new rules. Now the settings are Std (standard), Extd
(extended), or None.

New features and hardware for version 7.0

This software version introduces the following features:

• Digital/analog telephone support on station modules
installed in ports 13 and 14 on a mega system (MICS-XC
software). In previous releases, these ports only supported
Companion functionality. Each module supports 16
telephones. Refer to 14-port expansion system (mega) and
ICS numbering on page 262.

To upgrade from any previous version of
MICS software to MICS 7.1, refer to
Upgrading your Norstar system on page 207
for detailed instructions.

Mega

modules

Systems upgraded to 7.0 New 7.0 system

B1 DNs B2 DNs B1 DNs B2 DNs

Module 13 605-620 737-752 413-428 637-652

Module 14 621-636 753-768 429-444 653-668

48 / What’s new with Norstar

Modular ICS 7.1 Installer Guide N0130943 02

• An additional 32 target lines have been added to the core
system for mega systems. The target line range for a Mega
system is now 157-380.

• The Nortel Networks Digital Mobility system provides
wireless communication with the MICS. This product
provides access to many system features, but does have
some restrictions. The Norstar Networks Digital Mobility
Controller (DMC) provides the functional connection
between the MICS and the Nortel Networks Digital
Mobility basestations and handsets. The hardware
installation, system configuration, and handset feature
operation instructions are contained in separate Nortel
Networks Digital Mobility documentation.
The following additions have been added to system
programming to support the handsets:

— New model name (UserPrefrences): DMC prtb.
— Under Maintenance: Nortel Networks Digital Mobility

model name and software version were added to Port/
DN Status.

— New defaults for Nortel Networks Digital Mobility:

Handsfree defaults to None and Dial Modes (User
Prefrences) only supports Standard dial. Predial is
allowed through the handset programming.

— These handsets emulate the model 7100 digital phones

quite closely, but there are some feature control
differences because of how the wireless portable
communications with the system. These will be noted
where applicable. Also, unlike the 7100 digital phone,
the handset has a four-line, 16-character-per-line
display and softkey access to display prompts.

• ≤≤ brings up a display when the handset is in the
idle state.

What’s new with Norstar / 49

N0130943 02 Modular ICS 7.1 Installer Guide

Changes for version 7.0

The following information has been changed or removed from
the software or from the documentation.

• SWCA enhancements:
— Added in system configuration: Under Capabilities

SWCA call group allows you to assign SWCA codes
to telephones. This feature works for all telephones, but
can be used specifically to allow SWCA features for
telephones that do not have call appearance indicators,
such as the Digital Mobility phone or the 7000 and
7100 digital phones.
This setting does not assign the codes to memory
buttons on the telephones. As in previous releases, use
the Button Programming tables to assign SWCA codes
to physical buttons (with indicators). This feature
allows telephones that do not have SWCA codes
assigned to buttons to use the SWCA park and retrieve
codes described below. Refer to Capabilities on page

345.

— Changed: SWCA access codes have shifted from

•fi¤‚ to •fi‹fi to •fi¤⁄ to

•fi‹fl.

— Changed: SWCA cntrl (Feature settings):

Auto associate now has three choices, rather than a Y/
N value.

• Manual on park

• Manual LOC

• Automatic LOC
Next to Auto associate is a new prompt:

Auto ASSC: I/C with a Y/N value.
Next to Invoke by hold is a new prompt:

SWCA hold I/C with a Y/N value

50 / What’s new with Norstar

Modular ICS 7.1 Installer Guide N0130943 02

Notes:

• The 7000 and 7100 digital telephones and the Digital
Mobility phone does not support the Invoke by hold
setting for this feature.

• If your system is running a private network with the
MCDN feature TAT running, and Automatic LOC is
active for intercom calls, the caller must ensure that
at least two SWCA buttons or assignments are
available for the call to complete.

Refer to Setting SWCA controls on page 442.

— Added: Feature •fi¤‚ searches for the next

available free assigned SWCA position and parks the
call on that button/code.

— Added: Feature •fi‹‡ retrieves the call that has

been sitting on an assigned SWCA position the longest.

— Added: Feature •fi‹° retrieves the call that has

most recently been parked on an assigned SWCA
position.

— Added to programming: ≤••Í‰ÊÍ now

also displays the SWCA call prompt that allows you to
assign SWCA codes to telephones that do not have
available memory buttons with indicators.

• Default DN numbering for portable handsets, ISDN
devices and Hunt groups have also changed.

DN type Systems upgraded

to 7.0

New 7.0 system

ISDN 667-696 699-728

Portable 637-666 669-698

Hunt group 707-736 739-768

What’s new with Norstar / 51

N0130943 02 Modular ICS 7.1 Installer Guide

• Legacy only: References to the Norstar M-series legacy
telephones and Companion telephones, except where
specific references are required to further define the digital
phones. Default button settings for these telephones have
been retained in the Programming Record. Installation
information documentation for these telephones was
provided on the CD with previous versions of MICS
software.

Features from 6.1MR addendum

The following features were introduced with the MICS 6.1MR
(Maintenance Release) software in the Modular and Compact

ICS 6.1 Maintenance Release (MR) Documentation Update

addendum (P0609198 02):

• The enhanced Call log feature allows you to log all calls to
a telephone, or to gather logs for specific lines assigned to
a telephone. The Call log set feature allows you to
determine which assigned lines will collect logs. Refer to
Call log set on page 358 and Call log on page 437. (all
profiles)

• The second dial tone table allows the user to enter up to 10
one to four-digit numbers that, when dialed, will cause the
system to produce a second dial tone, at which time the
user can enter the remaining call digits. Refer to
Configuring the second dial tone table on page 403. (all
profiles)

• Profiles 1 and 4, PRI: The Send Name Display feature
allows you to specify if you want the business name and
OLI to be transmitted over specific PRI lines. This setting
appears for PRI cards set to SL1, NI-2, DMS100, or
DMS250 protocols.

52 / What’s new with Norstar

Modular ICS 7.1 Installer Guide N0130943 02

7316E digital phone upgrade note: The addendum also made
reference to the reconfiguration that occurs for 7316E digital
phones installed on pre-6.1 systems that are upgraded to 6.1 or
newer software. On systems prior to 6.1, the 7316E acts as a
7316 digital phone. When an upgrade to 6.1 or newer software
occurs, the 7316E reconfigures as a 7316E, which means that
any memory button programming is lost. As well, line button,
Answer DN, and intercom assignments shift to the 7316E
defaults. Refer to the MICS 7.1 System Coordinator Guide for
details about default button programming for both these
telephones.

N0130943 02 Modular ICS 7.1 Installer Guide

Welcome to ISDN

This chapter provides you with some background information
about ISDN, including information about:

• analog vs. ISDN

• type of ISDN service

•ISDN layers

• ISDN bearer capability

• services and features for ISDN PRI and BRI

• ISDN hardware

• ISDN standards compatibility

Integrated Services Digital Network (ISDN) technology
provides a fast, accurate, and reliable means of sending and
receiving voice, data, images, text, and other information
through the telecom network.

ISDN uses existing analog telephone wires. The signal on the
wire gets divided into separate digital channels, which
dramatically increases the bandwidth.

ISDN uses a single transport to carry multiple information
types. What once required separate networks for voice, data,
images, or video conferencing is now combined on to one
common high-speed transport.

Note: Nortel endeavors to test all variations of ISDN BRI and

PRI on Norstar. However, due to the number of
variations, this is not always possible. Check with your
service provider about compatibility.

54 / Welcome to ISDN

Modular ICS 7.1 Installer Guide N0130943 02

Comparing ISDN to Analog

ISDN offers significantly higher bandwidth and speed than
analog transmission because of its end-to-end digital
connectivity on all transmission circuits. Being digital allows
ISDN lines to provide better quality signaling than analog
POTS (plain ordinary telephone) lines. Also ISDN out-of­band data channel signaling offers faster call setup and tear
down.

While an analog line carries only a single transmission at a
time, an ISDN line can carry one or more voice, data, fax and
video transmissions simultaneously.

An analog modem operating at 14.4 K takes about 4.5 minutes
to transfer a 1 MB data file, while a 28.8K modem takes about
half that time. Using one channel of an ISDN line, the transfer
time is reduced to only one minute. If two ISDN channels are
used, transfer time is just 30 seconds.

When transmitting data, the connect time for an average ISDN
call is about three seconds per call, compared to about 21
seconds for the average analog modem call.

Type of ISDN service

Two types of ISDN services (lines) are available: Basic Rate
Interface (BRI) and Primary Rate Interface (PRI). Each line is
made up of separate channels known as B and D channels
which transmit information simultaneously.

• BRI is known as 2B+D because it consists of
2 B-channels and one D-channel.

• PRI is known as 23B+D because it consists of
23 B-channels and one D-channel.

Welcome to ISDN / 55

N0130943 02 Modular ICS 7.1 Installer Guide

B channels

B channels are the bearer channel. They are used to carry voice
or data information and have speeds of 64 kbps. Since each
ISDN line (BRI or PRI) has more than one B-channel, more
than one transmission can occur at the same time, using a
single ISDN line.

D channels

The standard signaling protocol is transmitted over a dedicated
data channel called the D-channel. The D-channel carries call
setup and feature activation information to the destination.
This channel has speeds of 16 kbps (BRI) and 64 kbps (PRI).
Data information consists of control and signal information
and packet-switched data such as credit card verification.

ISDN layers

ISDN layers refer to the standards established to guide the
manufacturers of ISDN equipment. The layers include both
physical connections, such as wiring, and logical connections,
which are programmed in computer software.

When equipment is designed to the ISDN standard for one of
the layers, it works with equipment for the layers above and
below it.

There are three layers at work in ISDN for Norstar. To support
ISDN service, all three layers must be working properly.

Tip - Norstar PRI supports the D-channel on the 24th

channel only. Norstar does not include support for a
backup D-channel on the span.

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Layer 1: A physical connection that supports fundamental
signaling passed between the ISDN network (your service
provider) and the Norstar ICS. When a DTI card configured as
BRI or PRI is used for a network connection, the LED for the
loop on the card is lit when the layer 1 is functioning.

Layer 2: A logical connection between the ISDN network
(your service provider) and the Norstar ICS. Norstar has two
of these connections for each BRI line, one for each of the
logical lines. Without Layer 2, call processing is not possible,
and there is no dial tone.

Layer 3: Also a logical connection between the ISDN network
(your service provider) and the Norstar ICS. For BRI lines,
layer 3 is where call processing and service profile identifier
(SPID) information is exchanged. This controls which central
office services are available to the connection. For example, a
network connection can be programmed to carry data calls.

The system of layers is important when you are installing,
maintaining, and troubleshooting an ISDN system. See
Problems with BRI service on page 615 for more information
about working with the layers.

ISDN bearer capability

Bearer capability describes the transmission standard used by
the BRI or PRI line that allows it to work within a larger ISDN
hardware and software network.

The bearer capability for BRI and PRI is voice/speech at

3.1 kHz audio, and data at unrestricted 64 kbps, restricted

64 kbps, 56 kbps.

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Services and features for ISDN PRI and BRI

As part of an ISDN digital network, your Modular ICS
supports enhanced capabilities and features, including:

• faster call setup and tear down

• high quality voice transmission

• dial-up Internet and local area network (LAN) access

• video transmission

• network name display

• name and number blocking (PRI, BRI and analog)

• access to public protocols (only NI-1 for BRI)

PRI services and features

• call by call service selection

• dialing plan

• Emergency 911 dialing, internal extension number
transmission

• Advanced Private Networking to Meridian 1 using SL-1
protocol, providing

– access to central Voice Mail and Automated Attendant

equipment connected to the Meridian system

– Message Waiting Indication (MWI) from the Voice

Mail application

– Network Call Redirection Information (NCRI), which

is built on the existing Call Forward and Call Transfer

features
– trunk route optimization (TRO)
– trunk anti-tromboning (TAT)
– ISDN call connection limitation (ICCL)

• tandem networking between Norstar systems

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BRI services and features

• data transmission at speeds up to 128 kbps per loop,
depending on the bandwidth supported by your service
provider

• shared digital lines for voice and data ISDN terminal
equipment

Norstar Basic Rate Interface (BRI) cards also support
D-channel packet service between a network and terminal
connection. This allows you to add applications such as point­of-sale terminals without additional network connections.

Any analog or digital network connections can be shared by all
Norstar telephones, peripherals and applications, and ISDN
terminal equipment (TE).

Modular ICS supports the following ISDN services and
features offered by ISDN service providers:

• D-channel packet service (BRI only) to support devices
such as transaction terminals. Transaction terminals are
used to swipe credit or debit cards and transmit the
information to a financial institution in data packets.

• calling number identification, which appears on both
Norstar sets and ISDN terminal equipment with the
capability to show the information

• Multi-Line Hunt or DN Hunting which switches a call to
another ISDN line if the line usually used by the Network
DN is busy. (BRI only)

• subaddressing of terminal equipment (TE) on the same
BRI loop. However, terminal equipment which supports
sub-addressing is not commonly available in North
America. (BRI only)

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Transmission of B-channel packet data is not supported by
Modular ICS.

Contact your ISDN service provider for more information
about these services and features. Packages for ISDN service
in North America are described on page 74.

The terminal equipment (TE) connected to the Norstar system
can use some feature codes supported by the ISDN service
provider. Refer to ISDN services and features in the Modular
ICS 7.1 System Coordinator Guide for more information.

Feature descriptions

The following section provides brief descriptions about the
ISDN features, and links for more programming information.

Network name display

This feature allows ISDN to deliver the Name information of
the users to those who are involved in a call that is on a public
or private network. For information about system
programming for this feature see, BusName on page 467.

Systems with Advanced Private Networking connections
(MCDN SL-1) to a Meridian system also retain information
about sets that have forwarded or transferred a call, as well as
the originating caller information.This feature is called
Network Call Redirection Information (NCRI). This
information is available to all parties involved in the call.

Calls can only be redirected for a defined number of times
within the network. This is currently hardcoded to five times.
Once this limit is reached, call redirection will be disallowed
for any type of outgoing line being presented for redirection.

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Instead, the call will be handled in one of these ways:

• If Call Forward on Busy is programmed, the call will ring
if a free key is available. Otherwise, it goes to the Prime
set. DND Busy programming is ignored.

• If Call Forward All Calls is programmed, the call will go
to the Prime set.

• If Call Forward No Answer is programmed, the call will
continue to ring at the destination.

Note: If a terminal rejects a call, the call goes to the Prime set,

if a Prime set is configured for the target line. If the
target line is configured to send a busy tone, the call
gets released with the reason as User Busy.

Message Waiting Indicator (MWI)

Systems with Advanced Private Networking connections to a
Meridian system Voice Mail system provide message-waiting
indicators at telephones connected to those lines. Telephones
with displays display a message. Non-display terminals may
have a lamp that lights when a message is waiting. The setting
for this feature is defined from the Meridian system.

Name and number blocking

This feature suppresses the outgoing name and/or number on
a call-by-call basis. For information on system programming
of this feature see, Outgoing Name and Number Blocking on
page 471. You can also set a PRI module to allow or block
outgoing caller information. Use this feature if lines are
connected to switches that do not support name display. Refer
to Send Name Display (PRI) on page 525.

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External call forwarding

The system now allows you to forward calls to an external
number. This feature is activated using ≤› from the
telephone.

MCDN trunk features

Systems with MCDN Private Networking connections can
provide these trunk routing features:

• Trunk Route Optimization (TRO) finds the most direct
route through the network to send a call between nodes.
This function occurs during the initial alerting phase of a
call.

• ISDN Call Connection Limitation: The ICCL feature
piggybacks on the call initiation request and acts as a check
at transit PBX points to prevent misconfigured routes or
calls with errors from blocking channels.

• Trunk Anti-tromboning (TAT) is a call-reroute feature that
works to find better routes during a transfer of an active
call. This feature acts to prevent unnecessary tromboning
of trunks. This action occurs after the speech path has been
established.

Call by Call service selection for PRI

Call by Call service selection allows a user to access services
or private facilities over a PRI line without the use of dedicated
facilities. Various types of services such as FX, Tie, and
OUTWATS are available, depending on the Protocol that is
selected. Private network settings are used for tandem
networking and Advanced Private Networking.

Outgoing calls are routed through a dedicated PRI Pool and the
calls can be routed based on various schedules.

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For information about system programming of this feature, see
Programming Call by Call service selection on page 475.

For services information about dialing plans and PRI, see
Networking with Norstar on page 109 and Dialing Plan on
page 451.

Refer to the hardware section for Call-by-call routing on page

499.

Emergency 911 dialing

Modular ICS 7.1 with the ISDN PRI feature is capable of
transmitting the telephone number and internal extension
number of a calling station dialing 911 to the Public Switched
Telephone Network.

State and local requirements for support of Emergency 911
dialing service by Customer Premises Equipment vary.
Consult your local telecommunications service provider
regarding compliance with applicable laws and regulations.
For most installations, the following configuration rules
should be followed, unless local regulations require other
settings.

• All PSTN connections must be over PRI.

• In order for all sets to be reachable from the Public Safety
Answering Point (PSAP), the system must be configured
for DID access to all sets. In order to reduce confusion, the
dial digits for each telephone should be configured to
correspond to the extension number (DN).

• The OLI digits for each telephone should be identical to
the DID dialed digits for the telephone.

• The System Coordinator is responsible for maintaining a
site map or location directory that allows emergency

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personnel to rapidly locate a telephone given its DID
number. This list should be kept up to date and readily
available, and can be included in the Programming Record

• The routing table should route 911 to a public line or line
pool.

• If attendant notification is required, the routing table must
be set up for all 911 calls to use a dedicated line which has
an appearance on the attendant console.

Note: The actual digit string 911 is not hard-coded into the

system. More than one emergency number can be
supported

MCID (Profile 2)

The MCID feature allows you to use ≤°·‡ to have
call information recorded on the central office database for an
incoming call on a specific line (EUROISDN lines, only).

The user must invoke the feature code during the active call or
within 30 seconds (time varies on different networks) after the
caller hangs up. The user must remain on the line to enter the
code.

Network Call Diversion (Profile 2)

This feature is a network function of ETSI E1 lines that allows
forwarding and redirection of calls outside the Norstar
network when using an ETSI ISDN line. Functionality is
similar to that of External Call Forward (ECF). NCD redirects
calls using the same line on which they arrive. Call forward is
efficient since there is no need for additional outside lines.

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DTI card configured as a PRI card

The DTI card on your Norstar system can be configured to
support PRI. For information about configuring a DTI card as
a PRI type card, see Provisioning the DTI card for PRI on page

497.

ISDN hardware

To support connections to an ISDN network and ISDN
terminal equipment, your Modular ICS must be equipped with
one or more BRI cards (BRI-U or BRI-ST), a DTI card
configured for PRI, and a Combination Fiber 6-port Services
Cartridge or a Services Cartridge.

DTI card configured as PRI

A DTI card configured as PRI provides one T loop. Refer to
T reference points on page 68 for more information.

In most PRI network configurations, you need one DTI card
configured as PRI in your ICS to act as the primary clock
reference. The only time when you may not have PRI
designated as the primary clock reference is in a network
where your Norstar system is connected back-to-back with
another switch using a PRI link, such as is the case with the
Advanced Private Networking configuration.

However, if the other switch is loop-timed to your Norstar
system, your DTI card, configured as PRI, can be designated
as a timing master.

If your Norstar has two DTI cards configured as PRI, you
cannot assign both cards as the primary reference or both cards
as the secondary reference. You can only have one primary
reference and one secondary reference per system. Refer to
ClockSrc on page 506 for more information.

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BRI Card

The loops on BRI-U and BRI-ST cards can be programmed to
support either network or terminal connections. This allows
you to customize your arrangement of lines, voice terminals,
data terminals and other ISDN equipment.

Detailed wiring information for BRI and PRI network and
terminal connections is included in the Installation on page

227.

BRI-U2 and BRI-U4 card

A BRI-U2 card supports two loops and the BRI-U4 supports
four loops. Each loop can be individually programmed to
provide one of the following:

• a U-LT reference point connection for terminal equipment
(TE) with built-in NT1 functionality (U interface)

• a U-NT reference point connection for direct connection to
an ISDN network

BRI-ST card

A BRI-ST card provides four loops. Each loop can be
individually programmed to one of the following:

• an S reference point connection (S loop) to ISDN terminal
equipment (TE)

• a T or S reference point connection (T loop or S loop) to an
ISDN network using an external NT1

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U-LT reference point

The U-LT reference point connection provides a point-to­point digital connection between Norstar and TE equipped
with a U interface.

A U-LT loop supports up to eight ISDN DNs, which identify
TE to the ICS. Refer to the example below.

U-NT reference points

The U-NT reference point connection provides a point-to­point digital connection between the ISDN network and the
ICS.

A U-NT loop provides lines that can be used by all Norstar
telephones, peripherals and applications, and ISDN TE.

point-to-point

U-LT

ICS

U interface TE

network
connection

U-NT

ICS

ISDN

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U-NT and U-LT loops can be used in combination to provide
D-packet service for a point-of-sale terminal adapter (POSTA)
or other D-packet device. D-packet service is a 16 kbps data
transmission service that uses the D-channel of an ISDN line.

To deliver D-packet service, a network connection (U-NT) is
programmed to work with a terminal connection (U-LT). The
loops must be on the same physical card. For example, if the
network connection is a loop found on the BRI Card in Slot 1,
the terminal connection must be a loop found on the same card.

S reference point

The S reference point connection provides either a point-to­point or point-to-multipoint digital connection between
Norstar and ISDN terminal equipment (TE) that uses an
S interface.

S loops support up to seven ISDN DNs, which identify TE to
the ICS.

Inspect FORWARD Callers

Inspect FORWARD Callers

MXP

S

S

Inspect FORWARD Callers

MXP

Inspect FORWARD Callers

Inspect FORWARD Callers

MXP

point-to-point

ISDN TE

ISDN TE

ISDN TE
(with terminating
resistors)

ICS

ISDN TE
(with terminating resistors)

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T reference points

The T reference point connections provide a point-to-point
digital connection between the ISDN network and Norstar.

A T loop provides lines that can be shared by all Norstar
telephones, peripherals and applications, and ISDN TE.

A T loop can be used in combination with an S loop to provide
D-packet service for a point-of-sale terminal adapter (POSTA)
or other D-packet device. D-packet service is a 16 kbps data
transmission service that uses the D-channel of an ISDN line.

To deliver D-packet service, a network connection (T loop) is
programmed to work with a terminal connection (S loop). The
loops must be on the same physical card. For example, if the
network connection is a loop found on the BRI Card in Slot 1,
the terminal connection must be a loop found on the same card

network
connection

T

ICS

ISDN

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Clock source for ISDN cards

Systems with ISDN interfaces need to synchronize clocking
with the ISDN network and any connected ISDN terminal
equipment. Clocking synchronization is supported by either a
Combination Fiber 6-port Services Cartridge or a Services
Cartridge.

The Modular ICS derives timing from the network using
U-NT and T reference points (loops). Terminal equipment on
U-LT and S reference points (loops) derive timing from the
ICS.

Systems synchronize clocking to the first-available functional
network connection. If there are excessive errors on the
reference network connection, or if the loop fails, the next­available functional network connection is used for clock
synchronization.

The clock synchronization process generates alarm codes and
event messages. See the Alarm codes on page 548 and Event
messages on page 555 for more information.

When you configure the network connections to the Modular
ICS, you should take into account the system preferences for
selecting loops for synchronization:

• lower numbered loops have preference over higher
numbered loops

• the loop preference order is: 201, 202, 203, 204, 225, 226,
227, 228 (Profile 1, 3 and 4), or 201, 202, 203, 204, 231,
232, 233, 234 (Profile 2)

• the system skips U-LT, S, and analog loops when selecting
a network connection for synchronization

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Systems with only U-LT and S loops act as timing masters for
the attached terminal equipment (TE), and are not
synchronized to the network. ISDN TE without access to a
network connection (BRI lines) has limited or no
functionality.

If your system has both a BRI and a DTI card configured as
PRI installed, it is recommended that you use PRI as the
primary clock source, see DTI card configured as a PRI card
on page 64.

Other ISDN BRI equipment: NT1

The NT1 (network termination type 1) connects an S interface
(four-wire) to a U interface (two-wire). In most cases, it
connects loops from a BRI-ST card to the network connection,
which uses the U interface. It can also connect S interface
terminal equipment (TE) to the U loop from a BRI-U2 or
BRI-U4 Card.

An NT1 is not required to connect from the network to BRI-U
cards or to connect U interface TE to an ICS equipped with
BRI-U cards.

The NT1 converts and reformats data so it can be transmitted
to and from the S or T connection. In addition, it manages the
maintenance messages travelling between the network and the
NT1, and between the NT1 and the ICS.

The NT1 from Nortel Networks is packaged two ways:

• as a stand alone package, which contains one NT1 card
(NTBX80XX) and a power supply (NTBX81XX)

• as a modular package, which contains up to 12 NT1 cards
(NTBX83XX) and a power supply (NTBX86AA)

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ISDN standards compatibility

Norstar ISDN equipment supports National ISDN standards
for basic call and calling line identification services.

Norstar BRI is compliant with National-1 and PRI is
compliant with National-2.

Modular ICS does not support EKTS (Electronic Key
Telephone System) or CACH (Call Appearance Call
Handling).

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N0130943 02 Modular ICS 7.1 Installer Guide

Working with ISDN

Planning your ISDN network

Consult ISDN hardware on page 64 and ISDN programming
on page 76 to determine a configuration of ISDN trunks and
terminal equipment (TE) for the Modular ICS, then order the
appropriate ISDN capability package from your ISDN service
provider.

For ISDN BRI service, your service provider supplies service
profile identifiers (SPIDs), network directory numbers
(Network DNs), terminal endpoint identifiers (TEIs), and
other information, as required, to program your Modular ICS,
TE, and other ISDN equipment.

Modular ICS does not support any package with EKTS
(Electronic Key Telephone System) or CACH (Call
Appearance Call Handling). EKTS is a package of features
provided by the service provider and may include features
such as Call Forwarding, Link, Three-Way Calling, and
Calling Party Identification.

Ordering ISDN PRI

When you order ISDN PRI, order two-way DID because it
simplifies provisioning and provides efficient use of the PRI
bandwidth.

Ordering ISDN PRI service in Canada

In Canada, order Megalink™ service, the trade name for
standard PRI service and set the Norstar equipment to the
supported protocol that is identified by your service provider,
either DMS-100 or NI-2.

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Ordering ISDN PRI service in United States

In the United States order PRI service from your service
provider. Set the Norstar equipment to the PRI protocol
provided by your service provider.

Ordering ISDN BRI

Ordering service in Canada

In Canada, order Microlink™ service, the trade name for
standard BRI service. You can order either regular
Microlink™ service, which includes the CLID (Calling Line
Identification) feature, or Centrex Microlink™, which
includes access to additional ISDN network features
(including Call Forwarding).

When ordering Microlink™ service, it must be ordered with
EKTS (Electronic Key Telephone System) turned off. If you
will be using a point-of-sale terminal adapter (POSTA), ask
for D-packet service to be enabled.

Ordering ISDN service in the U.S.

In the U.S., regardless of the CO (Central Office) type, order
National ISDN BRI-NI-1 with EKTS (Electronic Key
Telephone System) turned off. Use the following packages as
a guideline for ordering your National ISDN BRI-NI-1.

However we recommend using packages M or P with the
Modular ICS. Contact your service provider for more
information about the capability packages it offers.

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N0130943 02 Modular ICS 7.1 Installer Guide

Bellcore/National ISDN Users Forum (NIUF) ISDN packages
supported by Modular ICS (for ordering in U.S.)

If you want to transmit both voice and data, and support
D-channel packet service, order package P. However,
Modular ICS does not support the flexible calling for voice
and additional call offering features that are included in
package P.

Multi-Line Hunt may be ordered with your package. When a
telephone number (the Network DN) in the group of numbers
assigned by your service providers is busy, the Multi-Line
Hunt feature connects the call to another telephone number in
the group. Norstar supports the feature only on point-to-point,
network connections (T loop or U-NT loop). Check with your
service provider for more information about Multi-Line Hunt.

Any of the ISDN packages will allow you to use sub­addressing, but your ISDN TE must be equipped to use sub­addressing for the feature to work.

Capability Feature set Optional

features

Point-

of-

sale

Voice Data

M Alternate

voice/circuit­switched data
on both
B-channels

-- calling line
identification

--

√ √

P Alternate

voice/circuit­switched data
on both
B-channels

D-channel
packet

flexible
calling for
voice (not
supported by
Modular ICS)

Basic
D-Channel
Packet

additional
call offering
(not
supported by
Modular ICS)

calling line
identification

√ √ √

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Supported ISDN protocols

The switch used by your service provider must be running the
appropriate protocol software and the correct version of that
software to support ISDN PRI and ISDN BRI. Each protocol
is different and supports different services. Contact your
service provider to ensure that your ISDN connection has the
protocol you require.

For more information about the supported protocols and
services, refer to Call by Call service for PRI on page 472.

ISDN programming

Most of the configuration programming for PRI and BRI lines
and ISDN terminals and devices is done under Hardware.
This section gives you an overview of programming for PRI
and BRI lines, ISDN terminals and devices, and D-packet
service.

PRI or BRI programming activity Programming

heading

View or change the card configuration for each slot
in the ICS

Hardware

Provision or deprovision loops and lines Provisioning

Enable or disable BRI or DTI card (PRI) Module status

View status of line, loop or port Port/DN status

Enable/disable individual PRI channels Link Status

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Programming ISDN PRI resources

Some steps will not be necessary, depending on the service
you are providing.

More detailed information is included under the individual
headings and settings in the Programming and Maintenance
sections.

For complete card and cartridge installation instructions and
safety precautions, see Installation on page 227.

1. Collect the information supplied by your service provider
to support your ISDN package.

2. Ensure that a Combination Fiber 6-port Services
Cartridge, or a Services Cartridge has been installed in the
ICS.

3. Install the DTI cards in the ICS. Refer to Installing the
cartridges on page 231 for information about card
placement. If you are not using DTI cards, determine
which type of card you will preprogram the ICS to use in
each slot.

4. Disable each card under Maintenance.

5. Select a card type (PRI) in Hardware. See Provisioning
the DTI card for PRI on page 497, for information about
protocol and other settings you must configure.

Tips - For systems running 6.0 or greater software, a DTI

card can be installed off-core on Module 3 or 4 on the Midi
system, or module 7 or 8 on the Maxi system to expand the PRI
capability of your system. This card is only supported on
Profile 1 and 4.

Note: Legacy DTI cards cannot be used off-core. A new DTI
card was released in 2002 that can be used in any position.

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6. Re-enable the card in Maintenance.
If required, the card goes through a firmware download

process, which takes five to six minutes. During a
firmware download, the bottom LED on the DTI card
flashes.

Programming ISDN BRI resources

Some steps will not be necessary depending on the service you
are providing.

More detailed information is included under the individual
headings and settings in the Programming and Maintenance
sections.

For complete card and cartridge installation instructions and
safety precautions, see Installation on page 227.

1. Collect the information supplied by your service provider
to support your ISDN package. This includes network
service profile identifiers (SPIDs) and Network DNs. If
you are supporting a point-of-sale terminal adapter, you
also need one or more terminal endpoint identifiers (TEIs).

2. Make sure a Combination Fiber 6-port Services Cartridge,
or a Services Cartridge has been installed in the ICS.

3. Install the BRI card in the ICS, Trunk Module. Refer to
Installing the cartridges on page 231 for information about
BRI card placement. If you are not using a BRI card,
determine which type of card you will preprogram the ICS
to use in each slot.

Tips - If you are using one or more of the lines on this card

for MCDN private networking, this is where you specify that
protocol (SL-1).

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N0130943 02 Modular ICS 7.1 Installer Guide

4. Disable each card in Maintenance under Module
Status.

5. Under Hardware, select a card type: BRI-ST, BRI-U2,
BRI-U4.

6. Under Hardware, select the type for each loop:

• for a BRI card, select T or S if the card type is BRI-ST

• for a BRI-U2 or BRI-U4 card, select LT or NT

7. If the card uses a T or NT loop, enter the following
information, as supplied by your service provider:

• the SPID assigned to the loop

• the number of B-channels associated with each SPID

• the Network DNs used with the network SPID

• the call type of the Network DN

Repeat the programming for the second network SPID, if
any.

If the T or NT loop is used for D-packet service:

• turn on the service

• assign the appropriate S-loop mapping for BRI-ST
cards or LT-loop mapping for BRI-U2 or U4 cards

• assign the TEIs to the loop. These are provided by the
telco to support a point-of-sale terminal adapter or
other D-packet service device.

If the loop type is S, select the sampling used on the loop.
If the loop type is S or LT:

• assign ISDN DNs to the loop

• designate one of the assi gned ISDN DNs to be the DN
for the loop (Loop DN).

Note: You can have a maximum of 30 ISDN DNs on your

system. The default ISDN DN range is 667-696 on

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Modular ICS 7.1 Installer Guide N0130943 02

systems upgraded from previous versions, and 699–
728 on new 7.1 systems, for a system with three-digit
DNs. You can also access the portable range of DNs
(638-666 on systems upgraded from previous versions,
and 669-698 on new 7.1 systems) if you need more
DNs than the ISDN range has available. To change
ISDN DN type, see Change DNs on page 430.

8. Re-enable the card in Maintenance. Refer to Disabling a
PRI Channel on page 565.

If required, the card goes through a firmware download
process, which takes five to six minutes. During a
firmware download, the bottom LED on the BRI card
flashes.

9. Provision the loops and lines, as appropriate, in
Maintenance. Refer to Provisioning BRI and PRI lines on
page 563.

10. If you are configuring auto-answer BRI trunks to map to
target lines, program the received number for the target
line to be the same as the Network DN supplied by your
service provider. This setting is found under Lines.

Assign the ISDN lines and target lines to the appropriate
ISDN DNs, which are the set of DNs reserved for use by
ISDN devices. This setting is found under
Terminals&Sets/Line access. ISDN lines can also be
assigned to the DNs used by the telephones or any other
devices connected to the Modular ICS.

Program the ISDN terminals and devices with the
appropriate ISDN DNs and terminal SPIDs by following
the instructions that come with the devices. For more
information, see Programming ISDN equipment on page

83.
If you are setting up a D-packet service, program the point-

of-sale terminal adapter or other D-packet service device

Working with ISDN / 81

N0130943 02 Modular ICS 7.1 Installer Guide

with the appropriate TEI (provided by your service
provider), terminal SPID, and DN by following the
instructions that come with the device.

Programming ISDN PRI lines

When the configuration programming under Hardware is
complete, your PRI lines are ready to be programmed. For
information about programming your PRI lines, see Call by
Call service for PRI on page 472.

Programming ISDN BRI lines

When the configuration programming under Hardware is
complete, your BRI lines are ready to be programmed in the
same way as analog lines. You can, for example, place them in
pools and assign them to system telephones, or ISDN terminal
equipment.

However, there are some differences in the way BRI lines
work that will influence how you configure them to handle
incoming and outgoing calls.

• For BRI lines, in most cases, your service provider
supplies two SPIDs – one for each B channel. Each SPID
and one or more Network DNs are associated with a single
line. Calls to a Network DN come in on a specific line.
Pressing a line button selects the same line every time.

• If your service provider supplies you with a single SPID
for both B channels, incoming and outgoing calls are
handled according to the loop. The two lines provided by
the BRI loop are pooled for both incoming and outgoing
calls.

For example, if Loop 201 is programmed with a single
SPID, which supports lines 001 and 002, incoming calls
made to a Network DN associated with the SPID appear on
either line 001 or line 002. If you press the line button for

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Modular ICS 7.1 Installer Guide N0130943 02

line 001, either line 001 or line 002 is selected. For loops
which use a single SPID, assign both lines on a loop to a
telephone to guarantee that all calls appear at the
telephone.

Programming Direct Inward System Access (DISA) on
PRI trunks

When a trunk cartridge is set to PRI, all lines on that trunk are
set to Auto Answer without Direct Inward System Access
(DISA).

DISA can be accessed by one of two methods.

1) Define the DISA DN to match the trailing digits of the
Called Party Number (CDN).

With Public, Private, and Tie service types, the CDN is
simply truncated to the Target Line Receive Digit Length
and is parsed to match the Target Line Receive Digits.
DISA can be accessed by having the DISA DN match the
trailing digits of the CDN. For example, with a Receive
Digit Length = 4, and DISA DN = 1234, a call made to
Public DN 763-1234 will be handled as follows:

• the ISDN setup message will contain a CDN of 763-1234

• the CDN will be truncated to the four digits, 1234

• 1234 matches the DISA DN

• the call will be answered with DISA

2) Use incoming Call by Call (CbC) Service routing to map the

call type to the DISA DN. Refer to Programming Call by
Call service selection on page 475 for more information.

With FX, INWATS, 900, and SDS service types, either a
Service Id (SID) or a CDN is mapped to Target Line
Receive Digits.

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N0130943 02 Modular ICS 7.1 Installer Guide

This is programmed under Call-by-Call Routing. DISA
may be accessed by having the SID or CDN map to the
DISA DN. This example has a Receive Digit Length = 4,
DISA DN = 1234, and CbC Routing with (Service Type =
FX, Map from SID = 2, Map to digits = 1234).

A call presented to the Norstar system with service type
FX and SID 2 will be handled as follows:

• The ISDN setup message will specify FX with SID = 2

• The FX SID = 2 will be mapped to DISA DN digits 1234
The call will be answered with DISA

Programming ISDN equipment

DTI cards configured as PRI support various applications that
are enabled by PRI. For a list of the type of applications that
are support, see ISDN applications on page 193.

Terminal equipment for BRI cards

ISDN devices and terminals connected to the ICS must be
configured under the Hardware heading in system
programming. You choose directory numbers for ISDN
equipment from a pre-determined range of DNs (667-696 on
systems upgraded from previous versions, and 699-728 on
new 7.1 systems). Any of the ISDN DNs can be assigned to
any U-LT or S loop, but each can only be assigned to one loop
and one device.

Devices on an S or LT loop (BRI cards only)

Terminal equipment using a U-LT loop or S loop must be
assigned an ISDN directory number (ISDN DN). This allows
the TE to be assigned lines and to communicate with other
devices connected to the ICS. Each DN can be assigned to only
one TE and one loop.

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You assign ISDN DNs to S loops and LT loops under Assign
DNs under Hardware. Each S or LT loop can be programmed

with eight ISDN DNs, but you cannot exceed a total of 30
ISDN DNs for the Modular ICS.

Once you have assigned ISDN DNs to a loop, designate one of
the DNs as a Loop DN. The Loop DN acts as a main ISDN DN
and completes the configuration of the loop.

The ISDN terminal equipment (TE) on the loop is also
programmed with its ISDN DN. See the instructions that come
with the ISDN device for information on how to program it to
recognize the assigned DN. Most devices will require both a
terminal service profile identifier (terminal SPID) and a DN,
and some will require two terminal SPIDs and two ISDN DNs.
The SPID used with the device should not be confused with a
SPID used for network connections using an T or NT loop.

To create a terminal SPID for a device, add at least two zeros
to the end of the ISDN DN. Add more zeros to the beginning
or end of the ISDN DN until you have the length of SPID
required by the TE. For example, if an ISDN telephone
requires a six-digit SPID and has a DN of 699, its SPID is

069900. If the same TE requires a minimum of 10 digits, the

SPID is 0000069900.
Most ISDN terminals require a five-digit SPID. An ISDN PC

card usually requires a 10-digit SPID. Follow the directions
that come with the ISDN device to program it with a SPID and
ISDN DN.

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N0130943 02 Modular ICS 7.1 Installer Guide

Adding zeroes to SPIDs

The following table uses the example in the illustration to
show the programming for the S loop.

Setting Option

Loop 201

Type S

Sampling Fixed

DNs on Loop 201:
Assign DNs

699: Assigned
700: Assigned
701: Assigned
702: Assigned

Loop DN 699

Ins

pect FO

R
W

AR

D
C

allers

Ins

pec

t F

OR

W
A

R

D
C

allers

M

X
P

M
XP

Inspe

ct FO

R
WA

R
D

C

allers

Insp

ect FO

R

WA

R
D

C

allers

M

X
P

M

X
P

U-LT

S

DN 275
SPID 0000027500

Loop DN 699

DN 701 (incoming)
SPID 0000070100
DN 702 (outgoing)
SPID 0000070200

DN 699
SPID 069900

Loop DN 701

DN 700
SPID 070000

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Modular ICS 7.1 Installer Guide N0130943 02

ISDN router

By connecting an ISDN router to your Modular ICS, a group
of PCs can share Internet access. This arrangement is best for
a workplace where each personal computer occasionally uses
an Internet connection.

To support Internet access, you must order BRI lines from
your service provider, and subscribe to an Internet service
from an Internet service provider (ISP). Your personal
computer must have an Internet browser and any applications
supplied by your ISP.

D-packet service (BRI cards only)

The D-packet service supplied by the Modular ICS supports a
point-of-sale terminal adapter (POSTA). Connecting a
POSTA allows transaction terminals, such as devices where
you swipe credit or debit cards, to transmit information using
the D channel of the BRI line. At the same time, the B channels
of the BRI line remain available for voice and data calls. A
special adapter links transaction equipment, such as cash
registers, credit card verification rigs, and point-of-sale
terminals, to the X.25 network. This is a data communications
network designed to transmit information in the form of small
data packets.

ISDN

ICS

U-LT loop

PCs with
applications

ISDN router

LAN

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To support the D-packet service, your ISDN network and
financial institution must be equipped with a D-packet
handler. To convert the protocol used by the transaction
equipment to the X.25 protocol, your ISDN network must also
be equipped with an integrated X.25 PAD.

X.25 PAD works with the following versions of X.25: Datapac
32011, CCITT, T3POS, ITT and API. The ISDN service
package you order must include D-packet service, for
example, Package P in the U.S. or Microlink™ with
D-channel in Canada.

Your service provider supplies a Terminal Endpoint Identifier
(TEI) and a DN to support D-packet service. The TEI is a
number between 00 and 63 in the U.S. In Canada, the default
range is 21-63. Your service provider may also supply you
with a DN to program your D-packet device. The DN for
D-packet service becomes part of the dialing string used by the
D-packet to call the packet handler.

POSTA for ISDN BRI

When you configure D-channel packet service, you are
specifying the transmission path between an ISDN loop on the
network side of the ICS and the ISDN loop on the telephone
side. The telephone side loop is the loop used by the point-of­sale terminal adapter. The service is turned on and configured
using the network loop programming found under Hardware.
Use NT loop for BRI-U2 and BRI-U4 cards and S or T loop
for BRI-ST cards.

To set up D-packet service:

• go to the programming settings for the network loop under
Hardware. (S, T, or NT loop)

• select the S loop or LT loop used by the POSTA

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Modular ICS 7.1 Installer Guide N0130943 02

• enter the terminal endpoint identifiers (TEIs) supplied by
your service provider

Point-of-sale terminal adapter

The point-of-sale terminal adapter is an analog device that
connects to point-of-sale devices using an RS-232 interface
and a U-LT loop. It handles the routing of packet information
from the devices to the ICS and into the ISDN network.

Your service provider, usually a financial institution, supplies
you with information about the compatible controller, which
handles the routing of packet information from the devices to
the ICS and into the ISDN network.

N0130943 02 Modular ICS 7.1 Installer Guide

Trunks and target lines

Trunks are external lines that provide the physical connection
between a Norstar system and other systems in a private or
public network. Trunks are numbered 001 to 156 in a fully
expanded system. Norstar Modular ICS supports six different
types of trunks:

• PRI trunks are used for incoming and outgoing calls over
an ISDN network. PRI SL-1 lines can provide MCDN
network functionality in a private network between other
Norstar systems, Meridian 1 systems, or Business
Communications Systems, if the appropriate software
code has been installed.

• T1 trunks are digital trunks that can be configured to act as
loop start, ground start, E&M, DID, or leased lines,
depending on your requirements.

— DID trunks route incoming calls from the public

network directly to telephones within Norstar, without
an attendant.

— Loop start trunks handle incoming and outgoing calls

between Norstar and the public network.

— E&M trunks handle incoming and outgoing traffic

between the Norstar system and the private network.

• BRI trunks handle incoming and outgoing calls between
Norstar and an ISDN network.

• Target lines are virtual communication paths between
trunks and telephones on the Norstar system. They are
incoming lines only, and cannot be selected for outgoing
calls. With 224 target lines in a fully expanded system, you
can concentrate auto answer calls on fewer trunks. This
type of concentration is an advantage of target lines.
Norstar mapping allows you to direct each target line to

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Modular ICS 7.1 Installer Guide N0130943 02

one or more telephones. Target lines are numbered 157 to
380 in a fully expanded system, and 157 to 284 in all
others.

Telephones can be configured to have an appearance of any
type of trunk and line, including target lines, but excluding PRI
trunks. If assigned, they are used for monitoring call usage.

Trunk operating modes (T1)

T1 trunks have four operating modes:

• ground start (T1 only)

• loopstart (analog and T1)

• E&M (analog and T1)

• DID (analog and T1)

Ground start trunks (T1 only)

Ground start trunks offer the same features as loop start trunks,
but are used when the local service provider does not support
disconnect supervision for the digital loop start trunks. Ground
start trunks work with T1 only.

By configuring lines as ground start, the system will be able to
recognize when a call is released at the far end.

Tips - You cannot change the trunk mode for a ground

start trunk on a DTI. It always has disconnect supervision.
A DTI can provide a maximum of 24 ground start trunks.

Analog ground start trunks are not supported.

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N0130943 02 Modular ICS 7.1 Installer Guide

DID trunks

DID trunks give you direct inward dialing (DID) from the
public network. A typical application of these trunks is to map
incoming digits onto target line appearances within the
Norstar system. DID trunks can operate only as auto-answer
trunks.

Targ et l ine s

204

205

206

207

208

209

Central office (CO)

Norstar

DID trunk

593-1234
593-1235
593-1236
593-1237
593-1238
593-1239

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When a call comes in on a DID trunk, the Norstar system
interprets the incoming digits in one of the following ways.

• If the digits map onto a target line, the call is routed to all
telephones with an appearance of that target line.

• If the digits map onto the DISA DN, the caller hears
stuttered dial tone. They must enter a six-digit Class of
Service (COS) password from a DTMF telephone to hear
system dial tone.

They can then enter a:
— target line number

— line pool access code
— remote feature code

• If the digits map onto the Auto DN, the caller hears system
dial tone. They can then enter:

— a target line number
— the DISA DN, which will prompt for a Class of Service

password
— a line pool access code
— a destination code
— a remote feature code from a DTMF telephone

Tips - Each DID Trunk Cartridge can provide four DID

trunks. Each DID Trunk Cartridge also has four DTMF
receivers dedicated to those trunks. A DTI can provide up to 24
DID trunks.

You cannot configure a DID trunk as the prime line for a
Norstar telephone or a Business Series Terminal.

The capabilities available to a remote caller are determined by
the remote filters and remote package assigned to a line, or by
the set restrictions, line restrictions and remote package
assigned to the Class of Service password.

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N0130943 02 Modular ICS 7.1 Installer Guide

Analog loop start trunks

Loop start trunks give you incoming and outgoing access to
the public network. Loop start trunks can be configured as
manual-answer or auto-answer. The answer mode determines
how the system handles incoming calls.

When a call comes in on a manual-answer loop start trunk, it
alerts at all telephones with that line appearance.

When a call comes in on an auto-answer loop start trunk that
is configured to answer with direct inward system access
(DISA), the caller hears a stuttered dial tone. They must enter
a six-digit Class of Service (COS) password from a DTMF
telephone to access system dial tone.

Once the caller has system dial tone, they can then enter:

• a target line number

• a line pool access code

• a remote feature code.
By default, auto answer loop start trunks are configured to

answer with DISA, and are used to provide controlled access
to Norstar system resources.

When a call comes in on an auto-answer loop start trunk that
is not configured to answer with DISA, the caller hears system
dial tone.

They can then enter:

• a target line number

• the DISA DN, which will prompt for a Class of Service
password

• a line pool access code

• a remote feature code from a DTMF telephone

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To place an outgoing call, a loop start line can be selected by:

• pressing a line button on the telephone

• dialing a line pool access code

• pressing a memory button that has been programmed with
a line pool access code

Configuration tips

• Loop start signaling is supported by Loop Start Trunk
Cartridges, Call Information (CI) Trunk Cartridges and
Digital Trunk Interfaces (DTI). Each Loop Start Trunk
Cartridge or CI Trunk Cartridge can provide four loop start
trunks. A DTI can provide up to 24 loop start trunks. If you
wish to configure your loop start trunks as auto-answer,
the trunks must have disconnect supervision.

• For Loop Start or CI Trunk Cartridges installed in a Trunk
Module, you will also need one E&M/DISA Trunk
Cartridge for every two loop start trunks that you configure
as auto-answer. The E&M/DISA Trunk Cartridge provides
two DTMF receivers to receive the incoming digits from
the central office. An auto-answer loop start trunk can give
you the same kind of direct inward dialing function as a
DID trunk.

• If your system includes both loop start trunks and DID
trunks, you would typically use loop start trunks for
outgoing calls and DID trunks for incoming calls.

• You may configure a loop start trunk as the prime line for
a Norstar telephone or a Business Series Terminal.

• The capabilities available to a remote caller are determined
by the remote filters and remote package assigned to a line,
or by the set restrictions, line restrictions, and remote
package assigned to the Class of Service password.

Trunks and target lines / 95

N0130943 02 Modular ICS 7.1 Installer Guide

• Two loopstart trunk cartridges are compatible with
Modular ICS 7.1. The NT5B40GA-93 can be installed in
trunk module (TM) slots only. The NT7B75GA-93 can be
installed in either core slots three or four, or TM slots one,
two, or three.

Analog E&M trunks

An Analog E&M trunk gives you incoming and outgoing
access to other systems in a private network. E&M trunks can
be configured as manual-answer or auto-answer. The answer
mode determines how the system handles incoming calls.

Key system

E&M

intelligent network

PABX

PBX

PBX

E&M

Key system

Norstar

Norstar

E&M

Private network

E&M/DISA

Trunk

Cartridges

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By default, auto-answer E&M trunks are answered by the
system with direct inward system access (DISA), and are used
to provide controlled access to Norstar system resources.

When a call comes in on a manual-answer E&M trunk, it alerts
at all telephones with that line appearance.

When a call comes in on an auto-answer E&M trunk that is
configured to answer with DISA, the caller hears stuttered dial
tone. They must enter a six-digit COS password from a DTMF
telephone to hear system dial tone.

They can then enter a:

• target line number

• line pool access code

• remote feature code
When a call comes in on an auto-answer E&M trunk that is not

configured to answer with DISA, the caller hears system dial
tone. At that point they can then enter one of the following:

• a target line number

• the DISA DN, which will prompt for a COS password

• a line pool access code or a destination code

• a remote feature code from a DTMF telephone
To place an outgoing call, an E&M trunk can be selected by

one of the following:

• pressing a line button on the telephone

• dialing a line pool access code or destination code

• pressing a memory button that has been programmed with
a line pool access code or destination code.

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N0130943 02 Modular ICS 7.1 Installer Guide

BRI trunks

BRI trunks give you incoming and outgoing access to an ISDN
network. Like loop start trunks, they can be configured as
manual-answer or auto-answer. See Ans mode on page 369.

BRI trunks provide a fast, accurate, and reliable means of
sending and receiving data, images, text, and voice
information. Using BRI lines allows for faster transmission
speeds and the addition of a variety of powerful business
applications, including remote LAN access, video
conferencing, file transfer and Internet access.

For more information, see Welcome to ISDN on page 53.
Note Profile 2: European BRI trunks can only be EURO

trunks.

PRI trunks

PRI trunks are used for incoming and outgoing calls over an
ISDN network. PRI trunks are automatically set to auto­answer.

Incoming calls are routed to system telephones through
assigned target lines. Outgoing calls are made using the
intercom key assigned to a PRI line pool, or by entering a
destination code to which a route has been defined using PRI
line pools. You cannot assign a PRI line directly to a
telephone.

PRI SL-1 lines also can provide MCDN network functionality
over a private network between other Norstar systems,
Meridian 1 systems, or Business Communications Systems, if
the appropriate keycode has been installed. Private networking
is described in Networking with Norstar on page 109.

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Target lines

A target line is an internal communication path that is reached
by means of digits received from an incoming trunk. Target
lines are assigned to answer direct-dial incoming calls but they
cannot be used to make outgoing calls.

You can program auto-answer trunks to map to target lines to
provide for attendant bypass, which allows the call to go
directly to a department or individual, and to create line
concentration, where one trunk can map onto several target
lines.

No target lines are automatically assigned to telephones,
except if the DID template has been applied to the system.

Target lines are configured using line numbers 157-380
(mega) or 157-284, in the same way as physical lines.

Privacy issue

You can set a target line to Private (default is
Public), however, such features as Call Pickup
can still answer these lines at other telephones in
the group.

N0130943 02 Modular ICS 7.1 Installer Guide

Remote system access

The remote access feature allows callers elsewhere on the
private or the public network to access a Norstar system by
dialing directly into the system without going through an
attendant. Once in the system, the remote user can use some of
the system resources. The remote access must be enabled in
programming before callers can use it.

Norstar systems support remote system access on the
following trunk types, which may require the remote caller to
enter a COS password for direct inward system access (DISA):

• auto-answer loop start trunks

• auto-answer E&M trunks

• DID trunks, by means of the DISA DN

• PRI trunks, by means of the DISA DN
The system resources, such as dialing capabilities, line pool

access and feature access, that a remote user may access
depends on the Class of Service (COS) assigned to the user.
See Class of Service on page 103, COS pswds on page 412 and
the Modular ICS 7.1 System Coordinator Guide for more
details.

Use system features during a remote call

To use features on a Norstar system during a remote call-in,
press •, followed by the feature code. Even if you are calling
from another Norstar system or from within a private network,
press • instead of ≤.

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Modular ICS 7.1 Installer Guide N0130943 02

Remote access on loop start and E&M trunks

Loop start trunks provide remote access to Norstar from the
public network. E&M trunks provide remote access from a
private network. Each must be configured to be auto-answer to
provide remote system access.

A loop start trunk must have disconnect supervision if it is to
operate in auto-answer mode. E&M trunks always operate in
disconnect supervised mode.

When a caller dials into the system on a line that has auto­answer, the system answers with system dial tone and no COS
password is required. In this case, control over the system
capabilities available to the caller is provided only by the
restriction filters assigned to the line.

When a caller dials in on a line that has auto-answer with
DISA, the system answers with stuttered dial tone. This is the
prompt to enter a COS password. The password used by the
caller determines which system capabilities are available to
the caller.

Remote access on a private network

Nodes on the private network deliver the last dialed digits to
the destination Norstar node, for interpretation by the
destination Norstar node. The destination Norstar node either
matches the digits to a target line or interprets the digits as a
remote feature request. The call is either routed to the specified
target line, or the remote feature is activated.

By default, E&M trunks are set to answer with DISA. For
auto-answer E&M trunks connected to a private network,
change the default so that the trunks are not answered with
DISA. If an auto-answer E&M trunk is configured to answer
with DISA, the system tries to interpret any received digits as
a COS password.