Nortel 1000 Con?guration guide User manual

Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563
.

Document status: Standard
Document version: 02.01
Document date: 21 December 2007
Copyright © 2007, Nortel Networks
All Rights Reserved.
Sourced in Canada
LEGAL NOTICE
While the information in this document is believed to be accurate and reliable, except as otherwise expressly agreed
to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF ANY
KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document are subject
to change without notice.
Nortel, the Nortel Logo, the Globemark, SL-1, Meridian 1, and Succession are trademarks of Nortel Networks.
All other trademarks are the property of their respective owners.

3
Contents
New in this Release 15
Other changes 15
How to Get Help 17
Getting help from the Nortel web site 17
Getting help over the telephone from a Nortel Solutions Center 17
Getting help from a specialist by using an Express Routing Code 17
Getting help through a Nortel distributor or re-seller 18
Overview of IP Trunk 3.01 19
Contents 19
Introduction 19
Startup and registration 23
IP Trunk 3.01 (and later) and CS 1000S/CS 1000M 25
Loss plans and pad values 27
Codec selection 27
IP Trunk 3.01 (and later) requirements 27
Package requirements 27
TM 3.1 28
Interoperability with the ITG 8-port trunk card 28
System description 29
Contents 29
IP Trunk 3.01 (and later) application 31
System requirements 32
Hardware components for IP Trunk 3.01 (and later) 33
Ordering rules and guidelines 36
Ordering rules for an IP Trunk 3.01 (and later) node 36
Ordering rules for IP Trunk 3.01 (and later) node expansion 37
Sparing ratios for IP Trunk 3.01 (and later) components 37
IP trunk card description 38
8051 XAController firmware 38
Card roles 39
Card combinations 43
Interactions among card functions 44
ITG-Pentium 24-port trunk card (NT0961AA) 46
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

4Contents
Description 46
Faceplate indicators, controls, and interfaces 47
Backplane interfaces 50
Assembly description 50
Media Card 32-port trunk card (NTVQ01BB) 51
Description 51
NTVQ01BB Hardware 52
Assembly description 53
Faceplate indicators and interfaces 53
Backplane interfaces 54
Installation guidelines 55
Software delivery 55
Replacing a CompactFlash PC Card (C:/ drive) 56
Software upgrade 59
Media Card application identification labels 60
Interoperability with earlier versions of ITG Trunk 60
Fax Tone Detection Configuration 61
ISDN Signaling Link 61
Inter-card signaling paths 64
Dialing plans 65
Multi-node configuration 65
North American dialing plan 66
Flexible Numbering Plan 67
Electronic Switched Network (ESN5) network signaling 67
Echo cancellation 67
Speech Activity Detection 69
DTMF Through Dial 69
Quality of Service 70
Quality of Service parameters 71
Network performance utilities 72
E-Model 73
Fallback to alternate facilities 74
Triggering fallback to alternate trunk facilities 74
Fallback in IP Trunk 3.01 (and later) 76
Return to the IP network 76
Type of Service 76
Fax support 78
Remote Access 79
Per-call statistics support using RADIUS Client 80
Configuration 81
Messaging 81
SNMP MIB 83
MIB-2 support 83
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

Contents 5
IP Trunk 3.01 (and later) SNMP agent 83
Codec profiles 84
G.711 84
G.729AB 85
G.729B 85
G.723.1 (5.3 kbit/s or 6.3 kbit/s) 85
Security passwords 86
Administrator level 86
Technical support level 86
ITG engineering guidelines 87
Contents 87
Introduction 89
Audience 90
Equipment requirements 90
Scope 92
Network engineering guidelines overview 92
IP Trunk 3.01 (and later) traffic engineering 95
Estimate voice traffic calculations 95
Calculate the number of IP Trunk 3.01 (and later) ports required 99
Calculate number of IP trunk cards required 101
Factors that effect the real-time capacity 104
Host module type 104
The number of ports configured on the Leader card, codec selection, and voice
sample size 104
Size of the IP Trunk 3.01 (and later) network 104
Endpoint type 105
The Average Hold Time (AHT) and distribution of incoming calls 105
Calculate Ethernet and WAN bandwidth usage 111
Silence Suppression engineering considerations 114
Fax engineering considerations 114
Trunk Anti-Tromboning (TAT) and Trunk Route Optimization (TRO)
considerations 115
WAN route bandwidth engineering 118
Assess WAN link resources 121
Link utilization 121
Estimate network loading caused by IP Trunk 3.01 (and later) traffic 122
Route Link Traffic Estimation 123
Enough capacity 125
Insufficient link capacity 126
Other intranet resource considerations 126
Implement QoS in IP networks 126
Traffic mix 127
TCP traffic behavior 127
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

6Contents
IP Trunk 3.01 (and later) DiffServ support for IP QoS 128
Queue management 129
Use of Frame Relay and ATM services 129
Internet Protocols and ports used by IP Trunk 3.01 (and later) 130
QoS fallback thresholds and IP Trunk 3.01 (and later) 131
Fine-tune network QoS 132
Components of delay 132
Reduce link delay 135
Reduce hop count 136
Adjust jitter buffer size 136
Reduce packet loss 136
Routing issues 137
Network modeling 137
Time-of-Day voice routing 138
Measure intranet QoS 139
QoS evaluation process overview 139
Set QoS expectations 139
Obtain QoS measurement tools 143
Measure end-to-end network delay 143
Measure end-to-end packet loss 145
Adjust PING measurements 145
Network delay and packet loss evaluation example 146
Other measurement considerations 147
Estimate voice quality 147
Does the intranet meet expected IP Trunk 3.01 (and later) QoS? 152
IP Trunk 3.01 (and later) LAN installation and configuration 152
Basic setup of the IP Trunk 3.01 (and later) system 152
IP trunk card connections 153
Configure a system with separate subnets for voice and management 153
Subnet configurations 154
Selecting public or private IP addresses 155
Single subnet option for voice and management 156
Multiple IP Trunk 3.01 (and later) nodes on the same ELAN and TLAN
segments 157
General LAN considerations 157
ELAN and TLAN network interface half- or full-duplex operation 157
TLAN subnet design 158
Configure the TLAN subnet IP router 158
Setting up the ELAN subnet 159
How to avoid system interruption 159
IP Trunk 3.01 (and later) DSP profile settings 161
Codec types 161
Payload size 162
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

Contents 7
Jitter buffer parameters (voice playout delay) 162
Silence Suppression parameters (Voice Activity Detection) 163
Fallback threshold 164
Setting the QoS threshold for fallback routing 164
Post-installation network measurements 164
Set ITG QoS objectives 165
Intranet QoS monitoring 166
SNMP network management 167
IP Trunk 3.01 (and later) network inventory and configuration 167
User feedback 168
TM 3.1 management and configuration of IP Trunk 3.01 (and
later) 169
Contents 169
Introduction 169
TM 3.1 ITG Engineering rules 169
TM 3.1 network setup guidelines 170
TM 3.1 remote access configuration 170
TM 3.1 PC description 172
TM 3.1 PC hardware and software requirements 173
Hard drive requirements 174
Install and configure IP Trunk 3.01 (and later) node 177
Contents 177
Introduction 179
Before you begin 180
Installation procedure summary 180
ESN installation summary 182
Create the IP Trunk 3.01 (and later) Installation Summary Sheet 183
Channel Identifier planning 184
Preferred ISL channel numbering 184
Incorrect ISL channel numbering plans 189
Install and cable IP Trunk 3.01 (and later) cards 190
Card installation procedure 190
Install NTCW84JA Large System I/O Panel 50-Pin filter adapter 193
Remove existing I/O panel filter adapter 194
Install NTMF94EA and NTCW84KA cables 195
Install the NTCW84KA cable (for DCHIP cards) 196
Install the NTMF94EA cable (for non-DCHIP cards) 197
Install shielded TLAN network interface cable 198
Install shielded ELAN network interface cable 199
D-channel cabling for the NT0961AA ITG-Pentium 24-Port trunk card 199
Required cables and filters for Large Systems 199
Configure NT6D80 MSDL switches 199
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

8Contents
Install filter and NTND26 cable (for MSDL and DCHIP cards in same Large System
equipment row) 200
Install filter and NTND26 cable (for MSDL and DCHIP cards in different Large
System equipment rows) 202
Small System cable installation 203
Install the serial cable 204
Cabling for the Media Card 32-port trunk card 205
ELAN and TLAN network interfaces 205
ITG Card ELAN/TLAN Adapter (L-adapter) 207
RS-232 maintenance port 211
NTMF29BA DCHIP cable 212
DCHIP cable routing, Large Systems 213
DCHIP Cable Routing
Meridian 1 Option 11C Cabinet/CS 1000M Cabinet 215
Other components 216
Media Card 32-port trunk card modem connection 217
Configure IP Trunk 3.01 (and later) data 218
Configure the ISL D-channel on the system for the DCHIP card for IP Trunk
3.01 (and later) 218
Configure the ISL D-channel on the Meridian 1/CS 1000M for the DCHIP card
for IP Trunk 3.01 (and later) 221
Configure ISDN feature in Customer Data Block 222
Configure IP Trunk 3.01 (and later) TIE trunk routes 223
Configure Media Card 32-port and ITG-Pentium 24-port trunk cards and units for
IP Trunk Route 227
Configure dialing plans within the corporate network 230
Make the IP Trunk 3.01 (and later) the first-choice, least-cost entry in the Route
List Block 230
Turn on Step Back on Congestion for the IP Trunk 3.0 (and later) trunk route 230
Turn off IP Trunk 3.01 (and later) route during peak traffic periods on the IP data
network 230
ESN5 network signaling 231
Disable the Media Card 32-port and ITG-Pentium 24-port trunk cards 235
Configure IP Trunk 3.01 (and later) data in TM 3.1 236
Add an IP Trunk 3.01 (and later) node in TM 3.1 manually 236
Add an IP Trunk 3.01 (and later) node and configure general node
properties 237
Single vs. separate TLAN and ELAN subnets 238
Configure Network Connections 239
Configure card properties 240
Configure DSP profiles for the IP Trunk 3.01 (and later) node 244
Configure SNMP Traps/Routing and IP addresses tab 247
Configure Accounting server 250
Control node access with SNMP community name strings 251
Exit node property configuration session 252
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

Contents 9
Create the IP Trunk 3.01 (and later) node dialing plan using TM 3.1 253
Retrieve the IP Trunk 3.01 (and later) node dialing plan using TM 3.1 258
Transmit IP trunk card configuration data from TM 3.1 to the IP trunk cards 260
Before configuration data is transmitted 260
Configure the Leader 0 IP address 260
Backup Leader installation for IP Trunk 3.01 (and later) 262
Transmit the node properties, card properties and dialing plan to Leader 0 264
Verify installation and configuration 266
Observe IP Trunk 3.01 (and later) status in TM 3.1 266
Transmit card properties and dialing plan to Leader 1 and Follower cards 268
Configure date and time for the IP Trunk 3.01 (and later) node 269
Change the default ITG shell password to maintain access security 270
Change default ESN5 prefix for non-ESN5 IP telephony gateways 271
Check and download IP trunk card software in TM 3.1 272
Transmit new software to the IP trunk cards 274
Upgrade the DCHIP PC Card 276
Configure TM 3.1 Alarm Management to receive SNMP traps from the IP trunk
cards 277
Make test calls to the remote nodes (ITG Trunk or IP Trunk) 280
Provisioning IP Trunk 3.01 (and later) in TM 3.1 281
Contents 281
Overview 281
Add a site and system 282
Add a site 282
Change an existing site 284
Delete a site 286
Add a system 289
Delete a system 299
Add an IP Trunk 3.01 (and later) node 301
Edit a node 311
Delete a node 316
Define the dialing plan information 318
Non-Gatekeeper-resolved (local) dialing plan 319
Gatekeeper-resolved endpoints 334
TM 3.1 OA and M using TM 3.1 applications 343
Contents 343
Introduction 344
TM 3.1 OA and M procedure summary 344
Delete a node 345
Delete an IP trunk card 345
Database locking 346
ITG Card Properties window 347
ITG Card Properties Maintenance window 347
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

10 Contents
ITG Card Properties Configuration window 349
DSP maintenance window 349
D-channel maintenance 350
Transmit configuration data 350
Add an IP Trunk 3.01 (and later) node on TM 3.1 by retrieving an existing node 353
Retrieve and add an IP Trunk 3.01 (and later) node for administration
purposes 353
Retrieve and add an IP Trunk 3.01 (and later) node for maintenance and diagnostic
purposes 355
Configuration audit 356
Retrieve IP Trunk 3.01 (and later) configuration information from the IP Trunk
3.0 (and later) node 357
Schedule and generate and view IP Trunk 3.01 (and later) OM reports 358
System commands LD 32 362
Disable the indicated IP trunk card 363
Disable the indicated IP trunk card when idle 363
Enable an indicated IP trunk card 364
Disable an indicated IP trunk card port 364
Enable an indicated IP trunk card port 364
Display IP trunk card ID information 364
Display IP trunk card status 364
Display IP trunk card port status 364
OA and M using the ITG shell CLI and overlays 367
Contents 367
Introduction 368
ITG Shell OA and M procedure summary 368
Access the ITG shell through a maintenance port or Telnet 368
Connect a PC to the card maintenance port 369
Telnet to an IP trunk card through the TM 3.1 PC 370
Change the default ITG shell password to maintain access security 371
Reset the default ITG shell password 372
Download the ITG operational measurements through the ITG shell 374
Reset the operational measurements 375
Display the number of DSPs 375
Display IP Trunk 3.01 (and later) node Properties 375
Display IP Trunk 3.01 (and later) Gatekeeper status 376
Transfer files through the Command Line Interface 377
Upgrade IP trunk card software using FTP 379
Backup and restore from the CLI 382
Recover the SNMP community names 383
IP Trunk 3.01 (and later) configuration commands 384
Download the IP Trunk 3.01 (and later) error log 384
System commands LD 32 384
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

Contents 11
Disable the indicated IP trunk card 386
Disable the indicated IP trunk card when idle 386
Enable an indicated IP trunk card 386
Disable an indicated IP trunk card port 386
Enable an indicated IP trunk card port 387
Display IP trunk card ID information 387
Display IP trunk card status 387
Display IP trunk card port status 387
Maintenance 389
Contents 389
Introduction 390
IP Trunk 3.01 (and later) IP trunk card alarms 391
System level maintenance 396
Access the IP trunk card 396
IP trunk card LD commands 396
TM 3.1 maintenance commands 398
Multi-purpose Serial Data Link (MSDL) commands 398
Simple Network Management Protocol (SNMP) 399
TRACE and ALARM/LOG 400
ITG shell command set 400
IP trunk card self-tests 407
Card LAN 408
BIOS self-test 408
Base code self-test 409
Field-Programmable Gate Array (FPGA) testing 409
Outgoing calls attempted/completed mismatch 409
IP Trunk 3.01 (and later) upgrades 410
Application upgrade 410
Maintenance or bug fix upgrade 410
Patching tool 410
Flash storage upgrades 414
Software upgrade mechanisms 414
Replace an IP trunk card 416
Determine IP trunk card software release 419
Transmit card properties and dialing plan 419
Backup and restore procedures 420
IP trunk card 420
TM 3.1 420
Command Line Interface 420
Fault clearance procedures 421
DSP failure 421
Card failure 421
DCH failure 422
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

12 Contents
Media Card 32-port trunk card faceplate maintenance display codes 423
ITG-Pentium 24-port trunk card faceplate maintenance display codes 425
System performance under heavy load 428
Message: PRI241 428
Message: MSDL0304 429
Message: BUG4005 429
Message: BUG085 430
Appendix A Patches and advisements 431
Contents 431
Introduction 431
IP Trunk 3.00.53 patches 431
MPLR17662 431
MPLR17346 431
IP Trunk 3.01.22 patches 432
MPLR18142 432
MPLR18157 432
Interoperability with IP Trunk 3.01 (MPLR17662 patch) 432
Appendix B Cable description and NT8D81BA cable
replacement 435
Contents 435
Introduction 435
NTMF94EA ELAN, TLAN and Serial Port cable 436
NTCW84KA ELAN, TLAN, DCH and serial cable 437
NTAG81CA Faceplate Maintenance cable 439
NTAG81BA Maintenance Extender cable 440
NTCW84EA DCH PC Card pigtail cable 441
NTMF04BA MSDL extension cable 443
NTCW84LA and NTCW84MA upgrade cables 444
Prevent ground loops on connection to external customer LAN equipment 446
Replace cable NT8D81BA with NT8D81AA 447
Tools list 449
Remove the NT8D81BA cable 449
Install NTCW84JA filter and NT8D81AA cable 449
Appendix C Environmental and electrical regulatory data 451
Contents 451
Environmental specifications 451
Mechanical conditions 452
Electrical regulatory standards 452
Safety 452
Electromagnetic Compatibility (EMC) 453
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

Contents 13
Appendix D Subnet mask conversion from CIDR to dotted
decimal format 457
Appendix E CLI commands 459
Appendix F Configure a Netgear RM356 modem router for
remote access 461
Contents 461
Introduction 461
Security features of the RM356 modem router 462
Install the RM356 modem router 462
Configure the TM 3.1 PC to communicate with a remote system site through a
modem router 463
Configure the RM356 modem router through the manager menu 463
RM356 modem router manager menu (application notes on the ELAN subnet
installation) 467
Appendix G Upgrade an ITG Trunk 1.0 node to support ISDN
signaling trunks 473
Contents 473
Upgrade procedure summary 474
Before you begin 474
Install the DCHIP hardware upgrade kit 476
Install the DCHIP I/O Panel breakout cable from the upgrade kit 477
Upgrade the ITG 8-port trunk card ITG basic trunk software to ITG/ISL trunk
software 478
Step 1 - Remove ITG Trunk 1.0 configuration files 478
Step 2 - Transmit ITG Trunk 2.0 software to the ITG 8-port trunk cards 480
Remove ITG Trunk 1.0 configuration data from Meridian 1 482
Configure the Meridian 1 ITG/ISL trunk data 483
Upgrade considerations 483
Verify ROM-BIOS version 485
Upgrade Troubleshooting 485
TM 3.1 cannot refresh view (card not responding) 485
How to upgrade software using the ITG shell 485
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

14 Contents
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

15
New in this Release
There have been no updates to the document in this release.
Other changes
Revision History
December 2007 Standard 02.01. This document has been up-issued to support
Communication Server Release 5.5.
May 2007 Standard 01.01. This document is issued to support
Communication Server 1000 Release 5.0. This document
contains information previously contained in the following legacy
document, now retired: (IP Trunk 553-3001-363).
August 2005 Standard 3.00. This document is up-issued for Communication
Server 1000 Release 4.5.
September 2004 Standard 2.00. This document is up-issued for Communication
Server 1000 Release 4.0.
October 2003 Standard 1.00. This document is a new NTP for Succession 3.0.
It was created to support a restructuring of the Documentation
Library. This document contains information previously
contained in the following legacy document, now retired: IP
Trunk: Description, Installation, and Operation (553-3001-202).
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

16 New in this Release
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

17
How to Get Help
This chapter explains how to get help for Nortel products and services.
Getting help from the Nortel web site
The best way to get technical support for Nortel products is from the Nortel
Technical Support web site:
http://www.nortel.com/support
This site provides quick access to software, documentation, bulletins, and
tools to address issues with Nortel products. From this site, you can:
•download software, documentation, and product bulletins
•search the Technical Support Web site and the Nortel Knowledge Base
for answers to technical issues
•sign up for automatic notification of new software and documentation
for Nortel equipment
•open and manage technical support cases
Getting help over the telephone from a Nortel Solutions Center
If you do not find the information you require on the Nortel Technical Support
web site, and you have a Nortel support contract, you can also get help over
the telephone from a Nortel Solutions Center.
In North America, call 1-800-4NORTEL (1-800-466-7835).
Outside North America, go to the following web site to obtain the telephone
number for your region:
http://www.nortel.com/callus
Getting help from a specialist by using an Express Routing Code
To access some Nortel Technical Solutions Centers, you can use an Express
Routing Code (ERC) to quickly route your call to a specialist in your Nortel
product or service. To locate the ERC for your product or service, go to:
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

18 How to Get Help
http://www.nortel.com/erc
Getting help through a Nortel distributor or re-seller
If you purchased a service contract for your Nortel product from a distributor
or authorized re-seller, contact the technical support staff for that distributor
or re-seller.
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

19
Overview of IP Trunk 3.01
Contents This section contains information on the following topics:
"Introduction" (page 19)
"Startup and registration" (page 23)
"IP Trunk 3.01 (and later) and CS 1000S/CS 1000M" (page 25)
"Codec selection" (page 27)
"IP Trunk 3.01 (and later) requirements" (page 27)
"Package requirements" (page 27)
"TM 3.1" (page 28)
"Interoperability with the ITG 8-port trunk card" (page 28)
IntroductionThe IP Trunk 3.01 (and later) software application is an Internet Telephony
Gateway (ITG) trunk software application that maintains the functionality of
ITG Trunk 2.x using Integrated Services Digital Network (ISDN).
IP Trunk 3.01 (and later) allows networks with Meridian 1 IP-enabled
systems to add a CS 1000 system to the existing IP Telephony network.
This increases the range of system options to provide enterprise-wide
telephony services.
IP Trunk 3.01 (and later) provides call-routing flexibility and survivability.
Even with a Signaling Server acting as a centralized authority for routing
IP Telephone calls, IP Trunk can make some call-routing decisions locally.
This can be done for one of the following reasons:
•It can maintain at least a minimum level of service in the unlikely event
that all Signaling Servers on the network are unreachable.
•It can maintain the existing functionality within a pre-existing ITG Trunk
network that was upgraded to IP Trunk 3.01 (and later).
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.

20 Overview of IP Trunk 3.01
In addition to routing IP Telephony calls with locally configured call-routing
options, IP Trunk 3.01 takes advantage of the centralized IP Telephony call
routing of an H.323 Gatekeeper residing on a Signaling Server elsewhere
on the network.
The H.323 Gatekeeper allows or denies access to IP network gateways. It
also provides address analysis to find the destination gateway or device.
A gateway is a device that translates circuit-switched signaling into H.323
signaling and translates circuit-switched bit stream user data into packetized
user data to enable the data to be delivered across an IP network. IP Trunk
3.01 (and later) provides IP access between the Meridian 1/CS 1000M
system and the IP network carrying voice traffic.
IP Trunk 3.01 (and later) interworks with ITG Trunk 2.x, but not with ITG
Trunk 1.0. For ITG Trunk 1.0 to interwork with IP Trunk 3.01 (and later),
upgrade ITG Trunk 1.0 to ITG Trunk 2.0. See Appendix "Upgrade an ITG
Trunk 1.0 node to support ISDN signaling trunks" (page 473).
IP Trunk 3.01 (and later) interworks with a CS 1000M system, which fulfils
the role of a Gatekeeper. The Gatekeeper uses directly-routed calls. See
"Directly-routed calls" (page 22). Using H.323 Registration and Admission
Signaling (RAS), IP Trunk 3.01 (and later) registers with the Gatekeeper,
if provisioned to do so. IP Trunk 3.01 (and later) then processes calls by
scanning its directory number information and routes unresolved calls to
the Gatekeeper.
For a Meridian 1 system to interwork with a CS 1000M system, the following
requirements must be met:
•The ITG-Pentium 24-port trunk card and the Media Card 32-port trunk
card must be upgraded to IP Trunk 3.01 (and later) software. This
upgrade supports MCDN features and Gatekeeper registration. As well
as this document, see Telephony Manager 3.1 System Administration
(NN43050-601) for more information on installing, upgrading, and
upgrading IP Trunk 3.01 (and later) parameters.
•The IP Trunk 3.01 (and later) node must be configured to register with
the CS 1000M Gatekeeper. Refer to "Gatekeeper-resolved endpoints"
(page 334) and to Telephony Manager 3.1 System Administration
(NN43050-601) for more information on how to configure the IP Trunk
3.01 (and later) options.
IP Trunk 3.01 (and later) is subordinate to the Gatekeeper for all calls that
require Gatekeeper intervention. This means that the IP Trunk 3.01 (and
later) node performs the following actions:
•registers with the Gatekeeper
•requests admission
•accepts the reply
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright © 2007, Nortel Networks
.