Nortel Meridian Meridian 1 Operating and installation instructions

ITG Line 1.0/IP Telecommuter Description, Installation and Operation
Meridian 1
Meridian Internet Telephony Gateway
(ITG) Line 1.0/IP Telecommuter
Description, Installation and Operation
Document Number: 553-3001-119
Document Release: Standard 2.00
Date: April 2000
Year Publish FCC TM
Copyright © 1999–2000 Nortel Networks
All Rights Reserved
Printed in Canada
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 limits of a Class A digital device pursuant to Part 15 of the FCC rules and the radio
interference regulations of Industry Canada. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at their own expense.
SL-1 and Meridian 1 are trademarks of Nortel Networks.

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ITG Line 1.0/IP Telecommuter Description, Installation and Operation
4
5HYLVLRQ#KLVWRU\
$SULO#5333 Standard 2.00. This is a global document and is up-issued for X11 Release
25.0x. Document changes include removal of: redundant content; references
to equipment types except Options 11C, 51C, 61C, and 81C; and references
to previous software releases.
-XQH#4<<< Standard, release 1.00.

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553-3001-119 Standard 2.00 April 2000

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ITG Line 1.0/IP Telecommuter Description, Installation and Operation
12
Contents
About this document . . . . . . . . . . . . . . . . . . . . . . . 13
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts of the IP Telecommuter system . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
IP Line card Gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
IP Line card Gatekeepers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Meridian 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
IP Telecommuter multi-zone architecture . . . . . . . . . . . . . . . . . . . . . . 22
Applicable systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
List of IP Telecommuter components . . . . . . . . . . . . . . . . . . . . . . . . . 25
IP Line card functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Card Roles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Gatekeeper role . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
IP Address Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Administration and Management . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Operational Measurements (OM) . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Non-Standard Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Password Changing and Authentication . . . . . . . . . . . . . . . . . . . . . 33
Basic call setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
IP Line card physical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Physical assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
OA&M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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553-3001-119 Standard 2.00 April 2000
MAT "ITG M1 IP Lines" application . . . . . . . . . . . . . . . . . . . . . . . 39
ITG shell command-line interface . . . . . . . . . . . . . . . . . . . . . . . . . 40
Meridian 1 system management commands. . . . . . . . . . . . . . . . . . 41
IP Telecommuter Engineering Guidelines . . . . . . 43
EMC compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
ITG Line card and Trunk card provisioning
rules for EMC compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
ITG I/O cabling for EMC compliance . . . . . . . . . . . . . . . . . . . . . . . . . 43
NT8R17AB IP Line card cable description . . . . . . . . . . . . . . . . . . 44
Shielded Category 5 cable for external IP Line card
LAN connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
NTMF94DA cable pin description . . . . . . . . . . . . . . . . . . . . . . . . . 47
Network engineering overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Setting up a system with separate subnets for voice
and management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Single subnet option for voice and management . . . . . . . . . . . . . . 54
LAN traffic engineering with RAS on T-LAN . . . . . . . . . . . . . . . . . . 54
LAN and WAN traffic engineering with distributed RAS
and clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Resource impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Ethernet and WAN bandwidth calculation . . . . . . . . . . . . . . . . . . . 54
Input/Output of Traffic Engineering . . . . . . . . . . . . . . . . . . . . . . . . 56
ITG Engineering Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Performance Evaluation and Enhancement . . . . . . . . . . . . . . . . . . . . . 59
Assessing WAN link resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Link utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Estimating network loading due to IP Telecommuter traffic . . . . . 60
Remote Access Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Decision: Sufficient capacity? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Insufficient link capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Quality of Service (QoS) Determination . . . . . . . . . . . . . . . . . . . . . . . 63
QoS Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Destination Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Measuring end-to-end network delay . . . . . . . . . . . . . . . . . . . . . . . 65

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ITG Line 1.0/IP Telecommuter Description, Installation and Operation
Measuring end-to-end packet loss . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Recording routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Adjusting ping measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Late packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Network Fine-tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Reducing delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Reducing hop count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Reducing packet errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Adjusting jitter buffer size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Implementing QoS in IP networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Traffic mix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
TCP traffic behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Post-installation network measurements . . . . . . . . . . . . . . . . . . . . . . . 77
Intranet QoS monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Estimating QoS level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Internet protocols and ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
ITG Management Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
ITG H.323 Voice Gateway Protocols . . . . . . . . . . . . . . . . . . . . . . . 83
IP Telecommuter Client . . . . . . . . . . . . . . . . . . . . . 85
Network organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
IP Telecommuter Client with USB set . . . . . . . . . . . . . . . . . . . . . . 85
IP Telecommuter without USB set . . . . . . . . . . . . . . . . . . . . . . . . . 86
Use of sound cards and headsets . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Use of WinModem and SoftModems . . . . . . . . . . . . . . . . . . . . . . . 87
Feature summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Voice calling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Set features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Voice mail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Called/Calling Party Name Display . . . . . . . . . . . . . . . . . . . . . . . . 87
Voice compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Address translation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Client documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

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User Interface description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Installation and configuration . . . . . . . . . . . . . . . . 91
Installation summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Create the IP Line card Installation Summary Sheet . . . . . . . . . . . . . . 93
Add an ITG node on MAT manually . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Configure the node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Add IP Line cards to the node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Install the IP Line cards in the Meridian 1 . . . . . . . . . . . . . . . . . . . . . . 101
Physical placement of the cards . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Install IP Line card NTMF94DA cable . . . . . . . . . . . . . . . . . . . . . . 103
Install the NTAG81CA serial cable . . . . . . . . . . . . . . . . . . . . . . . . 104
Add IP Line card configuration data in Meridian 1 . . . . . . . . . . . . . . . 106
IP Line card configuration guidelines . . . . . . . . . . . . . . . . . . . . . . . 106
Transmit ITG configuration information from MAT . . . . . . . . . . . . . 108
Set the Leader 0 IP address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Configure the Gatekeeper Properties . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Transmit node properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Configure the properties of each IP Line card . . . . . . . . . . . . . . . . 113
Configure IP Line card DSP properties . . . . . . . . . . . . . . . . . . . . . 120
Transmit card properties and Gatekeeper properties . . . . . . . . . . . 122
Verifying card software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Upgrading IP Line card software (if required) . . . . . . . . . . . . . . . . 127
Activate SNMP traps for IP Line cards . . . . . . . . . . . . . . . . . . . . . . . . 131
Enable the IP Line cards via overlay 32 on Meridian 1 . . . . . . . . . . . . 135
Make test calls to and from IP Telecommuter clients . . . . . . . . . . . . . 135
Add an ITG node on MAT by retrieving an existing node . . . . . . . . . 136
Configuring the node and Leader 0 . . . . . . . . . . . . . . . . . . . . . . . . . 137
Add the remaining IP Line cards to the node . . . . . . . . . . . . . . . . . 139
Add a “dummy” node to retrieve and view ITG node configuration . 139
Retrieve ITG configuration information from the ITG node . . . . . 140
Configure a modem router on the E-LAN for remote
access to the ITG node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Security features of the RM356 modem router: . . . . . . . . . . . . . . . 142

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ITG Line 1.0/IP Telecommuter Description, Installation and Operation
Physical installation of the RM356 modem router . . . . . . . . . . . . . 143
Configure the RM356 modem router by the manager menu . . . . . . 144
RM356 modem router manager menu
(application notes on Meridian 1 E-LAN installation) . . . . . . . . . . 148
Administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Basic interface of common MAT ITG windows . . . . . . . . . . . . . . . . . 158
“IP Telephony Gateway - IP Telcommuter”
window column definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Changing the SNMP Community Names to maintain
access security in MAT ITG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
ITG MAT OA&M tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Changing the IP Telecommuter password and
transmitting a new Gatekeeper Properties file . . . . . . . . . . . . . . . . . . . 166
ITG operational measurement (OM) report
scheduling and generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Viewing the ITG info and error log through the
MAT ITG application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Backing up and restoring MAT ITG data . . . . . . . . . . . . . . . . . . . . 171
Updating ITG node properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Adding an IP Line card to the node . . . . . . . . . . . . . . . . . . . . . . . . . 172
Deleting an IP Line card from the node . . . . . . . . . . . . . . . . . . . . . 182
Changing an IP address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Update IP Line card properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Update IP Line card DSP properties . . . . . . . . . . . . . . . . . . . . . . . . 188
Delete an ITG node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Displaying ITG node properties . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Displaying IP Line card properties . . . . . . . . . . . . . . . . . . . . . . . . . 192
Opening an Operational Measurement (OM) report . . . . . . . . . . . . 193
Use the Retrieve command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
ITG shell command-line interface access via
Telnet or maintenance port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Telnet to an IP Line card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Telnet and FTP Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

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Download the ITG operational measurements through
the ITG shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Reset the operational measurements . . . . . . . . . . . . . . . . . . . . . . . . 197
Display the number of DSPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Display ITG Node Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Transfer files via the command-line interface . . . . . . . . . . . . . . . . 198
IP configuration commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Download the ITG error log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Display the Gatekeeper Properties . . . . . . . . . . . . . . . . . . . . . . . . . 201
Meridian 1 system commands - LD 32 . . . . . . . . . . . . . . . . . . . . . . . . 201
Disable the specified IP Line card . . . . . . . . . . . . . . . . . . . . . . . . . 203
Disable the specified IP Line card when idle . . . . . . . . . . . . . . . . . 203
Disable a specified ITG port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Enable a specified IP Line card . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Enable a specified ITG port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Display IP Line card ID information . . . . . . . . . . . . . . . . . . . . . . . 204
Display IP Line card status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Display IP Line card port status . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Faceplate maintenance display codes for card reset . . . . . . . . . . . . . . 208
System error messages (alarms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Replacing an IP Line card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Meridian 1 system level maintenance of the IP Line card . . . . . . . . . . 222
ITG shell commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
IP Line card selftests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Troubleshooting a software load failure . . . . . . . . . . . . . . . . . . . . . . . 241
Warm rebooting the IP Line card . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Testing the IP Line card DSPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Working with alarm and log files . . . . . . . . . . . . . . . . . . . . . . . . . . 245
I/O, maintenance and extender cable description 247
NTMF94DA I/O cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

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ITG Line 1.0/IP Telecommuter Description, Installation and Operation
Prevent ground loops on connection to external
customer LAN equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
NTAG81CA maintenance cable description . . . . . . . . . . . . . . . . . . . . 250
NTAG81BA Maintenance Extender Cable . . . . . . . . . . . . . . . . . . . . . 251
Product integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Mean time between failures (MTBF) . . . . . . . . . . . . . . . . . . . . . . . 253
Environment specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Temperature-related conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Electrical regulatory standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Subnet mask conversion
from CIDR to dotted
decimal format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

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Page 13 of 262
ITG Line 1.0/IP Telecommuter Description, Installation and Operation
14
About this document
This document is a global document. Contact your system supplier or your
Nortel Networks representative to verify that the hardware and software
described is supported in your area.
This document provides information on the Meridian Internet IP
Telecommuter and IP Line card products.
This document contains the following sections:
'HVFULSWLRQ describes the IP Telecommuter and IP Line card functional
and physical characteristics.
,3#7HOHFRPPXWHU#&OLHQW describes the features and operation of the
H.323 desktop terminal, or client, used by IP Telecommuter.
(QJLQHHULQJ#*XLGHOLQHV describes requirements for the successful
integration of IP Telecommuter with the customer’s existing intranet.
,QVWDOODWLRQ#DQG#FRQILJXUDWLRQ describes the steps involved in installing
and configuring the IP Line card.
$GPLQLVWUDWLRQ describes the ITG Line card administration procedures
and parameter configuration.
0DLQWHQDQFH describes maintenance and report generating.
$SSHQGL[#$describes IP Line card cabling for CISPR Class A.
$SSHQGL[#%describes IP Line card cabling for CISPR Class B.
$SSHQGL[#&describes IP Line card product integrity.
$SSHQGL[#'describes how to convert subnet masks fromClassless Inter
Domain Routing (CIDR) to dotted-decimal format.

Page 14 of 262 About this document
553-3001-119 Standard 2.00 April 2000

Page 15 of 262
ITG Line 1.0/IP Telecommuter Description, Installation and Operation
42
Description
IP Telecommuter provides the communication between the circuit switched
telephony network and the H.323 IP Telecommuter clients on a Corporate IP
networkintheEnterprise environment(see Figure 1 onpage 17).The IP Line
card Gateway(s) interact with the IP Line card Gatekeeper which controls
Client access, registration, and monitoring. Through the IP Line card, calls
between H.323 IP Telecommuter clients, and the telephone sets and trunks
behind the Meridian 1 in the enterprise network are supported.
In addition, a subset of the Meridian 1 set features, such as Conference,
Transfer, Hold and Message Waiting Notification are available to the H.323
IP clients, much like a regular digital set behind the Meridian 1.
Parts of the IP Telecommuter system
The following parts compose the IP Telecommuter system: Terminals (IP
Telecommuter Clients), IP Line card Gateways, IP Line card Gatekeepers,
the Meridian 1, and MAT.
Terminals
The IP Telecommuter Client is an H.323 application used with the IP Line
card.
During the installation of the IP Telecommuter Client, user DN, and
Gatekeeper IP address are entered. The DN is used to associate with a port on
the IP Line card. Aninitial password will be assigned by the technician during
the process of configuring the IP Line card in MAT. This password should be
changed by the end user when using the system for the first time.

Page 16 of 262 Description
553-3001-119 Standard 2.00 April 2000
The IP Telecommuter Client consists of a PC running Windows 98 with an
M9617 USB telephone connected as theprimary user interface. Theuser may
then either use the keys on the telephone or the Graphical User Interface
(GUI) on the PC to initiate calls and use set features. On a PC running
Windows 95/98/Windows NT 4.0 operating system, the IP Telecommuter
application may also be used while travelling by plugging a headset into the
sound card on the PC and using the GUI for call control.
See the IP Telecommuter Client section for a detailed description.
IP Line card Gateways
Gateways in the system contain two interfaces: one interface to the
Meridian 1, and the other is an H.323 interface to the IP network.
The Gateway provides the necessary conversion for both call signaling and
voice stream/packets across the two interfaces. IP Line cards provide the
Gateway functionality.
IP Line card Gatekeepers
The Gatekeeper provides endpoint management including
registration/unregistration, authentication, address resolution (DN to IP and
endpoint to Gateway), and maintaining a list of endpoints currently active on
the network. The IP Telecommuter system provides the Gatekeeper
functionality in the active leader and backup leader cards.
Meridian 1
The Meridian 1 provides the telephony features and call routing in the IP
Telecommuter system.
MAT
Meridian Administration Tools (MAT) is used for the installation and
configuration of the IP Line card(s).

Description Page 17 of 262
ITG Line 1.0/IP Telecommuter Description, Installation and Operation
Figure 1
IP Telecommuter system architecture
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8860<587

Page 18 of 262 Description
553-3001-119 Standard 2.00 April 2000
Figures 2 through 5 show four possible IP Telecommuter configurations..
Figure 2
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Description Page 19 of 262
ITG Line 1.0/IP Telecommuter Description, Installation and Operation
Figure 3
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Page 20 of 262 Description
553-3001-119 Standard 2.00 April 2000
Figure 4
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