Nortel Networks NN43001-563 - Manual (Page 8)

8 Contents
Use of Frame Relay and ATM services 130
Internet Protocols and ports used by IP Trunk 3.01 (and later) 131
QoS fallback thresholds and IP Trunk 3.01 (and later) 132
Fine-tune network QoS 133
Components of delay 133
Reduce link delay 136
Reduce hop count 137
Adjust jitter buffer size 137
Reduce packet loss 137
Routing issues 138
Network modeling 138
Time-of-Day voice routing 139
Measure intranet QoS 140
QoS evaluation process overview 140
Set QoS expectations 140
Obtain QoS measurement tools 144
Measure end-to-end network delay 144
Measure end-to-end packet loss 146
Adjust PING measurements 146
Network delay and packet loss evaluation example 147
Other measurement considerations 148
Estimate voice quality 148
Does the intranet meet expected IP Trunk 3.01 (and later) QoS? 153
IP Trunk 3.01 (and later) LAN installation and configuration 154
Basic setup of the IP Trunk 3.01 (and later) system 154
IP trunk card connections 154
Configure a system with separate subnets for voice and management 155
Subnet configurations 155
Selecting public or private IP addresses 157
Single subnet option for voice and management 157
Multiple IP Trunk 3.01 (and later) nodes on the same ELAN and TLAN segments 158
General LAN considerations 158
ELAN and TLAN network interface half- or full-duplex operation 158
TLAN subnet design 159
Configure the TLAN subnet IP router 159
Setting up the ELAN subnet 160
How to avoid system interruption 160
IP Trunk 3.01 (and later) DSP profile settings 162
Codec types 162
Payload size 163
Jitter buffer parameters (voice playout delay) 163
Silence Suppression parameters (Voice Activity Detection) 164
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2007, Nortel Networks
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