Nortel 1000 Fundamentals page 6

6 Contents
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
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
Copyright © 2007, Nortel Networks
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segments 157
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007