Nortel Networks NN43001-563 ITG engineering guidelines 87

Contents 5
IP Trunk3.01 (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
Technicalsupport level 86
ITG engineering guidelines 87
Contents 87
Introduction 89
Audience 90
Equipment requirements 90
Scope 92
Network engineering guidelines overview 92
IP Trunk3.01 (and later) traffic engineering 95
Estimate voice traffic calculations 95
Calculate the number of IP Trunk3.01 (and later) ports required 99
Calculate number of IP trunk cards required 101
Factors that effectthe 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 Trunk3.01 (and later) network 104
Endpoint type 105
The AverageHold 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 TrunkRoute Optimization (TRO)
considerations 115
WAN route bandwidth engineering 118
Assess WAN link resources 121
Link utilization 121
Estimate network loading caused by IP Trunk3.01 (and later) traffic 122
Route Link TrafficEstimation 123
Enough capacity 125
Insufficient link capacity 126
Other intranet resource considerations 126
Implement QoS in IP networks 126
Trafficmix 127
TCP traffic behavior 127
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21December 2007
Copyright© 2007, Nor tel Networks
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