Factors that effectthe real-time capacity 119
Table18 "Example: Traffic flow in a 4-node IP Trunk 3.01 (and later)
network" (page 119) summarizes traffic flow of a 4-node IP Trunk3.01
(and later) network.
Table 1 8
Example: Traffic flow in a 4-node IP Trunk3.01 (and later) network
Destination Pair Traffic in CCS
Santa Clara/Richardson 60
Santa Clara/Ottawa 45
Santa Clara/Tokyo 15
Richardson/Ottawa 35
Richardson/Tokyo 20
Ottawa/Tokyo 18
The codec selection is on a per-IP trunk card basis. During call setup
negotiation, only the type of codec available at both destinations is selected.
When no agreeable codec is available at both ends, the default codec
G.711 is used.
Nortel recommends that all cards in an IP Trunk 3.01 (and later) system
havethe same image. If multiple codec images are used in an IP Trunk 3.01
(and later) network, the calls default tothe G.711 group when the originating
and destination codecs are different.
The IP Trunk3.01 (and later) port requirement for each node is calculated
by counting the traffic on a per-node basis, based on Table 10 "Trunk
traffic, Poisson 1 per cent blocking Grade of Service" (page 99). The
port requirements for the example in Table18 "Example: Traffic flow in a
4-node IP Trunk3.01 (and later) network" (page 119) are given in Tabl e 19
"Example: Determine IP trunk card requirements" (page 119).
Table 1 9
Example: Determine IP trunk card requirements
ITG Site Traffic in CCS ITG Ports IP trunk cards
Santa Clara 120 9 1
Richardson 115 9 1
Ottawa 98 8 1
Tokyo 53 6 1
Assume that the preferred codec to handle VoIP calls in this network is
G.729AB.
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21December 2007
Copyright© 2007, Nor tel Networks
.