Nortel Networks NN43001-563 User Manual

Page 120

120

ITG engineering guidelines

Table 18 "Example: Traffic flow in a 4-node IP Trunk 3.01 (and later)
network" (page 120)

summarizes traffic flow of a 4-node IP Trunk 3.01

(and later) network.

Table 18
Example: Traffic flow in a 4-node IP Trunk 3.01 (and later) network

Destination Pair

Traffic in CCS

Santa Clara/Richardson

Santa Clara/Ottawa

Santa Clara/Tokyo

Richardson/Ottawa

Richardson/Tokyo

Ottawa/Tokyo

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
have the same image. If multiple codec images are used in an IP Trunk 3.01
(and later) network, the calls default to the G.711 group when the originating
and destination codecs are different.

The IP Trunk 3.01 (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% blocking Grade of Service" (page 99)

. The port requirements

for the example in

Table 18 "Example: Traffic flow in a 4-node IP Trunk 3.01

(and later) network" (page 120)

are given in

Table 19 "Example: Determine

IP trunk card requirements" (page 120)

Table 19
Example: Determine IP trunk card requirements

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