Figure 2 directly-routed call – Nortel Networks NN43001-563 User Manual

Page 22

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22

Overview of IP Trunk 3.01

WARNING

The only Gatekeeper that IP Trunk 3.01 (and later) officially
supports is the CS 1000M Gatekeeper. Gatekeeper calls made
between the CS 1000M system and IP Trunk 3.01 (and later) are
directly-routed calls.

Directly-routed calls

In directly-routed calls, the Gatekeeper returns the IP address of the call’s
actual destination.

Figure 2 "Directly-routed call" (page 22)

on

Figure 2 "Directly-routed call"

(page 22)

represents a directly-routed call. Once the destination IP address

is obtained, the originator sends the call directly to the destination node.

Figure 2
Directly-routed call

Gatekeeper-routed calls

In Gatekeeper-routed calls, the Gatekeeper returns the Gatekeeper’s IP
address and port as both the destination for the originating call and the
originator for the destination, rather than the end-point address and port.

Figure 3 "Gatekeeper-routed call" (page 23)

represents a Gatekeeper-routed

call. The destination IP address provided by the Gatekeeper is the
Gatekeeper’s IP address. All messages are routed through the Gatekeeper.

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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