Nortel Networks SRG 50 NN43001-307 User Manual

Page 164

164

Alternative Call Routing for Network Bandwidth Management

Examples of Alternative Call Routing for NBWM in operation

A call from a branch office telephone to a main office telephone

Figure 66 "Call between a branch office telephone in Normal Mode and
a main office telephone" (page 164)

shows an example of an alternately

routed call between two CS 1000 systems. The system shown on the left
is a main office. The system shown on the right is a branch office. Both
systems have access to the PSTN. The Wide Area Network (WAN) is shown
in the center with a gatekeeper/Network Routing Service (NRS) that can be
co-resident with a Signaling Server. IP Phones are also shown associated
with each system. Telephone A belongs to the main office. Telephone B
is a telephone at the branch office registered to the main office. There are
two bandwidth zones indicated by the dashed line (main office zone - MO
zone and branch office zone - BO2 zone). Telephone A and the Media
Gateway belong to the MO zone. The branch office and Telephone B belong
to the BO2 zone.

Figure 66
Call between a branch office telephone in Normal Mode and a main office
telephone

Telephone B calls Telephone A (the user dials DN 5262). In this example,
the call alternately routes to the PSTN. (The PSTN telephone number of
Telephone A is 613-966-5262.)

Configuration required

Configure the following:

At the main office:

•

Use one of the dialing plan software packages to process the call, such
as CDP or NARS.

•

Provision an ALTPrefix for the BO2 zone.

Nortel Communication Server 1000

Main Office Configuration Guide for SRG 50

NN43001-307

02.02

Standard

Release 5.0

3 December 2007