164 Alternative Call Routing for Network Bandwidth Management
Examples of Alternative Call Routing for NBWM in operationA 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 haveaccess to the PSTN. TheWide 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
Gatewaybelong to the MO zone. Thebranch officeand Telephone B belong
to the BO2 zone.
Figure 66
Call between a branch office telephone in Normal Mode and a main office
telephone
TelephoneB calls Telephone A (the user dials DN 5262). In this example,
the call alternately routes to the PSTN. (The PSTN telephone number of
TelephoneA 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 ALTPrefixfor the BO2 zone.
Nortel Communication Server 1000
Main Office Configuration Guide forSRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright© 2005-2007, Nor tel Networks
.