Nortel Networks NN43001-314 Examples of Alternative Call Routing for NBWM in operation, A call from a Branch Ofce telephone to a main ofce telephone

132 Alternative Call Routing for Network Bandwidth Management
Calls preceded by the ALTPrefixcan be handled by the Vacant Number
Routing (VNR) feature. Use Flexible Numbering Plan (FNP) software for
this type of routing.
Examples of Alternative Call Routing for NBWM in operation
The main office systems shown in the diagrams in this chapter are CS
1000E systems. However, this featureis supported on any CS 1000 system.
A call from a Branch Office telephone to a main office telephone
Figure 49 "Example of an alternately routed call between a Branch Office
telephone in Normal Mode and a main of" (page 132) shows 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 shownin 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.
TelephoneA 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). TelephoneA and the Media Gateway belong to the MO
zone. The Branch Office and Telephone B belong to the BO2 zone.
Figure 49
Example of an alternately routed 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.)
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright© 2007, Nor tel Networks
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