Nortel Networks SRG 50 NN43001-307 User Manual

Page 161

Description

161

This feature enables alternate routing to occur for branch office users
registered to the main office, when they place interzone, station-to-station
calls to main office stations or branch office stations.

The Alternative Call Routing for NBWM feature can be triggered by
operation of either of the following features:

•

NBWM

•

Adaptive Network Bandwidth Management

For more information on Network Bandwidth Management and Adaptive
Network Bandwidth Management, see IP Peer Networking Installation and
Commissioning (NN43001-313).

The Alternative Call Routing for NBWM feature can be implemented to
operate in one of the following two ways:

•

Bandwidth insufficiency: Alternately routes station-to-station IP network
calls that encounter lack of bandwidth or poor QoS in the originating or
terminating zone as the calls are being established

•

All Calls: Alternately routes station-to-station IP network calls,
regardless of available bandwidth

Configure one of these two modes of operation (Bandwidth insufficiency or
All Calls) on a zone basis.

The Alternative Call Routing for NBWM feature deals only with interzone
calls. This feature is configurable for main office and branch office zones,
not virtual trunk zones.

It is possible to configure this feature to reroute all calls to MCDN or PSTN
routes and still maintain the main office-branch office architecture.

ALTPrefix

When the Alternative Call Routing for NBWM feature is invoked, the dialed
number is modified with a prefix (called the ALTPrefix) inserted at the
beginning of the digit string. The ALTPrefix can have a maximum of seven
digits.

The system handles the call with the ALTPrefix inserted as if the user had
dialed the digits.

The ALTPrefix applies to the zone in which the call originates. There is one
ALTPrefix for each zone that requires alternate routing.

All Call Servers must be able to translate the ALTPrefixes for all zones that
require Alternative Call Routing for NBWM.

Nortel Communication Server 1000

Main Office Configuration Guide for SRG 50

NN43001-307

02.02

Standard

Release 5.0

3 December 2007