Nortel Networks Remote Gateway 50 manual Nbwm

Alternative Call Routing for Network Bandwidth Management Page 129 of 258

When there is insufficient bandwidth for a station-to-station call, the Alternative Call Routing for NBWM feature uses a trunk for a call which would not normally use a trunk.

Prior to the introduction of the Alternative Call Routing for NBWM feature, there was no alternate routing mechanism for the following types of station-to-station calls:

•Branch office calls to or from the main office

•Branch office calls to or from another branch office controlled by the same main office

Note: The term “branch office” refers to Media Gateway 1000B (MG1000B) and Survivable Remote Gateway (SRG) systems in this document.

This feature enables alternate routing to occur for branch office users registered to the main office, when they place inter-zone, 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, refer to IP Peer Networking: Installation and Configuration (553-3001-213).

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

Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide