Nortel Networks Remote Gateway 50 - Manual (Page 93)

Bandwidth Management Page 93 of 258
Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
Tandem Bandwidth Management overview
In order for the main office to correctly keep track of all the bandwidth being
used to and from a branch office the call must be tandemed through the main
office. When calls are tandemed through the main office only the signaling is
tandemed, the actual voice bandwidth travels directly between the source and
destination.
Bandwidth utilization for the branch office is tracked at the main office and
can be displayed in LD 117 using the PRT INTERZONE command. In order
to provide the correct bandwidth utilization to the main office Call Server,
when a branch office is calling another node in the network, the calls must be
tandemed through the main office Call Server in both the inbound and
outbound direction.
Entering the main office Gateway endpoint identifier in the Tandem Endpoint
field for each branch office gateways configured on the NRS only provides
tandeming in the outbound direction from each branch office (from branch
office to main office).
In order to tandem calls through the main office in the inbound direction
(from main office to branch office), one must make use of the dialing plan
capabilities of the CS 1000 to first route the call to the main office. The main
office prepends a prefix to the dialed number and the number is routed to the
branch office.
Tandeming all branch office calls through the main office allows the main
office to keep track of the bandwidth being used at each branch office.
Application
This feature applies to the branch office and the Adaptive Bandwidth
Management feature. Specifically, it applies to calls made to and from the
branch office from either telephones registered locally at the branch office
(digital, analog [500/2500-type], and IP Phones) or trunks at the branch office
to another node in the network. It does not apply when using branch office IP
Phones that are registered with the main office (for example, Normal Mode).