Nortel Networks NN43001-314 User Manual

Page 72

Bandwidth Management

Call scenario

A call is requested from a telephone in VPNI 1/Zone 2 on Call Server A to a
telephone in VPNI 3/Zone 3 on Call Server B. Both zones have Adaptive
Network Bandwidth Management enabled.

1. Call Server A contacts the Network Redirect Server to obtain the

address of Call Server B.

2. Call Server A sends a call setup message to Call Server B, identifying

the calling telephone’s VPNI and zone.

3. Call Server B determines if there is sufficient bandwidth for the call, and

sends back the VPNI and zone of the called telephone.

4. Call Server A checks its bandwidth table to determine if there is sufficient

bandwidth available for the call from Call Server A to Call Server B.

5. If Call Server A determines there is enough bandwidth available, the call

is established; otherwise, alternate treatment is provided in the form
of blocking or rerouting the call.

Both Call Server A and Call Server B must consult their own bandwidth
tables to determine if there is enough bandwidth for the call to proceed.

Figure 17 "Call Progress with Adaptive Network Bandwidth Management"
(page 73)

shows this scenario.

Nortel Communication Server 1000

Branch Office Installation and Commissioning

NN43001-314

01.02

Standard

Release 5.0

20 June 2007