Nortel Networks SRG 50 NN43001-307 - Manual (Page 116)

116 Bandwidth Management
The Call Admission Control (CAC) Validity Time Interval (CACVT) is used to
control the length of time that records from a Call Server are saved in the
Bandwidth Management table. If there have not been any calls between two
Call Servers within the configured time, the Call Server is removed from the
table. For example, if Call Server A has Call Server B in the table, and no
call has been placed between A and B for the CACVT time, then Call Server
A removes all Call Server B records in the table.
Limitations
Virtual Office IP Phones are not subject to bandwidth limitations. They
may not have the correct zone information configured. They can also be
controlled by a Call Server that is not responsible for the particular zone.
Thus, bandwidth management is not possible for these phones.
Feature packaging
The Adaptive Network Bandwidth Management feature requires the
following packages:
• QoS Enhanced Reporting (PVQM) package 401
ATTENTION
Package 401, QoS Enhanced Reporting (PVQM), is required if the R value
from the Phase II IP Phones is to be reported and used in the calculations.
• Call Admission Control (CAC) package 407
Configuration rules
The configuration rules for Adaptive Network Bandwidth Management are
as follows:
• Each main office Call Server in a network must have a unique non-zero
VPNI.
• All branch offices associated with a particular main office must have the
same VPNI as the main office Call Server.
• All IP Phones (other than specific IP Softphone 2050) and DSP
endpoints on a Call Server must be configured for the same zone.
• IP Softphone 2050 being used remotely must be configured for Zone 0.
• Branch office systems must tandem all calls through the main office Call
Server to allow bandwidth monitoring and control. In this case, the media
path is direct between the branch office and any point in the network.
• Trunk Route Optimization (TRO) must be disabled between the main
office Call Server and the SRG. In this case, the media path is direct
between the branch office and any point in the network.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright © 2005-2007, Nortel Networks
.