Feature packaging, Figure 20 effect of a higher cqos coefficient, Figure 20 "effect of a higher cqos – Nortel Networks NN43001-314 User Manual

Page 76

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Bandwidth Management

Figure 20
Effect of a higher CQoS Coefficient

Other configurable coefficients used in the calculation are the QoS
Coefficient (CQoS), QoS Response Time Increase (ZQRT), and QoS
Response Time Interval (ZQRTI). CQoS, Cr, Cd, Cpl, and Cj control the
rate of bandwidth decrease, while ZQRT and ZQRTI control the rate of
bandwidth increase.

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

Call Admission Control (CAC) package 407

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.

Nortel Communication Server 1000

Branch Office Installation and Commissioning

NN43001-314

01.02

Standard

Release 5.0

20 June 2007

Copyright © 2007, Nortel Networks

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