Nortel Networks Remote Gateway 50 - Manual (Page 74)

Page 74 of 258 Bandwidth Management
553-3001-207 Standard 2.00 January 2006
Figure 13
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