Specifications

Chapter 6 Configuring VoIP
Configure Number Expansion
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Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Custom queuing and other methods for identifying high-priority streams should
be configured for these port ranges. For more information about custom queuing,
refer to the “Managing System Performance” section in the Configuration
Fundamentals Configuration Guide for Cisco IOS Release 12.0 T.
Configure Weighted Fair Queuing
Weighted fair queuing ensures that queues do not starve for bandwidth and that
traffic gets predictable service. Low-volume traffic streams receive preferential
service, while high-volume traffic streams share the remaining capacity, obtaining
equal or proportional bandwidth.
In general, weighted fair queuing is used in conjunction with multilink PPP with
interleaving and RSVP or IP precedence to ensure voice packet delivery. Use
weighted fair queuing with multilink PPP to define how data is managed; use
RSVP or IP precedence to give priority to voice packets. For more information
about weighted fair queuing, refer to the “Managing System Performance”
section in the Configuration Fundamentals Configuration Guide for Cisco IOS
Release 12.0 T.
Configure Number Expansion
In most corporate environments, the telephone network is configured so that you
can reach a destination by dialing only a portion (an extension number) of the full
E.164 telephone number. You can configure VoIP to recognize extension numbers
and expand them into their full E.164 dialed number by using two commands in
tandem: destination-pattern and num-exp. Before you configure these two
commands, it helps to map individual telephone extensions with their full E.164
dialed numbers. You can do this by creating a number expansion table.