Call admission control


This module monitors the Voice-over-IP bandwidth and optionally reject calls if the provisioned bandwidth is exceeded.

Release notes

Version 1.1.0 - General deployment
  • Improvement: Improved site filters

Version 1.0.0 - General deployment
  • Feature: Initial release

Module configuration interface

create_resource_form: .:/usr/share/escaux/glue/lib:/usr/share/escaux/glue/bin/gen_wiki_documentation/src/lib:/usr/share/escaux/glue/bin/gen_wiki_documentation/src/lib/

Maximum VoIP bandwidth (bits/s)
Restrict calls
VoIP filter (example 'udp')
Site ID (1 to 10)
Site filter 1 (example:
Site filter 2 (example:
Site filter 3 (example:
Site filter 4 (example:
Site filter 5 (example:
Site filter 6 (example:
Site filter 7 (example:
Site filter 8 (example:
Site filter 9 (example:
Site filter 10 (example:

Module configuration parameters

This module assumes all the VoIP traffic goes through the SOP where the module is installed (i.e. re-invite procedure is not supported).

  • Maximum VoIP bandwidth (bits/s) : The maximum amount of Voice over IP bandwidth acceptable before taking an action to reject calls.
  • Restrict calls : Whether or not to hangup new calls when the maximum VoIP bandwidth is about to be exceeded.

The VoIP traffic is defined as the combination of 2 filters. The site filter and the VoIP filter (see infra):

  • VoIP filter (example 'udp') : The VoIP filter indicates the traffic considered as VoIP traffic. This will depend on the QoS rules applied by your provider. Typically 'udp' is a good approximation as VoIP protocols are the essential protocols which use udp and go through the SOP.
  • Site filter (example: : The site filter indicates the traffic monitored by the SOP where the module is installed. Typically it is the LAN where the SOP is installed expressed as a network address and mask.

The module generates 2 new attributes of the class 'flow' and attribute 'bandwidth' which can be monitored through the Advanced Historical Reporting:
  • VOIP_TX: amount of VoIP bandwidth in bits/s which leaves the site (as indicated by the site filter).
  • VOIP_RX: amount of VoIP bandwidth in bits/s which enters the site (as indicated by the site filter).

Sop shell plugins

4 plugin menus are available in the sop shell:
  • Start call admission process
  • Stop call admission process
  • View bandwidth usage log file
  • View call admission actions
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