Cisco TelePresence Video Communication Server Administrator's Manual page 255

<!-- Call attempt failed with 404 (Not Found) -->
<taa:location url="notfound-message@example.com" clear="yes">
<proxy/>
</taa:location>
</failure>
<failure>
<!-- General catch-all failure handler for all other error responses -->
<taa:location url="failed-message@example.com" clear="yes">
<proxy/>
</taa:location>
</failure>
</proxy>
</taa:routed>
</cpl>
CPL example: reject attempts to subscribe to a presentity
In this example, attempts to subscribe to the presence of user@example.com are rejected.
<?xml version="1.0" encoding="UTF-8" ?>
<cpl xmlns="urn:ietf:params:xml:ns:cpl"
xmlns:taa="http://www.tandberg.net/cpl-extensions"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:ietf:params:xml:ns:cpl cpl.xsd">
<taa:routed>
<taa:rule-switch>
<taa:rule origin=".*" destination="user@example.com" message-
regex="^SUBSCRIBE.*">
<!-- Cannot subscribe to user@example.com -->
<!-- Reject call with a status code of 403 (Forbidden) -->
<reject status="403" reason="Denied by policy"/>
</taa:rule>
</taa:rule-switch>
</taa:routed>
</cpl>
Cisco VCS Administrator Guide (X6.1)
Reference material
Page 255 of 401