Third party call control with SDP preconditions

Document Type Expired Internet-Draft (individual)
Author Gonzalo Camarillo 
Last updated 2000-07-13
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes how to perform third party call control in SIP when SDP preconditions are used. There are no new SIP extensions needed to accomplish this. The mechanism outlined is illustrated with an example in order to help understand it.


Gonzalo Camarillo (

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