Framework for Transcoding with the Session Initiation Protocol

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Last updated 2003-08-29
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a framework for transcoding with SIP. This framework includes how to discover the need of transcoding services in a session and how to invoke those transcoding services. Two models for transcoding services invocation are discussed; the conference bridge model and the third party call control model. Both models meet the requirements for SIP regarding transcoding services invocation to support deaf, hard of hearing and speech-impaired individuals.


Gonzalo Camarillo (

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