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This draft is a work item of the Session Initiation Proposal Investigation Working Group of the IETF.
Title : Session Initiation Protocol Call Control -
Conferencing for User Agents
Author(s) : A. Johnston, O. Levin
Filename : draft-ietf-sipping-cc-conferencing-01.txt
Pages : 26
Date : 2003-7-1
This document defines conferencing call control features for the
Session Initiation Protocol (SIP). This document builds on the
Conferencing Requirements and Framework documents to define how a
tightly coupled SIP conference works. The approach is explored from
different user agent (UA) types perspective: conference-unaware,
conference-aware and focus UAs. The use of URIs in conferencing,
OPTIONS for capabilities discovery, and call control using REFER are
covered in detail with example call flow diagrams.
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