[Sipping] I-D ACTION:draft-johnston-sipping-cc-conferencing-01.txt

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	Title		: Session Initiation Protocol Call Control -  
                          Conferencing for User Agents
	Author(s)	: A. Johnston, O. Levin
	Filename	: draft-johnston-sipping-cc-conferencing-01.txt
	Pages		: 24
	Date		: 2003-2-11
	
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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