I-D ACTION:draft-johnston-sipping-cc-conferencing-00.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-00.txt
	Pages		: 23
	Date		: 2002-10-29
	
This document describes providing Conferencing call control 
capabilities in the Session Initiation Protocol (SIP).  This document 
builds on the Conferencing Requirements and Framework documents to 
show how a tightly coupled SIP conference will work.  The approach is 
explored from a user agent (UA) perspective.  Three types of UAs are 
described: a conferencing unaware UA, one capable of being a full 
member of a conference, and one also capable of hosting a conference.  
The use of URIs in conferencing, OPTIONS for capability discovery, 
and call control using REFER are covered in detail with example call 
flow diagrams.

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