A New Internet-Draft is available from the on-line Internet-Drafts directories.
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-07.txt
Pages : 42
Date : 2005-6-6
This specification 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. The usage of the
isfocus feature tag is defined.
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