| Abstract
|
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.
|
