This document defines a conference event package for tightly coupled conferences using the Session Initiation Protocol (SIP) events framework@ along with a data format used in notifications for this package. The conference package allows users to subscribe to a conference Uniform Resource Identifier (URI). Notifications are sent about changes in the membership of this conference and optionally about changes in the state of additional conference components.
RFC 4575-2006 history
2006RFC 4575-2006 A Session Initiation Protocol (SIP) Event Package for Conference State