This RFC describes multimedia conferencing scenarios. It describes both basic and advanced conferencing scenarios involving voice, video, text, and interactive text sessions. These scenarios will help with the definition and evaluation of the protocols being developed in the centralized conferencing XCON working group.

This RFC describes how to create a conference using SIP URI-list services. In particular, it describes a mechanism that allows a User Agent Client to provide a conference server with the initial list of participants using an INVITE-contained URI list.

Read RFC 5366.

This RFC describes how to invoke transcoding services using the conference bridge model. This way of invocation meets the requirements for SIP regarding transcoding services invocation to support deaf, hard of hearing, and speech-impaired individuals.

Read RFC 5370.

RFC 4856: Media Type Registration of Payload Formats in the RTP Profile for Audio and Video Conferences
RFC 4575: A Session Initiation Protocol (SIP) Event Package for Conference State