SIP-Related Work

The SIP WG has primary responsibility for the future development of SIP, but SIP-related work occurs in a number of IETF working groups:

SIP WG

SIP standardization has moved from MMUSIC to the SIP working group, with its own mailing list and additional information, such as tasks, schedules and design teams.

SIPPING (Session Initiation Protocol Project INvestiGation)

"working group is chartered to document the application of SIP to certain domain tasks and to develop requirements for the changes or extensions to SIP needed to accomplish those tasks. The SIPPING working group will concentrate on the frameworks, requirements, and practices related to SIP and its extensions, and will not specify changes or extensions to SIP."

The supplemental web site contains schedules, working group drafts and other organizational information.

MMUSIC WG

For SDP, SAP and related topics.

3GPP

Release 5 and later use SIP in its Internet Multimedia Subsystem (IMS). The current status list is a good summary of the drafts, while specs/latest contains the most current drafts. In particular, TS 23.002 (architecture), TS 23.228 (concepts and procedures), 24.228 (call flows) and TS 24.229 (Call Control Protocol) contain most of the SIP-related material.

PINT

The PINT working group (now concluded) uses a profile of SIP.

iptel WG

The Call Processing Language is designed to work with SIP and control its operation. The Gateway Location Protocol can be used to introduce proxy servers to SIP.

impp WG (Instant Messaging and Presence Protocol)

SIP has been proposed as a solution, one of several, to the Internet presence and notification problem.

ETSI-Tiphon: DTS/TIPHON-03018 - Interface Protocol Requirements Definition; Implementation of TIPHON architecture using SIP