| Feb. 22, 1996 | draft-ietf-mmusic-scip-00; IDMS paper |
| Feb. 22, 1996 | draft-ietf-mmusic-sip-00 |
| Dec. 2, 1996 | draft-ietf-mmusic-sip-01 |
| March 27, 1997 | draft-ietf-mmusic-sip-02 |
| July 31, 1997 | draft-ietf-mmusic-sip-03 |
| November 11, 1997 | draft-ietf-mmusic-sip-04 |
| May 14, 1998 | draft-ietf-mmusic-sip-05 |
| June 17, 1998 | draft-ietf-mmusic-sip-06 |
| July 16, 1998 | draft-ietf-mmusic-sip-07 |
| August 7, 1998 | draft-ietf-mmusic-sip-08 |
| September 18, 1998 | draft-ietf-mmusic-sip-09 |
| September 28, 1998 | Last call |
| November 12, 1998 | draft-ietf-mmusic-sip-10 |
| December 15, 1998 | draft-ietf-mmusic-sip-11 |
| January 15, 1999 | draft-ietf-mmusic-sip-12 |
| February 2, 1999 | Approved |
| March 17, 1999 | RFC 2543 |
| July 3, 2002 | RFC 3261 (SIP: Session Initiation Protocol), RFC 3262 (Reliability of Provisional Responses in Session Initiation Protocol (SIP)), RFC 3263 (Session Initiation Protocol (SIP): Locating SIP Servers), RFC 3264 (An Offer/Answer Model with Session Description Protocol (SDP)), RFC 3265 (Session Initiation Protocol (SIP)-Specific Event Notification), RFC 3266 (Support for IPv6 in Session Description Protocol (SDP)) published |
ISI developed the Connection Control Protocol, an early signaling protocol, around 1992. (IETF minutes IETF minutes)
H.323 was developed roughly in parallel, with the first version (H.323v1) published in November 1996.