RFC 3311: The Session Initiation Protocol (SIP) UPDATE Method

Publisher

IETF / RFC Editor

URL

https://www.rfc-editor.org/rfc/rfc3311.html

Published

2002-09-01

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

IETF Trust legal provisions (BCP 78); no-redistribution; short excerpts and locators only

Source notes citing this source

• RFC 3311 recommends re-INVITE rather than UPDATE for session changes on confirmed dialogs because UPDATE needs an immediate answer. in context
• Support for UPDATE is signalled by listing UPDATE in the Allow header of the INVITE and of reliable provisional or final responses. in context
• RFC 3311 UPDATE lets a UA change session parameters such as media without changing dialog state, including before the initial INVITE completes. in context

Cite this source record

APA

WarmTransfer. (2002, September 1). RFC 3311: The Session Initiation Protocol (SIP) UPDATE Method. WarmTransfer. https://warmtransfer.net/knowledge/sources/rfc-3311-update

BibTeX

@misc{warmtransfer-rfc-3311-update,
  title  = {RFC 3311: The Session Initiation Protocol (SIP) UPDATE Method},
  author = {{WarmTransfer}},
  year   = {2002},
  url    = {https://warmtransfer.net/knowledge/sources/rfc-3311-update},
  note   = {IETF / RFC Editor, accessed 2026-09-25}
}