Source note · SIP session timers
RFC 3311 UPDATE lets a UA change session parameters such as media without changing dialog state, including before the initial INVITE completes.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- UPDATE method
- Deployment
- on-premises, multi-tenant, hybrid
- Region
- not restricted
- Release range
- RFC 3311
- Checked
- 2026-09-25
Sources
- RFC 3311: The Session Initiation Protocol (SIP) UPDATE Method — IETF / RFC Editor · tier 1 standards and regulators · Abstract
Cite this note
APA
WarmTransfer. (2026, September 25). SIP session timers: source note sip-session-timers-update-before-answer. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-session-timers-update-before-answer
BibTeX
@misc{warmtransfer-claim-sip-session-timers-update-before-answer,
title = {SIP session timers: source note sip-session-timers-update-before-answer},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-session-timers-update-before-answer},
note = {Source note sip-session-timers-update-before-answer, checked 2026-09-25}
}