Source note · SIP session timers
A re-INVITE refresh should carry an SDP offer even if nothing changed, and the offer must indicate no change by reusing the prior origin field values.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- refresh method
- Deployment
- on-premises, multi-tenant, hybrid
- Region
- not restricted
- Release range
- RFC 4028
- Checked
- 2026-09-25
Sources
- RFC 4028: Session Timers in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 7.4 (Generating Subsequent Session Refresh Requests)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP session timers: source note sip-session-timers-reinvite-refresh-sdp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-session-timers-reinvite-refresh-sdp
BibTeX
@misc{warmtransfer-claim-sip-session-timers-reinvite-refresh-sdp,
title = {SIP session timers: source note sip-session-timers-reinvite-refresh-sdp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-session-timers-reinvite-refresh-sdp},
note = {Source note sip-session-timers-reinvite-refresh-sdp, checked 2026-09-25}
}