Source note · Calls that drop after about 30 seconds
RFC 4028 session timers, negotiated with the 'timer' option tag, still work when only one party to the call supports the extension.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- session timers
- Deployment
- any
- 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 · Introduction/overview of operation (backward compatibility)
Cite this note
APA
WarmTransfer. (2026, September 25). Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-one-sided-support. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-one-sided-support
BibTeX
@misc{warmtransfer-claim-sip-calls-drop-30-seconds-one-sided-support,
title = {Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-one-sided-support},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-one-sided-support},
note = {Source note sip-calls-drop-30-seconds-one-sided-support, checked 2026-09-25}
}