Source note · Troubleshooting calls that drop on hold or transfer
The absolute minimum Session-Expires value is 90 seconds and 1800 seconds (30 minutes) is RECOMMENDED.
Checked 2026-09-30
- Vendor
- IETF
- Product
- SIP
- Subsystem
- session-timer
- Deployment
- any
- Region
- not restricted
- Release range
- RFC as published
- Checked
- 2026-09-30
Sources
- RFC 4028: Session Timers in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 4 (Session-Expires Header Field Definition)
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-session-expires-values. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-session-expires-values
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-session-expires-values,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-session-expires-values},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-session-expires-values},
note = {Source note sip-reinvite-call-drops-session-expires-values, checked 2026-09-30}
}