Source note · SIP registration failures
A registrar may reject a REGISTER whose requested expiration is too short with 423 Interval Too Brief carrying a Min-Expires header, and the UA may retry with every contact's expiration set at or above the Min-Expires value.
Checked 2026-09-25
- Vendor
- not restricted
- Product
- SIP
- Subsystem
- registration
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3261
- Checked
- 2026-09-25
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · Sections 10.2.8 (Error Responses) and 10.3 (Processing REGISTER Requests)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-423-min-expires. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-423-min-expires
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-423-min-expires,
title = {SIP registration failures: source note sip-registration-failures-423-min-expires},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-423-min-expires},
note = {Source note sip-registration-failures-423-min-expires, checked 2026-09-25}
}