Source note · SIP registration failures
On the wire, a REGISTER timeout in an RFC 4320-compliant path usually shows as repeated REGISTER retransmissions with no final response, and any 408 a phone reports is probably generated locally by its own transaction layer rather than received.
inferred · Checked 2026-09-25
- Vendor
- not restricted
- Product
- SIP
- Subsystem
- transactions
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Status
- inferred
- Checked
- 2026-09-25
Sources
- RFC 4320: Actions Addressing Identified Issues with the Session Initiation Protocol's (SIP) Non-INVITE Transaction — RFC Editor / IETF · tier 1 standards and regulators · Sections 2.2 and 4.2
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-timeout-looks-silent. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-timeout-looks-silent
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-timeout-looks-silent,
title = {SIP registration failures: source note sip-registration-failures-timeout-looks-silent},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-timeout-looks-silent},
note = {Source note sip-registration-failures-timeout-looks-silent, checked 2026-09-25}
}