Source note · SIP registration failures
RFC 5626 requires registrars that implement it to support the Path header mechanism, and the outbound option tag tells the UA the registrar is compliant.
Checked 2026-09-25
Registrars that implement this specification MUST support the Path header mechanism
- Vendor
- not restricted
- Product
- SIP
- Subsystem
- registration
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 5626
- Checked
- 2026-09-25
Sources
- RFC 5626: Managing Client-Initiated Connections in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 6 (Registrar Behavior) and Section 4.2.1
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-outbound-path-required. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-outbound-path-required
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-outbound-path-required,
title = {SIP registration failures: source note sip-registration-failures-outbound-path-required},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-outbound-path-required},
note = {Source note sip-registration-failures-outbound-path-required, checked 2026-09-25}
}