Source note · DNS SRV and service discovery for SIP
Under RFC 5922 an implementation may examine the certificate CN field only if the certificate has no subjectAltName.
Checked 2026-09-24
If and only if the subjectAltName does not appear in the certificate, the implementation MAY examine the CN field of the certificate.
- Vendor
- IETF
- Product
- SIP over TLS
- Subsystem
- TLS identity
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 5922 (June 2010)
- Checked
- 2026-09-24
Sources
- RFC 5922: Domain Certificates in the Session Initiation Protocol (SIP) — RFC Editor / IETF · tier 1 standards and regulators · Section 7.1
Cite this note
APA
WarmTransfer. (2026, September 24). DNS SRV and service discovery for SIP: source note dns-srv-voice-rfc5922-cn-fallback. WarmTransfer. https://warmtransfer.net/knowledge/claims/dns-srv-voice-rfc5922-cn-fallback
BibTeX
@misc{warmtransfer-claim-dns-srv-voice-rfc5922-cn-fallback,
title = {DNS SRV and service discovery for SIP: source note dns-srv-voice-rfc5922-cn-fallback},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dns-srv-voice-rfc5922-cn-fallback},
note = {Source note dns-srv-voice-rfc5922-cn-fallback, checked 2026-09-24}
}