RFC 6140 requires the service provider registrar to authenticate the SIP-PBX when it registers a block of numbers, giving SIP digest or mutual TLS as example mechanisms.
Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- registration
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 6140
- Checked
- 2026-10-02
Sources
- RFC 6140: Registration for Multiple Phone Numbers in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 5.2
Cite this note
APA
WarmTransfer. (2026, October 2). SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-rfc6140-registrar-auths-pbx. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-rfc6140-registrar-auths-pbx
BibTeX
@misc{warmtransfer-claim-sip-trunk-authentication-models-rfc6140-registrar-auths-pbx,
title = {SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-rfc6140-registrar-auths-pbx},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-rfc6140-registrar-auths-pbx},
note = {Source note sip-trunk-authentication-models-rfc6140-registrar-auths-pbx, checked 2026-10-02}
}