Azure Communication Services direct routing supports only TLS 1.2 for SBC signalling, with a fixed list of four ECDHE-RSA cipher suites.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Azure Communication Services
- Subsystem
- TLS
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Azure direct routing infrastructure requirements - Azure Communication Services — Microsoft · tier 2 current vendor documentation · Section 'SBC certificates and domain names' (Important callout)
Cite this note
APA
WarmTransfer. (2026, October 2). SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-acs-dr-tls12-only. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-acs-dr-tls12-only
BibTeX
@misc{warmtransfer-claim-sip-trunk-authentication-models-acs-dr-tls12-only,
title = {SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-acs-dr-tls12-only},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-acs-dr-tls12-only},
note = {Source note sip-trunk-authentication-models-acs-dr-tls12-only, checked 2026-10-02}
}