Source note · SIP trunk carrier turn-up and acceptance testing
Microsoft forces TLS 1.2 on the Direct Routing SIP interface, and the SBC must connect with one of four listed ECDHE-RSA AES cipher suites (256/128-bit GCM, or 256/128-bit CBC with SHA-384/SHA-256).
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- security
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Connect your Session Border Controller (SBC) to Direct Routing — Microsoft · tier 2 current vendor documentation · Connect the SBC to the tenant > Considerations
Cite this note
APA
WarmTransfer. (2026, September 25). SIP trunk carrier turn-up and acceptance testing: source note sip-trunk-carrier-turn-up-dr-tls12. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-carrier-turn-up-dr-tls12
BibTeX
@misc{warmtransfer-claim-sip-trunk-carrier-turn-up-dr-tls12,
title = {SIP trunk carrier turn-up and acceptance testing: source note sip-trunk-carrier-turn-up-dr-tls12},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-carrier-turn-up-dr-tls12},
note = {Source note sip-trunk-carrier-turn-up-dr-tls12, checked 2026-09-25}
}