The TLS version configured on a Teams Direct Routing SBC should be 1.2 or higher; older TLS versions can make the connection close at once.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Teams Direct Routing
- Subsystem
- TLS
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- SBC connectivity issues — Microsoft · tier 2 current vendor documentation · Section 'Issues related to the TLS connection' (intro paragraph)
Cite this note
APA
WarmTransfer. (2026, October 2). SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-teams-dr-tls12-minimum. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-teams-dr-tls12-minimum
BibTeX
@misc{warmtransfer-claim-sip-trunk-authentication-models-teams-dr-tls12-minimum,
title = {SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-teams-dr-tls12-minimum},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-teams-dr-tls12-minimum},
note = {Source note sip-trunk-authentication-models-teams-dr-tls12-minimum, checked 2026-10-02}
}