Source note · SIP TLS handshake failures on trunks
The discontinued pre-change test endpoint for the new Direct Routing CA was sip.g1.pstnhub.microsoft.com on port 5061, meant only for SIP OPTIONS pings and never for voice traffic.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- certificate lifecycle
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- historical; endpoint discontinued by 2026-09-15
- Checked
- 2026-09-25
Sources
- What's New Direct Routing — Microsoft · tier 2 current vendor documentation · Testing endpoint for upcoming certificate changes (February 16, 2026)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-test-endpoint-g1. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-test-endpoint-g1
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-dr-test-endpoint-g1,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-test-endpoint-g1},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-test-endpoint-g1},
note = {Source note sip-tls-handshake-failures-dr-test-endpoint-g1, checked 2026-09-25}
}