Source note · Teams Phone Direct Routing and SBC certification
For incoming calls, the phone number in the Request-URI (and in the From header, for blocking and reverse lookup) must contain a leading plus sign.
Checked 2026-09-23
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- sip-signaling
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-23
- Checked
- 2026-09-23
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · sections 'Request-URI' and 'From Header'
Cite this note
APA
WarmTransfer. (2026, September 23). Teams Phone Direct Routing and SBC certification: source note teams-direct-routing-request-uri-plus. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-direct-routing-request-uri-plus
BibTeX
@misc{warmtransfer-claim-teams-direct-routing-request-uri-plus,
title = {Teams Phone Direct Routing and SBC certification: source note teams-direct-routing-request-uri-plus},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-direct-routing-request-uri-plus},
note = {Source note teams-direct-routing-request-uri-plus, checked 2026-09-23}
}