Source note · One SBC serving several calling platforms
For inbound calls to Teams Direct Routing, the phone number in the Request-URI and in the From header must include a leading plus sign.
Checked 2026-10-14
- Vendor
- Microsoft
- Product
- Teams Phone
- Subsystem
- Direct Routing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-14
- Checked
- 2026-10-14
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Detailed requirements for Contact header and Request-URI > Request-URI; From Header
Cite this note
APA
WarmTransfer. (2026, October 14). One SBC serving several calling platforms: source note multi-platform-sbc-design-teams-plus-in-request-uri. WarmTransfer. https://warmtransfer.net/knowledge/claims/multi-platform-sbc-design-teams-plus-in-request-uri
BibTeX
@misc{warmtransfer-claim-multi-platform-sbc-design-teams-plus-in-request-uri,
title = {One SBC serving several calling platforms: source note multi-platform-sbc-design-teams-plus-in-request-uri},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/multi-platform-sbc-design-teams-plus-in-request-uri},
note = {Source note multi-platform-sbc-design-teams-plus-in-request-uri, checked 2026-10-14}
}