Source note · Setting up CUBE as a Microsoft Teams Direct Routing SBC

For incoming calls Direct Routing requires the phone numbers in the Request-URI and the From header to carry a leading plus sign, and Microsoft recommends always adding user=phone to the Request-URI.

Checked 2026-09-30

Vendor: Microsoft
Product: Microsoft Teams Phone
Subsystem: Direct Routing SIP
Deployment: multi-tenant
Region: not restricted
Release range: current as of 2026-09-30
Checked: 2026-09-30

Sources

Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Request-URI; From Header; Use of Request-URI parameter user=phone

Cite this note

APA

WarmTransfer. (2026, September 30). Setting up CUBE as a Microsoft Teams Direct Routing SBC: source note cube-teams-direct-routing-setup-plus-e164-uri. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-teams-direct-routing-setup-plus-e164-uri

BibTeX

@misc{warmtransfer-claim-cube-teams-direct-routing-setup-plus-e164-uri,
  title  = {Setting up CUBE as a Microsoft Teams Direct Routing SBC: source note cube-teams-direct-routing-setup-plus-e164-uri},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cube-teams-direct-routing-setup-plus-e164-uri},
  note   = {Source note cube-teams-direct-routing-setup-plus-e164-uri, checked 2026-09-30}
}

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