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

Microsoft's SIP protocol page both says Direct Routing rejects SIP requests that carry a Replaces header and says the SBC must support INVITE with Replaces.

disputed · 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
Status: disputed
Checked: 2026-09-30

Sources

Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Note under Processing the incoming request (Replaces headers); Replaces option section

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-replaces-conflict. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-teams-direct-routing-setup-replaces-conflict

BibTeX

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

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