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

With media bypass, Teams Transport Relays send from ports 50000-59999 to the SBC, and the SBC must be able to reach relays on 50000-59999 and 3478-3481 because two relay versions are in use.

Checked 2026-09-30

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

Sources

Plan for media bypass with Direct Routing — Microsoft · tier 2 current vendor documentation · Requirements for using Transport Relays, port table and note

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-bypass-relay-ports. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-teams-direct-routing-setup-bypass-relay-ports

BibTeX

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

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