Source note · Setting up CUBE as a Microsoft Teams Direct Routing SBC
The SBC must be configured to stop retrying on a 603 response; otherwise a user who declines a call sees several missed calls.
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 · Handling retries (603 response)
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-603-no-retry. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-teams-direct-routing-setup-603-no-retry
BibTeX
@misc{warmtransfer-claim-cube-teams-direct-routing-setup-603-no-retry,
title = {Setting up CUBE as a Microsoft Teams Direct Routing SBC: source note cube-teams-direct-routing-setup-603-no-retry},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cube-teams-direct-routing-setup-603-no-retry},
note = {Source note cube-teams-direct-routing-setup-603-no-retry, checked 2026-09-30}
}