Source note · Troubleshooting Teams Direct Routing
A demoted SBC isn't tried first. Direct Routing tries the other SBCs in the route, then retries the demoted SBC before generating a failure. When two or more SBCs in a route are equally healthy and equal in priority, calls are spread across them with a Fisher-Yates shuffle.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Microsoft Teams Phone Direct Routing
- Subsystem
- call-routing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Monitor Direct Routing — Microsoft · tier 2 current vendor documentation · Monitoring availability of Session Border Controllers using Session Initiation Protocol (SIP) options messages, paragraphs on demotion and Fisher-Yates
Cite this note
APA
WarmTransfer. (2026, September 25). Troubleshooting Teams Direct Routing: source note teams-direct-routing-troubleshooting-route-demotion. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-direct-routing-troubleshooting-route-demotion
BibTeX
@misc{warmtransfer-claim-teams-direct-routing-troubleshooting-route-demotion,
title = {Troubleshooting Teams Direct Routing: source note teams-direct-routing-troubleshooting-route-demotion},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-direct-routing-troubleshooting-route-demotion},
note = {Source note teams-direct-routing-troubleshooting-route-demotion, checked 2026-09-25}
}