Source note · CUCM to Teams Phone migration
Direct Routing treats an SBC as healthy if it sent SIP OPTIONS within the last three regular one-minute intervals, and an SBC that has not is demoted so that it is not tried first, though a demoted SBC is retried before the call fails.
Checked 2026-09-21
- Vendor
- Microsoft
- Product
- Teams Phone
- Subsystem
- direct-routing-monitoring
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-21
- Checked
- 2026-09-21
Sources
- Monitor Direct Routing — Microsoft · tier 2 current vendor documentation · Monitoring availability of Session Border Controllers using Session Initiation Protocol (SIP) options messages
Cite this note
APA
WarmTransfer. (2026, September 21). CUCM to Teams Phone migration: source note cucm-to-teams-phone-monitor-options-health-window. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-monitor-options-health-window
BibTeX
@misc{warmtransfer-claim-cucm-to-teams-phone-monitor-options-health-window,
title = {CUCM to Teams Phone migration: source note cucm-to-teams-phone-monitor-options-health-window},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-monitor-options-health-window},
note = {Source note cucm-to-teams-phone-monitor-options-health-window, checked 2026-09-21}
}