Source note · CUCM to Teams Phone migration
SBA does not support Emergency Call Routing Policies; EMER dial strings bypass normalization and are always sent without a leading plus, so if the customer has no pattern in their regular voice routing policy matching the EMER dial strings, emergency calls fail via SBA.
Checked 2026-09-16
EMER dial strings bypass normalization and are always sent without +.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- branch survivability and E911
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-16
- Checked
- 2026-09-16
Sources
- Survivable Branch Appliance for Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · Known issues and considerations > In SBA mode, the following user actions aren't supported
Cite this note
APA
WarmTransfer. (2026, September 16). CUCM to Teams Phone migration: source note cucm-to-teams-phone-sba-emer-dial-strings. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-sba-emer-dial-strings
BibTeX
@misc{warmtransfer-claim-cucm-to-teams-phone-sba-emer-dial-strings,
title = {CUCM to Teams Phone migration: source note cucm-to-teams-phone-sba-emer-dial-strings},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-sba-emer-dial-strings},
note = {Source note cucm-to-teams-phone-sba-emer-dial-strings, checked 2026-09-16}
}