Microsoft's example translates a four-digit called number arriving from the SBC into E.164 with an InboundTeamsNumberTranslationRules entry matching ^(\d{4})$, so a caller who dials only four digits still reaches the Teams user.
Checked 2026-09-24
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- number translation
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Translate phone numbers for Direct Routing — Microsoft · tier 2 current vendor documentation · Example SBC configuration; Example 2: Inbound call to a four-digit number
Cite this note
APA
WarmTransfer. (2026, September 24). Building a hybrid Unified CM and Teams Phone environment for a phased migration: source note cucm-teams-hybrid-build-tr-four-digit-inbound. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-teams-hybrid-build-tr-four-digit-inbound
BibTeX
@misc{warmtransfer-claim-cucm-teams-hybrid-build-tr-four-digit-inbound,
title = {Building a hybrid Unified CM and Teams Phone environment for a phased migration: source note cucm-teams-hybrid-build-tr-four-digit-inbound},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-teams-hybrid-build-tr-four-digit-inbound},
note = {Source note cucm-teams-hybrid-build-tr-four-digit-inbound, checked 2026-09-24}
}