Source note · CUCM to Teams Phone migration
Direct Routing SIP signalling targets three FQDNs in priority order - sip.pstnhub.microsoft.com, sip2.pstnhub.microsoft.com and sip3.pstnhub.microsoft.com - resolving into 52.112.0.0/14 and 52.120.0.0/14, over SIP/TLS to destination port 5061.
Checked 2026-09-16
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- signalling and firewall
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-16
- Checked
- 2026-09-16
Sources
- Plan Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · Plan Direct Routing > SIP signalling: FQDNs and SIP signalling ports
Cite this note
APA
WarmTransfer. (2026, September 16). CUCM to Teams Phone migration: source note cucm-to-teams-phone-dr-connection-points. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-dr-connection-points
BibTeX
@misc{warmtransfer-claim-cucm-to-teams-phone-dr-connection-points,
title = {CUCM to Teams Phone migration: source note cucm-to-teams-phone-dr-connection-points},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-dr-connection-points},
note = {Source note cucm-to-teams-phone-dr-connection-points, checked 2026-09-16}
}