Source note · Microsoft Teams Phone architecture and licensing
A Direct Routing Survivable Branch Appliance supports local PSTN calling during a Microsoft-cloud connectivity outage when the branch intranet and SBC remain reachable.
Checked 2026-09-06
- Vendor
- Microsoft
- Product
- Teams Phone
- Subsystem
- branch survivability
- Deployment
- direct-routing-sba
- Region
- not restricted
- Release range
- current as of 2026-09-06
- Checked
- 2026-09-06
Sources
- Survivable Branch Appliance for Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · Survivable Branch Appliance, opening scenario
Cite this note
APA
WarmTransfer. (2026, September 6). Microsoft Teams Phone architecture and licensing: source note teamsphone-sba-preserves-pstn-during-internet-outage. WarmTransfer. https://warmtransfer.net/knowledge/claims/teamsphone-sba-preserves-pstn-during-internet-outage
BibTeX
@misc{warmtransfer-claim-teamsphone-sba-preserves-pstn-during-internet-outage,
title = {Microsoft Teams Phone architecture and licensing: source note teamsphone-sba-preserves-pstn-during-internet-outage},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teamsphone-sba-preserves-pstn-during-internet-outage},
note = {Source note teamsphone-sba-preserves-pstn-during-internet-outage, checked 2026-09-06}
}