Source note · SIP trunk redundancy and failover design
PSTN usages in a Teams voice routing policy are evaluated in order, and once a match is found in one usage the later usages are never evaluated, so a catch-all usage placed first bypasses backup routes defined in a later usage.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- call routing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Configure call routing for Direct Routing — Microsoft · tier 2 current vendor documentation · Example 2: Voice routing with multiple PSTN usages, Note under routing table
Cite this note
APA
WarmTransfer. (2026, September 25). SIP trunk redundancy and failover design: source note sip-trunk-redundancy-design-ms-usage-order. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-redundancy-design-ms-usage-order
BibTeX
@misc{warmtransfer-claim-sip-trunk-redundancy-design-ms-usage-order,
title = {SIP trunk redundancy and failover design: source note sip-trunk-redundancy-design-ms-usage-order},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-redundancy-design-ms-usage-order},
note = {Source note sip-trunk-redundancy-design-ms-usage-order, checked 2026-09-25}
}