Source note · Remote site survivability patterns

SBA does not support Emergency Call Routing Policies. Emergency dial strings skip normalization and are sent without a leading +, so emergency calls through the SBA fail unless the regular voice routing policy has a matching pattern.

Checked 2026-09-24

SBA does not support Emergency Call Routing Policies.

Vendor: Microsoft
Product: Teams Phone Direct Routing
Subsystem: survivable-branch-appliance
Deployment: multi-tenant
Region: not restricted
Release range: current as of 2026-09-24
Checked: 2026-09-24

Sources

Survivable Branch Appliance for Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · Known issues and considerations

Cite this note

APA

WarmTransfer. (2026, September 24). Remote site survivability patterns: source note survivability-remote-site-sba-no-emer-policy. WarmTransfer. https://warmtransfer.net/knowledge/claims/survivability-remote-site-sba-no-emer-policy

BibTeX

@misc{warmtransfer-claim-survivability-remote-site-sba-no-emer-policy,
  title  = {Remote site survivability patterns: source note survivability-remote-site-sba-no-emer-policy},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/survivability-remote-site-sba-no-emer-policy},
  note   = {Source note survivability-remote-site-sba-no-emer-policy, checked 2026-09-24}
}

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