OPTIONS health

Repeated misses take a trunk out of service. The campus does not invent Microsoft's internal counter.

Sources and go deeper

Same checked list as T08-R01-emergency-calling-is-a-design-gate.html.

Emergency locations, addresses, and routing — Microsoft Learn — last checked 2026-10.
Plan Direct Routing — Microsoft Learn — last checked 2026-10.
Emergency telephone number — Wikipedia — last checked 2026-10. Wikipedia fallback for background. Confirm the vendor page before you change a tenant
Microsoft Teams blog index — Community — last checked 2026-10. Community index for the Microsoft Teams blog. This is the index, not a claim that a post discusses this room

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