You have a Microsoft Teams Phone deployment that is used in the United States. You need to ensure that emergency calls placed to 9911 are routed to 911. What should you configure?

Question

Options

• Aan outbound PSTN number translation rule
• Ba dial plan normalization rule
• Can emergency call routing policy
• Dan emergency calling policy

• A
  82% (27)
• B
  9% (3)
• C
  3% (1)
• D
  6% (2)

Explanation

Option A is correct because an outbound PSTN number translation rule transforms the dialed number before it leaves Teams - so when a user dials 9911, the rule strips the leading 9 and sends 911 to the PSTN carrier. This is a number manipulation function, not a policy or routing decision.

Why the distractors are wrong:

• B (dial plan normalization rule) normalizes numbers into E.164 format for internal Teams routing - it's not designed to manipulate outbound PSTN digits at the trunk level.
• C (emergency call routing policy) defines which emergency numbers are recognized and which PSTN gateway to use - it doesn't rewrite the dialed digits.
• D (emergency calling policy) controls who gets notified and what happens during an emergency call (e.g., security desk alerts) - again, no digit translation.

Memory tip: Think of PSTN translation rules as a "find and replace" for digits going out to the phone network. Any time the question involves fixing a mis-dialed or prefixed number before it hits the carrier, the answer is a translation rule.

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