Discover why implementing a dial plan is critical for configuring location-specific dialing requirements in Microsoft Teams Phone deployments. Learn expert insights for the MS-721 exam.
Table of Contents
Question
You have a Microsoft Teams Phone deployment that has offices in three locations. Each location has specific requirements on how numbers are dialed for Teams calls.
You plan to open an office in a fourth location.
You need to recommend a solution to ensure that the unique dialing requirements are configured for the new location.
What should you include in the recommendation?
Select only one answer.
A. a dial plan
B. a routing rule for unassigned numbers
C. a voice application policy
D. a voice routing policy
Answer
To address the unique dialing requirements of a new office in a Microsoft Teams Phone deployment, the correct recommendation is A. a dial plan.
A. a dial plan
Explanation
A dial plan is needed in the new location to provide the unique dialing requirements for how calls are dialed for Teams Phone.
A dial plan is a set of normalization rules that translate dialed numbers into a standardized format (typically E.164) for call routing and authorization. For multi-location deployments, tenant-scoped dial plans allow organizations to:
- Define location-specific external dialing prefixes (e.g., “9” for external lines).
- Create normalization rules for local number formats, area codes, or international dialing patterns.
- Augment the default service-scoped dial plan (assigned based on user location) with custom rules for the new office.
How Dial Plans Address the Scenario
- Location-Specific Customization: Each office can have a dedicated tenant dial plan with rules tailored to its dialing habits (e.g., translating “0” to a full international prefix).
- Effective Dial Plan Composition: Teams combines the service country/region dial plan with the tenant dial plan, avoiding redundant rule creation.
- Centralized Management: Admins assign dial plans via the Teams admin center or PowerShell, ensuring consistency across locations.
Why Other Options Are Incorrect
- B. Routing rule for unassigned numbers: Handles calls to unassigned numbers (e.g., forwarding to a receptionist), not dialing behavior.
- C. Voice application policy: Governs features like voicemail or call queues, not number translation.
- D. Voice routing policy: Directs calls through specific PSTN gateways in Direct Routing deployments but doesn’t modify dialed numbers.
For the MS-721 exam, focus on dial plans as the primary tool for configuring location-specific dialing requirements in Teams.
Key Takeaway: Dial plans enable granular control over number normalization, ensuring compliance with local dialing conventions while integrating seamlessly with Teams’ voice infrastructure.
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