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Microsoft

MS-721 · Question #58

You have a Microsoft Teams deployment and an existing telephony solution that provides PSTN capability to on-premises third-party PBX systems in two separate locations. You need to implement a redunda

The correct answer is A. highly available Session Border Controllers (SBCs) C. PSTN usages D. voice routing policies. To implement a redundant Direct Routing PSTN solution that uses existing carrier services and survives component failures, you need: (A) Highly available SBCs - deploying multiple SBCs (paired or load-balanced) ensures that if one SBC fails, calls are routed through another; (C)

Implement and configure Teams Phone

Question

You have a Microsoft Teams deployment and an existing telephony solution that provides PSTN capability to on-premises third-party PBX systems in two separate locations. You need to implement a redundant PSTN solution for Microsoft Teams Phone. The solution must use the existing telephony carrier services. The solution must ensure that outbound calls can be made if a component fails. Which three components should you implement? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.

Options

  • Ahighly available Session Border Controllers (SBCs)
  • Bcalling policies
  • CPSTN usages
  • Dvoice routing policies
  • Etenant dial plans

How the community answered

(58 responses)
  • A
    81% (47)
  • B
    14% (8)
  • E
    5% (3)

Explanation

To implement a redundant Direct Routing PSTN solution that uses existing carrier services and survives component failures, you need: (A) Highly available SBCs - deploying multiple SBCs (paired or load-balanced) ensures that if one SBC fails, calls are routed through another; (C) PSTN usages - these are the bridge between voice routing policies and the PSTN routes/SBC trunks, and you must define them to enable routing through the SBCs; (D) Voice routing policies - these policies assign PSTN usages to users, determining which routes (and therefore which SBCs) are used for outbound calls, and can be configured with fallback routes for redundancy. Calling policies (B) control features like private calling or call forwarding, not PSTN routing. Tenant dial plans (E) normalize dialed numbers but do not themselves provide routing or redundancy.

Topics

#Teams Phone#Direct Routing#PSTN Redundancy#SBC

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