Exam MS-720 topic 3 question 20 discussion

Actual exam question from Microsoft's MS-720

Question #: 20
Topic #: 3

DRAG DROP -
Your company has a main office in New York and a branch office in Calgary. All offices connect to each other by using a dedicated WAN.
You have a Microsoft Teams Phone deployment.
You need to recommend a Direct Routing solution that meets the following requirements:
✑ If a Session Border Controller (SBC) fails in the New York office, PSTN services must remain available through a local PSTN egress in New York.
✑ The Calgary office must prioritize a local PSTN egress and ensure that PSTN services remain available in the event of a local SBC outage.
✑ The number of SBCs must be minimized.
What should you recommend for each office? To answer, drag the appropriate components to the correct offices. Each component may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:

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Suggested Answer:

by dariomws at Jan. 18, 2023, 9:41 a.m.

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dariomws

Highly Voted 2 years, 5 months ago

A single SBC in Calgary with two voice routes (VR1 and VR2). VR1 first priority to route calls to local SBC, VR2 lower priority to route calls to New York SBC.

upvoted 5 times

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TheMCT

Most Recent 2 years, 4 months ago

New York: A local redundant SBC pair Calgary: A single SBC

upvoted 2 times

Chris7910

2 years ago

How does a single sbc helps when there is an outtage?

upvoted 2 times

Cp6uja

1 year, 6 months ago

You can deploy a single SBC since the priority is local PSTN egress, but with a need to maintain service availability in case of an SBC outage. In the event of a local SBC failure, the Calgary office can failover to use the SBCs in the New York office. This approach aligns with minimising the number of SBCs while ensuring service continuity.

upvoted 1 times

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