Exam MS-721 topic 1 question 172 discussion

Actual exam question from Microsoft's MS-721

Question #: 172
Topic #: 1

You have a Microsoft Teams Phone deployment.

You are deploying Direct Routing.

All users have a SIP URI in the format of [email protected]. The Session Border Controller (SBC) is named sbc.voice.contoso.com.

When troubleshooting errors on the SBC, you receive the warning shown in the following exhibit.

What is a possible cause of the issue?

A. Media bypass is disabled on the SBC
B. The firewall blocks inbound traffic on port 443 to the SBC
C. The firewall blocks traffic to the signaling port on the SBC
D. The firewall blocks outbound traffic on port 443 to Microsoft Teams

Show Suggested Answer

Suggested Answer: C 🗳️

by crabb63 at Jan. 20, 2025, 5:23 p.m.

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kitty73

1 week ago

Selected Answer: C

..."possible cause for this issue might be firewall rules that are preventing incoming traffic. Make sure that firewall rules are configured to allow incoming connections from all SIP proxy signalling IP addresses."... Source link: https://learn.microsoft.com/en-us/troubleshoot/microsoftteams/phone-system/direct-routing/sip-options-tls-certificate-issues

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