You are troubleshooting Direct Routing connectivity. Test-CsDirectRouting reports that the SBC is reachable, but SIP OPTIONS responses are not being received. The SBC logs show that it is sending responses to the source IP of the OPTIONS message, but the responses are not arriving at Microsoft 365. What is the most likely cause?

The SBC's certificate has expired.

The voice routing policy is not assigned to the SBC.

The SBC is sending responses from a different source IP than the one registered in the PSTN gateway.

A company is using Direct Routing with media bypass enabled. They notice that calls work but audio quality is poor. The SBC is in a different region than the users. What is the best way to improve audio quality?

Assign a different voice routing policy.

Disable media bypass so media flows through the Teams Phone service.

You have a voice routing policy that includes a route with two PSTN gateways. The first gateway has priority 1, the second has priority 2. You want to ensure that if the first gateway is unavailable, calls are routed to the second gateway. What is the correct way to configure the route?

Set the second gateway as the 'backup' gateway in the PSTN gateway settings.

Configure the SBC to forward calls to the second gateway if the first is unavailable.

Add both gateways to the same voice route with the appropriate priority values.

Create two separate voice routes, one for each gateway, and assign both to the policy.

A company has Direct Routing deployed with an SBC. They are experiencing intermittent call failures. The SBC logs show 'TLS handshake failed' errors, but only during peak hours. The SBC's certificate is valid and from a public CA. What is the most likely cause?

The SBC is running out of TLS session cache or resources during peak load.

The SBC's certificate is being revoked by the CA.

The voice routing policy is misconfigured.

The Teams Phone service is blocking the SBC's IP address.

Microsoft 365 Certified:Collaboration Communications Systems Engineer Associate

Domain 3Objective 6

Configure and Manage Direct Routing for Teams Phone MS-721 Practice Questions (Page 6)

Part of the Implement and configure Teams Phone domain, which accounts for 30–35% of the MS-721 exam. Microsoft does not publish an official question count, but from its 100-minute exam (~40–65 total, ~12–23 in this domain), expect 2–4 from this objective — we provide 34 practice questions to prepare you well beyond it. (estimate)

34questions here

7free pages

6concepts

30–35%of the exam

Questions 26–30

26expert · hard
You are troubleshooting Direct Routing connectivity. Test-CsDirectRouting reports that the SBC is reachable, but SIP OPTIONS responses are not being received. The SBC logs show that it is sending responses to the source IP of the OPTIONS message, but the responses are not arriving at Microsoft 365. What is the most likely cause?
Select an answer first
27foundation · easy
Which PowerShell cmdlet is used to create a new PSTN gateway for Direct Routing?
Select an answer first
28expert · hard
A company is using Direct Routing with media bypass enabled. They notice that calls work but audio quality is poor. The SBC is in a different region than the users. What is the best way to improve audio quality?
Select an answer first
29expert · hard
You have a voice routing policy that includes a route with two PSTN gateways. The first gateway has priority 1, the second has priority 2. You want to ensure that if the first gateway is unavailable, calls are routed to the second gateway. What is the correct way to configure the route?
Select an answer first
30expert · hard
A company has Direct Routing deployed with an SBC. They are experiencing intermittent call failures. The SBC logs show 'TLS handshake failed' errors, but only during peak hours. The SBC's certificate is valid and from a public CA. What is the most likely cause?
Select an answer first

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Configure and Manage Direct Routing for Teams Phone MS-721 Practice Questions (Page 6)

Questions 26–30

Which PowerShell cmdlet is used to create a new PSTN gateway for Direct Routing?

A company is using Direct Routing with media bypass enabled. They notice that calls work but audio quality is poor. The SBC is in a different region than the users. What is the best way to improve audio quality?

You have a voice routing policy that includes a route with two PSTN gateways. The first gateway has priority 1, the second has priority 2. You want to ensure that if the first gateway is unavailable, calls are routed to the second gateway. What is the correct way to configure the route?

A company has Direct Routing deployed with an SBC. They are experiencing intermittent call failures. The SBC logs show 'TLS handshake failed' errors, but only during peak hours. The SBC's certificate is valid and from a public CA. What is the most likely cause?

Keep studying — Implement and configure Teams Phone