Learn how to configure Microsoft Teams Phone to route unassigned calls to a custom audio message using the correct number treatment option.
Table of Contents
Question
You have a Microsoft Teams Phone deployment.
You need to route unassigned calls to play an audio message.
To what should you route the number treatment?
Select only one answer.
A. Announcement
B. User
C. Resource Account
D. $null
Answer
To route unassigned calls in Microsoft Teams Phone to play an audio message, you should configure the Announcement option.
A. Announcement
Explanation
The target must be set to Announcement to play an audio message. The other options will not play an audio message.
When configuring unassigned number treatments in Microsoft Teams, the Announcement option allows administrators to upload a custom audio file (e.g., a WAV file) that plays to callers when they dial an unassigned number. This feature is designed to provide a professional and informative message instead of leaving callers with silence or a generic error tone.
Announcement Service: This routes calls to a pre-recorded audio file, which plays once and then disconnects the call.
Implementation:
- In the Teams Admin Center, navigate to Voice > Phone Numbers > Routing Rules, and select “Greeting” as the routing option.
- Using PowerShell, the New-CsTeamsUnassignedNumberTreatment cmdlet specifies -TargetType Announcement and references the audio file’s GUID.
Prerequisites: Ensure Communications Credits are available for Calling Plan numbers and the audio file meets Teams’ format requirements.
Other options like User or Resource Account redirect calls to individuals or automated systems (e.g., Auto Attendants/Call Queues), which do not fulfill the requirement to play a static message. The $null option is invalid in this context.
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