call drops as soon as the receiver answers the call

Question

call drops as soon as the receiver answers the call

Souren Dadaian 5

when making calls using mobile app or desktop app, as in ringing numbers using Teams, call drops as soon as the receiver answers the call, in teams admin center we see an error

( Response code: 406 00:00:01 )

this does not happen to all numbers we call but only a few numbers.

Any ideas?

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Answer 1

Nam-D 230 Microsoft External Staff Moderator

Dear @Souren Dadaian,

Thank you for reaching out to Microsoft Q&A forum.

I understand you're experiencing an issue with outbound calls in Microsoft Teams when trying to dial a phone number. To assist you more effectively, could you please help confirm the following details:

Was this feature working normally before? If so, when did the issue first occur?
Is the issue affecting all users in your organization or only specific individuals?
What is the country code of the number you're trying to call? Are inbound calls working as expected?
Does the issue occur on both the Teams desktop app and the web version?
If possible, please provide a screenshot of the error message from the Teams admin center. Kindly ensure that any personal or sensitive information is hidden before sharing.

I am looking forward to your response so we can do our best to identify the issue.
Thank you for your patience and understanding.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Souren Dadaian 5 Reputation points

2025-10-23T13:11:14.8766667+00:00

Hi,

Problem has just started, it has been working fine for a long time over a year or more, suddenly we have issues with some UK numbers, mobile and landline ! some numbers work fine, very random.

we haven't tested everyone just a few users, I did a test myself and called one of the numbers, it got disconnected within a second as soon as the receiver answered.

It happens on both desktop app and mobile app
Nam-D 230 Reputation points Microsoft External Staff Moderator

2025-10-23T13:58:43.8566667+00:00
Dear @Souren Dadaian,

Thank you for your update.

Based on your information, your issue needs to be investigated from the backend. However, as a Microsoft moderator, we do not have access to backend tool. Therefore, Microsoft technical support engineer will need to step in to verify the Teams configurations, and run any necessary synchronization tools to recognize the problem. If the issue requires further attention, they will escalate it to higher-level team to trace logs for deeper analysis.

To submit a new service request to Microsoft Support, you will need to:

Go to the admin center at https://admin.cloud.microsoft. If you get a message that says you don't have permission to access this page or perform this action, you aren't an admin. For more information, see Who has admin permissions in my business?.

On the bottom right side of the page, select Help & support.

Type a question or keyword into the text box. If you get a drop-down list, select the one closest to your question, or continue typing your question, then press Enter.

If the results don't help, at the bottom, select Contact Support.

Enter a description of your issue, confirm your contact number and email address, select your preferred contact method, and then select Contact me. The expected wait time is indicated in the Contact support pane.
Souren Dadaian 5 Reputation points

2025-10-23T14:21:49.56+00:00

we done all these, thats why I came here in case someone had a good idea about trying to resolve the issue.
Nam-D 230 Reputation points Microsoft External Staff Moderator

2025-10-24T15:15:28.11+00:00

Dear @Souren Dadaian,

Thank you for sharing that, and we truly appreciate your efforts in trying to resolve the issue. Since you've already explored available options and reached out to support, the best course now is to allow the backend team some time to investigate further. These issues can sometimes take a bit of time to diagnose and resolve thoroughly.

We understand it can be frustrating to wait, but rest assured the team is working to get to the bottom of it. In the meantime, if any new details or observations come up on your end, feel free to share with the team.

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call drops as soon as the receiver answers the call

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