In the State property of the Call object, the status does not change when the call is answered and when it is not answered.

Question

You are trying to make a call to Teams using the Graph API.
If there are multiple destinations, we are trying to call them in order, A → B → C.

In this case, we want to call B if A does not answer.
However, when I look at the state property of the Call object,
the value is the same as "established" for the case where A answered and the case where A did not answer,
so I cannot make a judgment. Is there any way to determine this?

Also, is there any way to control how long the call is kept open until it is answered?
I think the standard is 30 seconds, but I would like to make it longer than that.

Answer 1

You need to Redirect an incoming call that hasn't been answered or rejected yet.
The current timeout value is 15 seconds for regular scenarios, and 5 seconds for policy-based recording scenarios. It can't be controlled, its by-default.

Thanks,
Prasad Das

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Answer 2

Thank Prasad.

By redirection, you mean the following.
https://learn.microsoft.com/en-us/graph/api/call-redirect?view=graph-rest-1.0&tabs=http

As for what I want to do.

• If there's an answer, play the automated voice.
• If there is no answer, call the next destination.
  So, we want to know first that there was no answer.
  I was able to get the status from Callback, but when there was no answer and time expired,
  it became "establishing", "established", "established", and "terminated".

Answer 3

Additional Notes.

Sometimes you can get Terminated, sometimes you can't.