Cannot initiate PSTN calls from bot

Hi everybody,

within my calling bot I try to initiate a PSTN call like https://docs.microsoft.com/en-us/graph/api/application-post-calls?view=graph-rest-1.0&tabs=http#example-8-create-peer-to-peer-pstn-call-with-application-hosted-media or invite a PSTN as new participant to an Existing call like https://docs.microsoft.com/en-us/graph/api/participant-invite?view=graph-rest-1.0&tabs=http#example-4-invite-one-pstn-participant-to-an-existing-group-call

I always get following exception:

InternalServerError
Microsoft.Graph.ServiceException: Code: 9999
Message: Unknown internal server error.
Inner error:
AdditionalData:
date: 2021-10-26T10:15:50
request-id: 58538d09-d622-4d61-854e-61606e0f6530
client-request-id: 58538d09-d622-4d61-854e-61606e0f6530
ClientRequestId: 58538d09-d622-4d61-854e-61606e0f6530

at Microsoft.Graph.HttpProvider.SendAsync(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationToken cancellationToken)
at Microsoft.Graph.BaseRequest.SendRequestAsync(Object serializableObject, CancellationToken cancellationToken, HttpCompletionOption completionOption)
at Microsoft.Graph.BaseRequest.SendAsync[T](Object serializableObject, CancellationToken cancellationToken, HttpCompletionOption completionOption)
at RC_MsGraphLink.Controllers.GraphApi.GraphHandler.MakeCall(InvitationParticipantInfo device) in C:\Users\GeW\Documents\tfshome\GLOBAL\MAIN\RC_MsGraphLink\RC_MsGraphLink\Controllers\GraphApi\GraphHandlerCallControl.cs:line 45

My bot has assigned a PSTN number and could be called from extern. Everything also works fine if I try the scenarios with MS Teams Users.

We also followed the instrucions from https://docs.microsoft.com/en-us/graph/cloud-communications-phone-number#assign-a-phone-number-to-your-bot

Any ideas?

Thanks for yout help.

Regards

Gerd

developer

microsoft teams

MS Graph

relkniw
Nov 08, 2021
We could solve the problem. We used the wrong object ID for creating the call. After using the object ID from the assigned service user, it works.

Nivedipa-MSFT
Microsoft
Oct 26, 2021
relkniw

We are looking into the issue.We will update you

Thanks,

Nivedipa

------------------------------------------------------------------------------------------------------------------------

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- relkniw
  Brass Contributor
  Nov 03, 2021
  Nivedipa-MSFTHi Nivedipa,
  
  I could solve the "InternalServerError" by using following c# code:
  
  AdditionalData = new Dictionary<string, object>()
  {
  {"phone", new Identity() { Id = pDevice} }
  }
  
  instad of
  
  AdditionalData = new Dictionary<string, object>()
  {
  {"phone", "{\"@odata.type\":\"#microsoft.graph.identity\",\"id\":\"+12345678901\"}"}
  }
  
  But now I have annother problem: After sending the MakeCall Request I get an establishing Event and immediately an Terminated Event with an Error:
  
  "value": [
  {
  "changeType": "Updated",
  "resourceUrl": "/communications/calls/911f6100-723b-400b-9053-893f686f3131",
  "resource": "/app/calls/911f6100-723b-400b-9053-893f686f3131",
  "resourceData": {
  "@odata.type": "#microsoft.graph.call",
  "state": "establishing",
  "callChainId": "ef0c7f6a-974b-4700-8525-d74fe4d924c2"
  },
  "@odata.type": "#microsoft.graph.commsNotification"
  }
  ],
  "@odata.type": "#microsoft.graph.commsNotifications"
  }
  
  {
  "value": [
  {
  "changeType": "Deleted",
  "resourceUrl": "/communications/calls/911f6100-723b-400b-9053-893f686f3131",
  "resource": "/app/calls/911f6100-723b-400b-9053-893f686f3131",
  "resourceData": {
  "@odata.type": "#microsoft.graph.call",
  "state": "terminated",
  "resultInfo": {
  "@odata.type": "#microsoft.graph.resultInfo",
  "code": 500,
  "subcode": 9999,
  "message": "Get Outbound routing - failed getting userId from billedUserMri: 28:d86f4970-a209-46f1-ad06-87137338eac2. DiagCode: 500#510543"
  },
  "callChainId": "ef0c7f6a-974b-4700-8525-d74fe4d924c2",
  "terminationSender": {
  "@odata.type": "#microsoft.graph.identitySet",
  "phone": {
  "@odata.type": "#microsoft.graph.identity",
  "id": "+41*********",
  "displayName": "4:+41*******",
  "identityProvider": "None"
  }
  }
  },
  "@odata.type": "#microsoft.graph.commsNotification"
  }
  ],
  "@odata.type": "#microsoft.graph.commsNotifications"
  }
  
  The service user for the bot has an "Microsoft 365 E3" and a "Microsoft 365 Phone System" license.
  And I am able to make call from a PSTN number to the bot.
  
  Any idea?
  
  Regards
  
  Gerd
  - relkniw
    Brass Contributor
    Nov 08, 2021
    We could solve the problem. We used the wrong object ID for creating the call. After using the object ID from the assigned service user, it works.

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Cannot initiate PSTN calls from bot

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