Calling PSTN numbers from Bot

Question

Hello,

I m trying to initiate a call from bot and having issues with calling PSTN numbers. The bot is calling perfectly Teams user, playing media files and receiving notifications via subscribed callback function, but calling PSTN number failed with terminated call as shown in the screenshot. Application instance is also defined and the phone number is assigned to the bot.

Is there anything I am missing here?

Answer 1

Update:

This is detailed notification received by callback function:

{
"@odata.type":"#microsoft.graph.commsNotifications",
"value":[
{
"@odata.type":"#microsoft.graph.commsNotification",
"changeType":"deleted",
"resource":"/app/calls/b31f5e00-1104-4367-9684-2605bedf588f",
"resourceUrl":"/communications/calls/b31f5e00-1104-4367-9684-2605bedf588f",
"resourceData":{
"@odata.type":"#microsoft.graph.call",
"state":"terminated",
"resultInfo":{
"@odata.type":"#microsoft.graph.resultInfo",
"code":500,
"subcode":560500,
"message":"Server Internal Error. DiagCode: 500#560500.@"
},
"callChainId":"c9f6735e-7f6f-4640-9c65-2cddf86f4b4f",
"terminationSender":{
"@odata.type":"#microsoft.graph.identitySet",
"phone":{
"@odata.type":"#microsoft.graph.identity",
"id":"+4512345678",
"displayName":"TelDispName",
"identityProvider":"None"
}
}
}
}
]
}

Answer 2

Problem solved with proper use of SBC based phone number.
:-)