How can I prevent call going to voicemail if enable.

When receiving a call if it is timed out or rejected then it goes to voicemail and terminate notification comes after 5mins. I want to ditect this and terminate the call straightaway. The sample is taken from Graph Api docs. Microsoft IVR already doing this but I could not find any resources related to this. Could someone please tell me how to do this? Thanks.

`POST https://graph.microsoft.com/v1.0/communications/calls
Content-Type: application/json

{
"@odata.type": "#microsoft.graph.call",
"callbackUri": "https://bot.contoso.com/callback",
"targets": [
{
"@odata.type": "#microsoft.graph.invitationParticipantInfo",
"identity": {
"@odata.type": "#microsoft.graph.identitySet",
"user": {
"@odata.type": "#microsoft.graph.identity",
"displayName": "John",
"id": "112f7296-5fa4-42ca-bae8-6a692b15d4b8"
}
}
}
],
"requestedModalities": [
"audio"
],
"mediaConfig": {
"@odata.type": "#microsoft.graph.serviceHostedMediaConfig"
}
}`

The issue names a Microsoft Graph communications call POST using callbackUri, targets, requestedModalities, and serviceHostedMediaConfig, but no repository file or test. Start by reviewing the relevant Graph communications call documentation and the callback behavior described there. Done means documenting or implementing a supported way to detect the timeout or rejection and terminate promptly, if the API permits it.