call: answer

Namespace: microsoft.graph

Important

APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.

Enable a bot to answer an incoming call. The incoming call request can be an invite from a participant in a group call or a peer-to-peer call. If an invite to a group call is received, the notification will contain the chatInfo and meetingInfo parameters.

The bot is expected to answer, reject or redirect the call before the call times out. The current timeout value is 15 seconds. The current timeout value is 15 seconds for regular scenarios, and 5 seconds for policy-based recording scenarios.

Permissions

You do not need any permissions to answer a peer-to-peer call. You need one of the following permissions to join a group call. To learn more, including how to choose permissions, see Permissions.

Permission type Permissions (from least to most privileged)
Delegated (work or school account) Not supported.
Delegated (personal Microsoft account) Not supported.
Application Calls.JoinGroupCall.All, Calls.JoinGroupCallAsGuest.All

Note: For a call that uses application-hosted media, you also need the Calls.AccessMedia.All permission. You must have at least one of the following permissions to ensure that the source in the incoming call notification is decrypted: Calls.AccessMedia.All, Calls.Initiate.All, Calls.InitiateGroupCall.All, Calls.JoinGroupCall.All, Calls.JoinGroupCallAsGuest.All. The source is the caller info in the incoming call notification. Without at least one of these permissions, the source will remain encrypted.

HTTP request

POST /app/calls/{id}/answer
POST /communications/calls/{id}/answer

Note: The /app path is deprecated. Going forward, use the /communications path.

Request headers

Name Description
Authorization Bearer {token}. Required.
Content-type application/json. Required.

Request body

In the request body, provide a JSON object with the following parameters.

Parameter Type Description
callbackUri String Allows bots to provide a specific callback URI for the concurrent call to receive later notifications. If this property has not been set, the bot's global callback URI will be used instead. This must be https.
acceptedModalities String collection The list of accept modalities. Possible value are: audio, video, videoBasedScreenSharing. Required for answering a call.
callOptions incomingCallOptions The call options.
mediaConfig appHostedMediaConfig or serviceHostedMediaConfig The media configuration. Required.
participantCapacity Int The number of participant that the application can handle for the call, for Teams policy-based recording scenario.

Response

This method returns a 202 Accepted response code.

Examples

The following example shows how to call this API.

Request

The following example shows the request.

POST https://graph.microsoft.com/beta/communications/calls/{id}/answer
Content-Type: application/json
Content-Length: 211

{
  "callbackUri": "callbackUri-value",
  "mediaConfig": {
    "@odata.type": "#microsoft.graph.appHostedMediaConfig",
    "blob": "<Media Session Configuration Blob>"
  },
  "acceptedModalities": [
    "audio"
  ],
  "callOptions": {
    "@odata.type": "#microsoft.graph.incomingCallOptions",
    "isContentSharingNotificationEnabled": true
  },
  "participantCapacity": 200
}

Response

Here is an example of the response.

HTTP/1.1 202 Accepted

Example 1: Answer a Peer-to-Peer VoIP call with service hosted media

Notification - incoming

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "created",
      "resourceUrl": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
      "resourceData": {
        "@odata.type": "#microsoft.graph.call",
        "@odata.id": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
        "@odata.etag": "W/\"5445\"",
        "state": "incoming",
        "direction": "incoming",
        "callRoutes": [
          {
            "routingType": "lookup",
            "original": {
              "phone": {
                "id": "+14258828080"
              }
            },
            "final": {
              "user": {
                "id": "29362BD4-CD58-4ED0-A206-0E4A33DBB0B6",
                "displayName": "Heidi Steen"
              }
            }
          }
        ],
        "source": {
          "identity": {
            "user": {
              "displayName": "Test User",
              "id": "8A34A46B-3D17-4ADC-8DCE-DC4E7D572698"
            }
          },
          "region": "westus",
          "languageId": "en-US"
        },
        "targets": [
          {
            "identity": {
              "application": {
                "displayName": "Test BOT",
                "id": "8A34A46B-3D17-4ADC-8DCE-DC4E7D572698"
              }
            },
            "languageId": "en-US"
          }
        ],
        "requestedModalities": [ "audio" ]
      }
    }
  ]
}

Request

POST /communications/calls/57DAB8B1894C409AB240BD8BEAE78896/answer
Content-Type: application/json

{
  "callbackUri": "https://bot.contoso.com/api/calls",
  "acceptedModalities": [ "audio" ],
  "mediaConfig": {
    "@odata.type": "#microsoft.graph.serviceHostedMediaConfig",
    "preFetchMedia": [
      {
        "uri": "https://cdn.contoso.com/beep.wav",
        "resourceId": "1D6DE2D4-CD51-4309-8DAA-70768651088E"
      },
      {
        "uri": "https://cdn.contoso.com/cool.wav",
        "resourceId": "1D6DE2D4-CD51-4309-8DAA-70768651088F"
      }
    ]
  }
}

Response

HTTP/1.1 202 Accepted

Notification - establishing

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "updated",
      "resourceUrl": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
      "resourceData": {
        "@odata.type": "#microsoft.graph.call",
        "@odata.id": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
        "@odata.etag": "W/\"5445\"",
        "state": "establishing"
      }
    }
  ]
}

Notification - established

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "updated",
      "resourceUrl": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
      "resourceData": {
        "@odata.type": "#microsoft.graph.call",
        "@odata.id": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
        "@odata.etag": "W/\"5445\"",
        "state": "established"
      }
    }
  ]
}

Example 2: Answer VOIP call with application hosted media

Notification - incoming

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "created",
      "resourceUrl": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
      "resourceData": {
        "@odata.type": "#microsoft.graph.call",
        "@odata.id": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
        "@odata.etag": "W/\"5445\"",
        "state": "incoming",
        "direction": "incoming",
        "source": {
          "@odata.type": "#microsoft.graph.participantInfo",
          "identity": {
            "user": {
              "displayName": "Test User",
              "id": "8A34A46B-3D17-4ADC-8DCE-DC4E7D572698"
            }
          },
          "region": "westus",
          "languageId": "en-US"
        },
        "targets": [
          {
            "@odata.type": "#microsoft.graph.invitationParticipantInfo",
            "identity": {
              "application": {
                "displayName": "Test BOT",
                "id": "8A34A46B-3D17-4ADC-8DCE-DC4E7D572698"
              }
            },
            "region": "westus",
            "languageId": "en-US"
          }
        ],
        "requestedModalities": [ "audio" ]
      }
    }
  ]
}

Request

POST /communications/calls/57DAB8B1894C409AB240BD8BEAE78896/answer
Content-Type: application/json

{
  "callbackUri": "https://bot.contoso.com/api/calls",
  "acceptedModalities": [ "audio" ],
  "mediaConfig": {
    "@odata.type": "#microsoft.graph.appHostedMediaConfig",
    "blob": "<Media Session Configuration Blob>"
  }
}

Response

HTTP/1.1 202 Accepted

Notification - establishing

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "updated",
      "resourceUrl": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
      "resourceData": {
        "@odata.type": "#microsoft.graph.call",
        "@odata.id": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
        "@odata.etag": "W/\"5445\"",
        "state": "establishing"
      }
    }
  ]
}

Notification - established

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "updated",
      "resourceUrl": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
      "resourceData": {
        "@odata.type": "#microsoft.graph.call",
        "@odata.id": "/communications/calls/57DAB8B1894C409AB240BD8BEAE78896",
        "@odata.etag": "W/\"5445\"",
        "state": "established"
      }
    }
  ]
}

Notification - content sharing started

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "created",
      "resourceUrl": "/communications/calls/421f4c00-4436-4c3a-9d9a-c4924cf98e67/contentsharingsessions/2765eb15-01f8-47c6-b12b-c32111a4a86f"
    }
  ]
}

Notification - content sharing ended

POST https://bot.contoso.com/api/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
    {
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "deleted",
      "resourceUrl": "/communications/calls/421f4c00-4436-4c3a-9d9a-c4924cf98e67/contentsharingsessions/2765eb15-01f8-47c6-b12b-c32111a4a86f"
    }
  ]
}

Example 3: Answer a policy-based recording call

Under the Policy-based recording scenario, before a participant under policy joins a call, an incoming call notification will be sent to the bot associated with the policy. The join information can be found under the botData property. The bot can then choose to answer the call and update the recording status accordingly.

When participantCpapacity is specified in the Answer request for a policy-based recording notification, subsequent participant joining event belonging to the same policy group will be sent out as participantJoiningNotification instead of new incoming call notification, until number of participants that current call instance is handling has reached the number specified in participantCapacity.

The following is an example of the incoming call notification that a bot would recieve in this case.

{
   "@odata.type":"#microsoft.graph.commsNotifications",
   "value":[
      {
         "@odata.type":"#microsoft.graph.commsNotification",
         "changeType":"created",
         "resource":"/app/calls/e71f0300-9c1f-4d99-b5f4-2722e877d497",
         "resourceUrl":"/communications/calls/e71f0300-9c1f-4d99-b5f4-2722e877d497",
         "resourceData":{
            "@odata.type":"#microsoft.graph.call",
            "state":"incoming",
            "direction":"incoming",
            "source":{
               "@odata.type":"#microsoft.graph.participantInfo",
               "id":"90fad2ce-8989-41a1-8a66-f6636e629a2a",
               "identity":{
                  "@odata.type":"#microsoft.graph.identitySet",
                  "user":{
                     "@odata.type":"#microsoft.graph.identity",
                     "id":"8A34A46B-3D17-4ADC-8DCE-DC4E7D572698",
                     "identityProvider":"AAD"
                  }
               },
               "endpointType":"default",
               "region":"amer"
            },
            "targets":[
               {
                  "@odata.type":"#microsoft.graph.invitationParticipantInfo",
                  "identity":{
                     "@odata.type":"#microsoft.graph.identitySet",
                     "applicationInstance":{
                        "@odata.type":"#microsoft.graph.identity",
                        "id":"832899f8-2ea1-4604-8413-27bd2892079f",
                        "identityProvider":"AAD"
                     }
                  },
                  "endpointType":"default",
                  "id":"4520a1a5-5394-5a41-aa12-9ee6fa18cfc8",
                  "region":null,
                  "languageId":null
               }
            ],
            "meetingInfo":{
               "@odata.type":"#microsoft.graph.tokenMeetingInfo",
               "token":"join token"
            },
            "tenantId":"932899f8-2ea1-4604-8413-27bd2892079f",
            "myParticipantId":"1520a1a5-5394-4a41-aa72-9ee6fa18cfc8",
            "callChainId":"05f2f70f-3a9c-47c1-80a9-cc79e91d8cec",
            "incomingContext":{
               "@odata.type":"#microsoft.graph.incomingContext",
               "sourceParticipantId":"30fad2ce-8989-41a1-8a66-f6636e629a2a",
               "observedParticipantId":"30fad2ce-8989-41a1-8a66-f6636e629a2a"
            },
            "id":"e71f0300-9c1f-4d99-b5f4-2722e877d497",
            "applicationMetadata":{
               "botData":{
                  "mediaHostedRegion":"USEA",
                  "user":{
                     "participationMethod":"callee",
                     "clientLocation":"US"
                  },
                  "otherSideUser":{
                     "id":"971f0300-9c1f-4d99-b5f4-2722e877d490",
                     "participantId":"3520a1a5-5394-4a41-aa72-9ee6fa18cfc8",
                     "tenantId":"1540a1a5-2394-4a41-aa72-9ee6fa18cfc8",
                     "onBehalfOf":{
                        "id":"871f0300-9c1f-4d99-b5f4-2722e877d490"
                     },
                     "participationMethod":"caller",
                     "clientLocation":"EUNO"
                  },
                  "inviteReasons":[
                     "PolicyBasedRecording"
                  ],
                  "policyIdentifier":"Test Policy",
                  "pairedRecorders":[
                     {
                        "id":"471f0300-5c1f-4d99-b5f4-2722e877d490",
                        "participantId":"371f0300-2c1f-4d99-b5f4-2722e877d490"
                     }
                  ],
                  "otherRecorders":[
                     {
                        "id":"671f0300-9c1f-4d99-b5f4-2722e877d490",
                        "participantId":"a71f0300-ec1f-4d99-b5f4-2722e877d490"
                     }
                  ]
               }
            }
         }
      }
   ]
}