call: answer

Article
2024-10-23

Namespace: microsoft.graph

Enable a bot to answer an incoming call. The incoming call request can be an invitation from a participant in a group call or a peer-to-peer call. If an invitation to a group call is received, the notification contains 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 for regular scenarios and 5 seconds for policy-based recording scenarios.

This API supports the following PSTN scenarios:

Incoming call to bot's PSTN number and then bot invites another PSTN.
Incoming call to bot's PSTN number and then bot transfer to another PSTN.
Incoming call to bot's PSTN number and then bot redirects to another PSTN.
Incoming call to bot's instance identifier and then bot invites another PSTN.
Incoming call to bot's instance identifier and then bot transfer to another PSTN.
Incoming call to bot's instance identifier and then bot redirects to another PSTN.
Incoming call to bot's instance identifier from Scheduled Meeting and then bot invites PSTN.
Outgoing call from bot (with instance identifier) to a PSTN.
P2P call between bot and another peer (Teams user, PSTN), bot invites another PSTN.
P2P call between bot and another peer (Teams user, PSTN), bot invites another Teams user.
Bot join the scheduled meeting and then invite PSTN.

This API is available in the following national cloud deployments.

Global service	US Government L4	US Government L5 (DOD)	China operated by 21Vianet
✅	✅	✅	❌

Permissions

Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.

Permission type	Least privileged permissions	Higher privileged permissions
Delegated (work or school account)	Not supported.	Not supported.
Delegated (personal Microsoft account)	Not supported.	Not supported.
Application	Calls.JoinGroupCall.All	Calls.JoinGroupCallAsGuest.All

HTTP request

POST /communications/calls/{id}/answer

Request headers

Name	Description
Authorization	Bearer {token}. Required. Learn more about authentication and authorization.
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 isn't set, the bot's global callback URI is used instead. I must be `https`.
acceptedModalities	String collection	The list of accepted modalities. Possible values are: `audio`, `video`, `videoBasedScreenSharing`. Required for answering a call.
callOptions	incomingCallOptions	The call options.
mediaConfig	appHostedMediaConfig or serviceHostedMediaConfig	The media configuration. (Required)
participantCapacity	Int32	The number of participants 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/v1.0/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,
    "isDeltaRosterEnabled": true
  },
  "participantCapacity": 200
}


// Code snippets are only available for the latest version. Current version is 5.x

// Dependencies
using Microsoft.Graph.Communications.Calls.Item.Answer;
using Microsoft.Graph.Models;

var requestBody = new AnswerPostRequestBody
{
	CallbackUri = "callbackUri-value",
	MediaConfig = new AppHostedMediaConfig
	{
		OdataType = "#microsoft.graph.appHostedMediaConfig",
		Blob = "<Media Session Configuration Blob>",
	},
	AcceptedModalities = new List<Modality?>
	{
		Modality.Audio,
	},
	CallOptions = new IncomingCallOptions
	{
		OdataType = "#microsoft.graph.incomingCallOptions",
		IsContentSharingNotificationEnabled = true,
		IsDeltaRosterEnabled = true,
	},
	ParticipantCapacity = 200,
};

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
await graphClient.Communications.Calls["{call-id}"].Answer.PostAsync(requestBody);



mgc communications calls answer post --call-id {call-id} --body '{\
  "callbackUri": "callbackUri-value",\
  "mediaConfig": {\
    "@odata.type": "#microsoft.graph.appHostedMediaConfig",\
    "blob": "<Media Session Configuration Blob>"\
  },\
  "acceptedModalities": [\
    "audio"\
  ],\
  "callOptions": {\
    "@odata.type": "#microsoft.graph.incomingCallOptions",\
    "isContentSharingNotificationEnabled": true,\
    "isDeltaRosterEnabled": true\
  },\
  "participantCapacity": 200\
}\
'



// Code snippets are only available for the latest major version. Current major version is $v1.*

// Dependencies
import (
	  "context"
	  msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
	  graphcommunications "github.com/microsoftgraph/msgraph-sdk-go/communications"
	  graphmodels "github.com/microsoftgraph/msgraph-sdk-go/models"
	  //other-imports
)

requestBody := graphcommunications.NewAnswerPostRequestBody()
callbackUri := "callbackUri-value"
requestBody.SetCallbackUri(&callbackUri) 
mediaConfig := graphmodels.NewAppHostedMediaConfig()
blob := "<Media Session Configuration Blob>"
mediaConfig.SetBlob(&blob) 
requestBody.SetMediaConfig(mediaConfig)
acceptedModalities := []graphmodels.Modalityable {
	modality := graphmodels.AUDIO_MODALITY 
	requestBody.SetModality(&modality)
}
requestBody.SetAcceptedModalities(acceptedModalities)
callOptions := graphmodels.NewIncomingCallOptions()
isContentSharingNotificationEnabled := true
callOptions.SetIsContentSharingNotificationEnabled(&isContentSharingNotificationEnabled) 
isDeltaRosterEnabled := true
callOptions.SetIsDeltaRosterEnabled(&isDeltaRosterEnabled) 
requestBody.SetCallOptions(callOptions)
participantCapacity := int32(200)
requestBody.SetParticipantCapacity(&participantCapacity) 

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=go
graphClient.Communications().Calls().ByCallId("call-id").Answer().Post(context.Background(), requestBody, nil)


// Code snippets are only available for the latest version. Current version is 6.x

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

com.microsoft.graph.communications.calls.item.answer.AnswerPostRequestBody answerPostRequestBody = new com.microsoft.graph.communications.calls.item.answer.AnswerPostRequestBody();
answerPostRequestBody.setCallbackUri("callbackUri-value");
AppHostedMediaConfig mediaConfig = new AppHostedMediaConfig();
mediaConfig.setOdataType("#microsoft.graph.appHostedMediaConfig");
mediaConfig.setBlob("<Media Session Configuration Blob>");
answerPostRequestBody.setMediaConfig(mediaConfig);
LinkedList<Modality> acceptedModalities = new LinkedList<Modality>();
acceptedModalities.add(Modality.Audio);
answerPostRequestBody.setAcceptedModalities(acceptedModalities);
IncomingCallOptions callOptions = new IncomingCallOptions();
callOptions.setOdataType("#microsoft.graph.incomingCallOptions");
callOptions.setIsContentSharingNotificationEnabled(true);
callOptions.setIsDeltaRosterEnabled(true);
answerPostRequestBody.setCallOptions(callOptions);
answerPostRequestBody.setParticipantCapacity(200);
graphClient.communications().calls().byCallId("{call-id}").answer().post(answerPostRequestBody);


const options = {
	authProvider,
};

const client = Client.init(options);

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

await client.api('/communications/calls/{id}/answer')
	.post(answer);


<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Communications\Calls\Item\Answer\AnswerPostRequestBody;
use Microsoft\Graph\Generated\Models\AppHostedMediaConfig;
use Microsoft\Graph\Generated\Models\Modality;
use Microsoft\Graph\Generated\Models\IncomingCallOptions;


$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);

$requestBody = new AnswerPostRequestBody();
$requestBody->setCallbackUri('callbackUri-value');
$mediaConfig = new AppHostedMediaConfig();
$mediaConfig->setOdataType('#microsoft.graph.appHostedMediaConfig');
$mediaConfig->setBlob('<Media Session Configuration Blob>');
$requestBody->setMediaConfig($mediaConfig);
$requestBody->setAcceptedModalities([new Modality('audio'),	]);
$callOptions = new IncomingCallOptions();
$callOptions->setOdataType('#microsoft.graph.incomingCallOptions');
$callOptions->setIsContentSharingNotificationEnabled(true);
$callOptions->setIsDeltaRosterEnabled(true);
$requestBody->setCallOptions($callOptions);
$requestBody->setParticipantCapacity(200);

$graphServiceClient->communications()->calls()->byCallId('call-id')->answer()->post($requestBody)->wait();


Import-Module Microsoft.Graph.CloudCommunications

$params = @{
	callbackUri = "callbackUri-value"
	mediaConfig = @{
		"@odata.type" = "#microsoft.graph.appHostedMediaConfig"
		blob = "<Media Session Configuration Blob>"
	}
	acceptedModalities = @(
	"audio"
)
callOptions = @{
	"@odata.type" = "#microsoft.graph.incomingCallOptions"
	isContentSharingNotificationEnabled = $true
	isDeltaRosterEnabled = $true
}
participantCapacity = 200
}

Invoke-MgAnswerCommunicationCall -CallId $callId -BodyParameter $params


# Code snippets are only available for the latest version. Current version is 1.x
from msgraph import GraphServiceClient
from msgraph.generated.communications.calls.item.answer.answer_post_request_body import AnswerPostRequestBody
from msgraph.generated.models.app_hosted_media_config import AppHostedMediaConfig
from msgraph.generated.models.modality import Modality
from msgraph.generated.models.incoming_call_options import IncomingCallOptions
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = AnswerPostRequestBody(
	callback_uri = "callbackUri-value",
	media_config = AppHostedMediaConfig(
		odata_type = "#microsoft.graph.appHostedMediaConfig",
		blob = "<Media Session Configuration Blob>",
	),
	accepted_modalities = [
		Modality.Audio,
	],
	call_options = IncomingCallOptions(
		odata_type = "#microsoft.graph.incomingCallOptions",
		is_content_sharing_notification_enabled = True,
		is_delta_roster_enabled = True,
	),
	participant_capacity = 200,
)

await graph_client.communications.calls.by_call_id('call-id').answer.post(request_body)

Response

The following example shows 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",
        "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"
              }
            }
          }
        ],
        "requestedModalities": [ "audio" ]
      }
    }
  ]
}

Request

POST https://graph.microsoft.com/v1.0/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"
      }
    ]
  }
}


// Code snippets are only available for the latest version. Current version is 5.x

// Dependencies
using Microsoft.Graph.Communications.Calls.Item.Answer;
using Microsoft.Graph.Models;

var requestBody = new AnswerPostRequestBody
{
	CallbackUri = "https://bot.contoso.com/api/calls",
	AcceptedModalities = new List<Modality?>
	{
		Modality.Audio,
	},
	MediaConfig = new ServiceHostedMediaConfig
	{
		OdataType = "#microsoft.graph.serviceHostedMediaConfig",
		PreFetchMedia = new List<MediaInfo>
		{
			new MediaInfo
			{
				Uri = "https://cdn.contoso.com/beep.wav",
				ResourceId = "1D6DE2D4-CD51-4309-8DAA-70768651088E",
			},
			new MediaInfo
			{
				Uri = "https://cdn.contoso.com/cool.wav",
				ResourceId = "1D6DE2D4-CD51-4309-8DAA-70768651088F",
			},
		},
	},
};

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
await graphClient.Communications.Calls["{call-id}"].Answer.PostAsync(requestBody);



mgc communications calls answer post --call-id {call-id} --body '{\
  "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"\
      }\
    ]\
  }\
}\
'



// Code snippets are only available for the latest major version. Current major version is $v1.*

// Dependencies
import (
	  "context"
	  msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
	  graphcommunications "github.com/microsoftgraph/msgraph-sdk-go/communications"
	  graphmodels "github.com/microsoftgraph/msgraph-sdk-go/models"
	  //other-imports
)

requestBody := graphcommunications.NewAnswerPostRequestBody()
callbackUri := "https://bot.contoso.com/api/calls"
requestBody.SetCallbackUri(&callbackUri) 
acceptedModalities := []graphmodels.Modalityable {
	modality := graphmodels.AUDIO_MODALITY 
	requestBody.SetModality(&modality)
}
requestBody.SetAcceptedModalities(acceptedModalities)
mediaConfig := graphmodels.NewServiceHostedMediaConfig()


mediaInfo := graphmodels.NewMediaInfo()
uri := "https://cdn.contoso.com/beep.wav"
mediaInfo.SetUri(&uri) 
resourceId := "1D6DE2D4-CD51-4309-8DAA-70768651088E"
mediaInfo.SetResourceId(&resourceId) 
mediaInfo1 := graphmodels.NewMediaInfo()
uri := "https://cdn.contoso.com/cool.wav"
mediaInfo1.SetUri(&uri) 
resourceId := "1D6DE2D4-CD51-4309-8DAA-70768651088F"
mediaInfo1.SetResourceId(&resourceId) 

preFetchMedia := []graphmodels.MediaInfoable {
	mediaInfo,
	mediaInfo1,
}
mediaConfig.SetPreFetchMedia(preFetchMedia)
requestBody.SetMediaConfig(mediaConfig)

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=go
graphClient.Communications().Calls().ByCallId("call-id").Answer().Post(context.Background(), requestBody, nil)


// Code snippets are only available for the latest version. Current version is 6.x

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

com.microsoft.graph.communications.calls.item.answer.AnswerPostRequestBody answerPostRequestBody = new com.microsoft.graph.communications.calls.item.answer.AnswerPostRequestBody();
answerPostRequestBody.setCallbackUri("https://bot.contoso.com/api/calls");
LinkedList<Modality> acceptedModalities = new LinkedList<Modality>();
acceptedModalities.add(Modality.Audio);
answerPostRequestBody.setAcceptedModalities(acceptedModalities);
ServiceHostedMediaConfig mediaConfig = new ServiceHostedMediaConfig();
mediaConfig.setOdataType("#microsoft.graph.serviceHostedMediaConfig");
LinkedList<MediaInfo> preFetchMedia = new LinkedList<MediaInfo>();
MediaInfo mediaInfo = new MediaInfo();
mediaInfo.setUri("https://cdn.contoso.com/beep.wav");
mediaInfo.setResourceId("1D6DE2D4-CD51-4309-8DAA-70768651088E");
preFetchMedia.add(mediaInfo);
MediaInfo mediaInfo1 = new MediaInfo();
mediaInfo1.setUri("https://cdn.contoso.com/cool.wav");
mediaInfo1.setResourceId("1D6DE2D4-CD51-4309-8DAA-70768651088F");
preFetchMedia.add(mediaInfo1);
mediaConfig.setPreFetchMedia(preFetchMedia);
answerPostRequestBody.setMediaConfig(mediaConfig);
graphClient.communications().calls().byCallId("{call-id}").answer().post(answerPostRequestBody);


const options = {
	authProvider,
};

const client = Client.init(options);

const answer = {
  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'
      }
    ]
  }
};

await client.api('/communications/calls/57DAB8B1894C409AB240BD8BEAE78896/answer')
	.post(answer);


<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Communications\Calls\Item\Answer\AnswerPostRequestBody;
use Microsoft\Graph\Generated\Models\Modality;
use Microsoft\Graph\Generated\Models\ServiceHostedMediaConfig;
use Microsoft\Graph\Generated\Models\MediaInfo;


$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);

$requestBody = new AnswerPostRequestBody();
$requestBody->setCallbackUri('https://bot.contoso.com/api/calls');
$requestBody->setAcceptedModalities([new Modality('audio'),	]);
$mediaConfig = new ServiceHostedMediaConfig();
$mediaConfig->setOdataType('#microsoft.graph.serviceHostedMediaConfig');
$preFetchMediaMediaInfo1 = new MediaInfo();
$preFetchMediaMediaInfo1->setUri('https://cdn.contoso.com/beep.wav');
$preFetchMediaMediaInfo1->setResourceId('1D6DE2D4-CD51-4309-8DAA-70768651088E');
$preFetchMediaArray []= $preFetchMediaMediaInfo1;
$preFetchMediaMediaInfo2 = new MediaInfo();
$preFetchMediaMediaInfo2->setUri('https://cdn.contoso.com/cool.wav');
$preFetchMediaMediaInfo2->setResourceId('1D6DE2D4-CD51-4309-8DAA-70768651088F');
$preFetchMediaArray []= $preFetchMediaMediaInfo2;
$mediaConfig->setPreFetchMedia($preFetchMediaArray);

$requestBody->setMediaConfig($mediaConfig);

$graphServiceClient->communications()->calls()->byCallId('call-id')->answer()->post($requestBody)->wait();


Import-Module Microsoft.Graph.CloudCommunications

$params = @{
	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"
		}
	)
}
}

Invoke-MgAnswerCommunicationCall -CallId $callId -BodyParameter $params


# Code snippets are only available for the latest version. Current version is 1.x
from msgraph import GraphServiceClient
from msgraph.generated.communications.calls.item.answer.answer_post_request_body import AnswerPostRequestBody
from msgraph.generated.models.modality import Modality
from msgraph.generated.models.service_hosted_media_config import ServiceHostedMediaConfig
from msgraph.generated.models.media_info import MediaInfo
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = AnswerPostRequestBody(
	callback_uri = "https://bot.contoso.com/api/calls",
	accepted_modalities = [
		Modality.Audio,
	],
	media_config = ServiceHostedMediaConfig(
		odata_type = "#microsoft.graph.serviceHostedMediaConfig",
		pre_fetch_media = [
			MediaInfo(
				uri = "https://cdn.contoso.com/beep.wav",
				resource_id = "1D6DE2D4-CD51-4309-8DAA-70768651088E",
			),
			MediaInfo(
				uri = "https://cdn.contoso.com/cool.wav",
				resource_id = "1D6DE2D4-CD51-4309-8DAA-70768651088F",
			),
		],
	),
)

await graph_client.communications.calls.by_call_id('call-id').answer.post(request_body)

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"
              }
            }
          }
        ],
        "requestedModalities": [ "audio" ]
      }
    }
  ]
}

Request

POST https://graph.microsoft.com/v1.0/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>"
  }
}


// Code snippets are only available for the latest version. Current version is 5.x

// Dependencies
using Microsoft.Graph.Communications.Calls.Item.Answer;
using Microsoft.Graph.Models;

var requestBody = new AnswerPostRequestBody
{
	CallbackUri = "https://bot.contoso.com/api/calls",
	AcceptedModalities = new List<Modality?>
	{
		Modality.Audio,
	},
	MediaConfig = new AppHostedMediaConfig
	{
		OdataType = "#microsoft.graph.appHostedMediaConfig",
		Blob = "<Media Session Configuration Blob>",
	},
};

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
await graphClient.Communications.Calls["{call-id}"].Answer.PostAsync(requestBody);



mgc communications calls answer post --call-id {call-id} --body '{\
  "callbackUri": "https://bot.contoso.com/api/calls",\
  "acceptedModalities": [ "audio" ],\
  "mediaConfig": {\
    "@odata.type": "#microsoft.graph.appHostedMediaConfig",\
    "blob": "<Media Session Configuration Blob>"\
  }\
}\
'



// Code snippets are only available for the latest major version. Current major version is $v1.*

// Dependencies
import (
	  "context"
	  msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
	  graphcommunications "github.com/microsoftgraph/msgraph-sdk-go/communications"
	  graphmodels "github.com/microsoftgraph/msgraph-sdk-go/models"
	  //other-imports
)

requestBody := graphcommunications.NewAnswerPostRequestBody()
callbackUri := "https://bot.contoso.com/api/calls"
requestBody.SetCallbackUri(&callbackUri) 
acceptedModalities := []graphmodels.Modalityable {
	modality := graphmodels.AUDIO_MODALITY 
	requestBody.SetModality(&modality)
}
requestBody.SetAcceptedModalities(acceptedModalities)
mediaConfig := graphmodels.NewAppHostedMediaConfig()
blob := "<Media Session Configuration Blob>"
mediaConfig.SetBlob(&blob) 
requestBody.SetMediaConfig(mediaConfig)

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=go
graphClient.Communications().Calls().ByCallId("call-id").Answer().Post(context.Background(), requestBody, nil)


// Code snippets are only available for the latest version. Current version is 6.x

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

com.microsoft.graph.communications.calls.item.answer.AnswerPostRequestBody answerPostRequestBody = new com.microsoft.graph.communications.calls.item.answer.AnswerPostRequestBody();
answerPostRequestBody.setCallbackUri("https://bot.contoso.com/api/calls");
LinkedList<Modality> acceptedModalities = new LinkedList<Modality>();
acceptedModalities.add(Modality.Audio);
answerPostRequestBody.setAcceptedModalities(acceptedModalities);
AppHostedMediaConfig mediaConfig = new AppHostedMediaConfig();
mediaConfig.setOdataType("#microsoft.graph.appHostedMediaConfig");
mediaConfig.setBlob("<Media Session Configuration Blob>");
answerPostRequestBody.setMediaConfig(mediaConfig);
graphClient.communications().calls().byCallId("{call-id}").answer().post(answerPostRequestBody);


const options = {
	authProvider,
};

const client = Client.init(options);

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

await client.api('/communications/calls/57DAB8B1894C409AB240BD8BEAE78896/answer')
	.post(answer);


<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Communications\Calls\Item\Answer\AnswerPostRequestBody;
use Microsoft\Graph\Generated\Models\Modality;
use Microsoft\Graph\Generated\Models\AppHostedMediaConfig;


$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);

$requestBody = new AnswerPostRequestBody();
$requestBody->setCallbackUri('https://bot.contoso.com/api/calls');
$requestBody->setAcceptedModalities([new Modality('audio'),	]);
$mediaConfig = new AppHostedMediaConfig();
$mediaConfig->setOdataType('#microsoft.graph.appHostedMediaConfig');
$mediaConfig->setBlob('<Media Session Configuration Blob>');
$requestBody->setMediaConfig($mediaConfig);

$graphServiceClient->communications()->calls()->byCallId('call-id')->answer()->post($requestBody)->wait();


Import-Module Microsoft.Graph.CloudCommunications

$params = @{
	callbackUri = "https://bot.contoso.com/api/calls"
	acceptedModalities = @(
	"audio"
)
mediaConfig = @{
	"@odata.type" = "#microsoft.graph.appHostedMediaConfig"
	blob = "<Media Session Configuration Blob>"
}
}

Invoke-MgAnswerCommunicationCall -CallId $callId -BodyParameter $params


# Code snippets are only available for the latest version. Current version is 1.x
from msgraph import GraphServiceClient
from msgraph.generated.communications.calls.item.answer.answer_post_request_body import AnswerPostRequestBody
from msgraph.generated.models.modality import Modality
from msgraph.generated.models.app_hosted_media_config import AppHostedMediaConfig
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = AnswerPostRequestBody(
	callback_uri = "https://bot.contoso.com/api/calls",
	accepted_modalities = [
		Modality.Audio,
	],
	media_config = AppHostedMediaConfig(
		odata_type = "#microsoft.graph.appHostedMediaConfig",
		blob = "<Media Session Configuration Blob>",
	),
)

await graph_client.communications.calls.by_call_id('call-id').answer.post(request_body)

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"
      }
    }
  ]
}

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"
    }
  ]
}

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 is 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 participantCapacity is specified in the Answer request for a policy-based recording notification, subsequent participant joining events belonging to the same policy group is sent out as participantJoiningNotification instead of new incoming call notification, until a number of participants that the 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 receive 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"
                     }
                  ]
               }
            }
         }
      }
   ]
}

Share via

call: answer

Permissions

HTTP request

Request headers

Request body

Response

Examples

Request

Response

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

Notification - incoming

Request

Response

Notification - establishing

Notification - established

Example 2: Answer VOIP call with application hosted media

Notification - incoming

Request

Response

Notification - establishing

Notification - established

Notification - content sharing started

Notification - content sharing ended

Example 3: Answer a policy-based recording call

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Additional resources