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Quickstart: Join your calling app to a Teams Auto Attendant

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In this quickstart you are going to learn how to start a call from Azure Communication Services user to Teams Auto Attendant. You are going to achieve it with the following steps:

  1. Enable federation of Azure Communication Services resource with Teams Tenant.
  2. Select or create Teams Auto Attendant via Teams Admin Center.
  3. Get email address of Auto Attendant via Teams Admin Center.
  4. Get Object ID of the Auto Attendant via Graph API.
  5. Start a call with Azure Communication Services Calling SDK.

If you'd like to skip ahead to the end, you can download this quickstart as a sample on GitHub.

Enable interoperability in your Teams tenant

Microsoft Entra user with Teams administrator role can run PowerShell cmdlet with MicrosoftTeams module to enable the Communication Services resource in the tenant.

1. Prepare the Microsoft Teams module

First, open the PowerShell and validate the existence of the Teams module with the following command:

Get-module *teams*

If you don't see the MicrosoftTeams module, install it first. To install the module, you need to run PowerShell as an administrator. Then run the following command:

	Install-Module -Name MicrosoftTeams

You'll be informed about the modules that will be installed, which you can confirm with a Y or A answer. If the module is installed but is outdated, you can run the following command to update the module:

	Update-Module MicrosoftTeams

2. Connect to Microsoft Teams module

When the module is installed and ready, you can connect to the MicrosftTeams module with the following command. You'll be prompted with an interactive window to log in. The user account that you're going to use needs to have Teams administrator permissions. Otherwise, you might get an access denied response in the next steps.

Connect-MicrosoftTeams

3. Enable tenant configuration

Interoperability with Communication Services resources is controlled via tenant configuration and assigned policy. Teams tenant has a single tenant configuration, and Teams users have assigned global policy or custom policy. For more information, see Assign Policies in Teams.

After successful login, you can run the cmdlet Set-CsTeamsAcsFederationConfiguration to enable Communication Services resource in your tenant. Replace the text IMMUTABLE_RESOURCE_ID with an immutable resource ID in your communication resource. You can find more details on how to get this information here.

$allowlist = @('IMMUTABLE_RESOURCE_ID')
Set-CsTeamsAcsFederationConfiguration -EnableAcsUsers $True -AllowedAcsResources $allowlist

4. Enable tenant policy

Each Teams user has assigned an External Access Policy that determines whether Communication Services users can call this Teams user. Use cmdlet Set-CsExternalAccessPolicy to ensure that the policy assigned to the Teams user has set EnableAcsFederationAccess to $true

Set-CsExternalAccessPolicy -Identity Global -EnableAcsFederationAccess $true

Create or select Teams Auto Attendant

Teams Auto Attendant is system that provides an automated call handling system for incoming calls. It serves as a virtual receptionist, allowing callers to be automatically routed to the appropriate person or department without the need for a human operator. You can select existing or create new Auto Attendant via Teams Admin Center.

Learn more about how to create Auto Attendant using Teams Admin Center here.

Find Object ID for Auto Attendant

After Auto Attendant is created, we need to find correlated Object ID to use it later for calls. Object ID is connected to Resource Account that was attached to Auto Attendant - open Resource Accounts tab in Teams Admin and find email of account. Screenshot of Resource Accounts in Teams Admin Portal. All required information for Resource Account can be found in Microsoft Graph Explorer using this email in the search.

https://graph.microsoft.com/v1.0/users/lab-test2-cq-@contoso.com

In results we'll are able to find "ID" field

    "userPrincipalName": "lab-test2-cq@contoso.com",
    "id": "31a011c2-2672-4dd0-b6f9-9334ef4999db"

Prerequisites

Setting up

Create a new Node.js application

Open your terminal or command window create a new directory for your app, and navigate to the directory.

mkdir calling-quickstart && cd calling-quickstart

Install the package

Use the npm install command to install the Azure Communication Services Calling SDK for JavaScript.

Important

This quickstart uses the Azure Communication Services Calling SDK version next.

npm install @azure/communication-common@next --save
npm install @azure/communication-calling@next --save

Set up the app framework

This quickstart uses webpack to bundle the application assets. Run the following command to install the webpack, webpack-cli and webpack-dev-server npm packages and list them as development dependencies in your package.json:

npm install copy-webpack-plugin@^11.0.0 webpack@^5.88.2 webpack-cli@^5.1.4 webpack-dev-server@^4.15.1 --save-dev

Create an index.html file in the root directory of your project. We'll use this file to configure a basic layout that will allow the user to place a 1:1 video call.

Here's the code:

<!-- index.html -->
<!DOCTYPE html>
<html>
    <head>
        <title>Azure Communication Services - Calling Web SDK</title>
    </head>
    <body>
        <h4>Azure Communication Services - Calling Web SDK</h4>
        <input id="user-access-token"
            type="text"
            placeholder="User access token"
            style="margin-bottom:1em; width: 500px;"/>
        <button id="initialize-teams-call-agent" type="button">Initialize Call Agent</button>
        <br>
        <br>
        <input id="application-object-id"
            type="text"
            placeholder="Enter application objectId identity in format: 'APP_GUID'"
            style="margin-bottom:1em; width: 500px; display: block;"/>
        <button id="start-call-button" type="button" disabled="true">Start Call</button>
        <button id="hangup-call-button" type="button" disabled="true">Hang up Call</button>
        <button id="accept-call-button" type="button" disabled="true">Accept Call</button>
        <button id="start-video-button" type="button" disabled="true">Start Video</button>
        <button id="stop-video-button" type="button" disabled="true">Stop Video</button>
        <br>
        <br>
        <div id="connectedLabel" style="color: #13bb13;" hidden>Call is connected!</div>
        <br>
        <div id="remoteVideoContainer" style="width: 40%;" hidden>Remote participants' video streams:</div>
        <br>
        <div id="localVideoContainer" style="width: 30%;" hidden>Local video stream:</div>
        <!-- points to the bundle generated from client.js -->
        <script src="./main.js"></script>
    </body>
</html>

Azure Communication Services Calling Web SDK Object model

The following classes and interfaces handle some of the main features of the Azure Communication Services Calling SDK:

Name Description
CallClient The main entry point to the Calling SDK.
CallAgent Used to start and manage calls.
DeviceManager Used to manage media devices.
Call Used for representing a Call.
LocalVideoStream Used for creating a local video stream for a camera device on the local system.
RemoteParticipant Used for representing a remote participant in the Call.
RemoteVideoStream Used for representing a remote video stream from a Remote Participant.

Create a file in the root directory of your project called client.js to contain the application logic for this quickstart. Add the following code to client.js:

// Make sure to install the necessary dependencies
const { CallClient, VideoStreamRenderer, LocalVideoStream } = require('@azure/communication-calling');
const { AzureCommunicationTokenCredential } = require('@azure/communication-common');
const { AzureLogger, setLogLevel } = require("@azure/logger");
// Set the log level and output
setLogLevel('verbose');
AzureLogger.log = (...args) => {
    console.log(...args);
};
// Calling web sdk objects
let callAgent;
let deviceManager;
let call;
let incomingCall;
let localVideoStream;
let localVideoStreamRenderer;
// UI widgets
let userAccessToken = document.getElementById('user-access-token');
let applicationObjectId = document.getElementById('application-object-id');
let initializeCallAgentButton = document.getElementById('initialize-teams-call-agent');
let startCallButton = document.getElementById('start-call-button');
let hangUpCallButton = document.getElementById('hangup-call-button');
let acceptCallButton = document.getElementById('accept-call-button');
let startVideoButton = document.getElementById('start-video-button');
let stopVideoButton = document.getElementById('stop-video-button');
let connectedLabel = document.getElementById('connectedLabel');
let remoteVideoContainer = document.getElementById('remoteVideoContainer');
let localVideoContainer = document.getElementById('localVideoContainer');
/**
 * Create an instance of CallClient. Initialize a CallAgent instance with a AzureCommunicationTokenCredential via created CallClient. CallAgent enables us to make outgoing calls and receive incoming calls. 
 * You can then use the CallClient.getDeviceManager() API instance to get the DeviceManager.
 */
initializeCallAgentButton.onclick = async () => {
    try {
        const callClient = new CallClient(); 
        tokenCredential = new AzureCommunicationTokenCredential(userAccessToken.value.trim());
        callAgent = await callClient.createCallAgent(tokenCredential)
        // Set up a camera device to use.
        deviceManager = await callClient.getDeviceManager();
        await deviceManager.askDevicePermission({ video: true });
        await deviceManager.askDevicePermission({ audio: true });
        // Listen for an incoming call to accept.
        callAgent.on('incomingCall', async (args) => {
            try {
                incomingCall = args.incomingCall;
                acceptCallButton.disabled = false;
                startCallButton.disabled = true;
            } catch (error) {
                console.error(error);
            }
        });
        startCallButton.disabled = false;
        initializeCallAgentButton.disabled = true;
    } catch(error) {
        console.error(error);
    }
}
/**
 * Place a 1:1 outgoing video call to an Teams Auto attendant
 * Add an event listener to initiate a call when the `startCallButton` is selected.
 * Enumerate local cameras using the deviceManager `getCameraList` API.
 * In this quickstart, we're using the first camera in the collection. Once the desired camera is selected, a
 * LocalVideoStream instance will be constructed and passed within `videoOptions` as an item within the
 * localVideoStream array to the call method. When the call connects, your application will be sending a video stream to the other participant. 
 */
startCallButton.onclick = async () => {
    try {
        const localVideoStream = await createLocalVideoStream();
        const videoOptions = localVideoStream ? { localVideoStreams: [localVideoStream] } : undefined;
        call = callAgent.startCall([{ teamsAppId: applicationObjectId.value.trim(), cloud:"public" }], { videoOptions: videoOptions });
        // Subscribe to the call's properties and events.
        subscribeToCall(call);
    } catch (error) {
        console.error(error);
    }
}
/**
 * Accepting an incoming call with a video
 * Add an event listener to accept a call when the `acceptCallButton` is selected.
 * You can accept incoming calls after subscribing to the `CallAgent.on('incomingCall')` event.
 * You can pass the local video stream to accept the call with the following code.
 */
acceptCallButton.onclick = async () => {
    try {
        const localVideoStream = await createLocalVideoStream();
        const videoOptions = localVideoStream ? { localVideoStreams: [localVideoStream] } : undefined;
        call = await incomingCall.accept({ videoOptions });
        // Subscribe to the call's properties and events.
        subscribeToCall(call);
    } catch (error) {
        console.error(error);
    }
}
// Subscribe to a call obj.
// Listen for property changes and collection udpates.
subscribeToCall = (call) => {
    try {
        // Inspect the initial call.id value.
        console.log(`Call Id: ${call.id}`);
        //Subsribe to call's 'idChanged' event for value changes.
        call.on('idChanged', () => {
            console.log(`Call ID changed: ${call.id}`); 
        });
        // Inspect the initial call.state value.
        console.log(`Call state: ${call.state}`);
        // Subscribe to call's 'stateChanged' event for value changes.
        call.on('stateChanged', async () => {
            console.log(`Call state changed: ${call.state}`);
            if(call.state === 'Connected') {
                connectedLabel.hidden = false;
                acceptCallButton.disabled = true;
                startCallButton.disabled = true;
                hangUpCallButton.disabled = false;
                startVideoButton.disabled = false;
                stopVideoButton.disabled = false;
            } else if (call.state === 'Disconnected') {
                connectedLabel.hidden = true;
                startCallButton.disabled = false;
                hangUpCallButton.disabled = true;
                startVideoButton.disabled = true;
                stopVideoButton.disabled = true;
                console.log(`Call ended, call end reason={code=${call.callEndReason.code}, subCode=${call.callEndReason.subCode}}`);
            }   
        });

        call.on('isLocalVideoStartedChanged', () => {
            console.log(`isLocalVideoStarted changed: ${call.isLocalVideoStarted}`);
        });
        console.log(`isLocalVideoStarted: ${call.isLocalVideoStarted}`);
        call.localVideoStreams.forEach(async (lvs) => {
            localVideoStream = lvs;
            await displayLocalVideoStream();
        });
        call.on('localVideoStreamsUpdated', e => {
            e.added.forEach(async (lvs) => {
                localVideoStream = lvs;
                await displayLocalVideoStream();
            });
            e.removed.forEach(lvs => {
               removeLocalVideoStream();
            });
        });
        
        // Inspect the call's current remote participants and subscribe to them.
        call.remoteParticipants.forEach(remoteParticipant => {
            subscribeToRemoteParticipant(remoteParticipant);
        });
        // Subscribe to the call's 'remoteParticipantsUpdated' event to be
        // notified when new participants are added to the call or removed from the call.
        call.on('remoteParticipantsUpdated', e => {
            // Subscribe to new remote participants that are added to the call.
            e.added.forEach(remoteParticipant => {
                subscribeToRemoteParticipant(remoteParticipant)
            });
            // Unsubscribe from participants that are removed from the call
            e.removed.forEach(remoteParticipant => {
                console.log('Remote participant removed from the call.');
            });
        });
    } catch (error) {
        console.error(error);
    }
}
// Subscribe to a remote participant obj.
// Listen for property changes and collection udpates.
subscribeToRemoteParticipant = (remoteParticipant) => {
    try {
        // Inspect the initial remoteParticipant.state value.
        console.log(`Remote participant state: ${remoteParticipant.state}`);
        // Subscribe to remoteParticipant's 'stateChanged' event for value changes.
        remoteParticipant.on('stateChanged', () => {
            console.log(`Remote participant state changed: ${remoteParticipant.state}`);
        });
        // Inspect the remoteParticipants's current videoStreams and subscribe to them.
        remoteParticipant.videoStreams.forEach(remoteVideoStream => {
            subscribeToRemoteVideoStream(remoteVideoStream)
        });
        // Subscribe to the remoteParticipant's 'videoStreamsUpdated' event to be
        // notified when the remoteParticiapant adds new videoStreams and removes video streams.
        remoteParticipant.on('videoStreamsUpdated', e => {
            // Subscribe to newly added remote participant's video streams.
            e.added.forEach(remoteVideoStream => {
                subscribeToRemoteVideoStream(remoteVideoStream)
            });
            // Unsubscribe from newly removed remote participants' video streams.
            e.removed.forEach(remoteVideoStream => {
                console.log('Remote participant video stream was removed.');
            })
        });
    } catch (error) {
        console.error(error);
    }
}
/**
 * Subscribe to a remote participant's remote video stream obj.
 * You have to subscribe to the 'isAvailableChanged' event to render the remoteVideoStream. If the 'isAvailable' property
 * changes to 'true' a remote participant is sending a stream. Whenever the availability of a remote stream changes
 * you can choose to destroy the whole 'Renderer' a specific 'RendererView' or keep them. Displaying RendererView without a video stream will result in a blank video frame. 
 */
subscribeToRemoteVideoStream = async (remoteVideoStream) => {
    // Create a video stream renderer for the remote video stream.
    let videoStreamRenderer = new VideoStreamRenderer(remoteVideoStream);
    let view;
    const renderVideo = async () => {
        try {
            // Create a renderer view for the remote video stream.
            view = await videoStreamRenderer.createView();
            // Attach the renderer view to the UI.
            remoteVideoContainer.hidden = false;
            remoteVideoContainer.appendChild(view.target);
        } catch (e) {
            console.warn(`Failed to createView, reason=${e.message}, code=${e.code}`);
        }	
    }
    
    remoteVideoStream.on('isAvailableChanged', async () => {
        // Participant has switched video on.
        if (remoteVideoStream.isAvailable) {
            await renderVideo();
        // Participant has switched video off.
        } else {
            if (view) {
                view.dispose();
                view = undefined;
            }
        }
    });
    // Participant has video on initially.
    if (remoteVideoStream.isAvailable) {
        await renderVideo();
    }
}
// Start your local video stream.
// This will send your local video stream to remote participants so they can view it.
startVideoButton.onclick = async () => {
    try {
        const localVideoStream = await createLocalVideoStream();
        await call.startVideo(localVideoStream);
    } catch (error) {
        console.error(error);
    }
}
// Stop your local video stream.
// This will stop your local video stream from being sent to remote participants.
stopVideoButton.onclick = async () => {
    try {
        await call.stopVideo(localVideoStream);
    } catch (error) {
        console.error(error);
    }
}
/**
 * To render a LocalVideoStream, you need to create a new instance of VideoStreamRenderer, and then
 * create a new VideoStreamRendererView instance using the asynchronous createView() method.
 * You may then attach view.target to any UI element. 
 */
// Create a local video stream for your camera device
createLocalVideoStream = async () => {
    const camera = (await deviceManager.getCameras())[0];
    if (camera) {
        return new LocalVideoStream(camera);
    } else {
        console.error(`No camera device found on the system`);
    }
}
// Display your local video stream preview in your UI
displayLocalVideoStream = async () => {
    try {
        localVideoStreamRenderer = new VideoStreamRenderer(localVideoStream);
        const view = await localVideoStreamRenderer.createView();
        localVideoContainer.hidden = false;
        localVideoContainer.appendChild(view.target);
    } catch (error) {
        console.error(error);
    } 
}
// Remove your local video stream preview from your UI
removeLocalVideoStream = async() => {
    try {
        localVideoStreamRenderer.dispose();
        localVideoContainer.hidden = true;
    } catch (error) {
        console.error(error);
    } 
}
// End the current call
hangUpCallButton.addEventListener("click", async () => {
    // end the current call
    await call.hangUp();
});

Add the webpack local server code

Create a file in the root directory of your project called webpack.config.js to contain the local server logic for this quickstart. Add the following code to webpack.config.js:

const path = require('path');
const CopyPlugin = require("copy-webpack-plugin");

module.exports = {
    mode: 'development',
    entry: './client.js',
    output: {
        filename: 'main.js',
        path: path.resolve(__dirname, 'dist'),
    },
    devServer: {
        static: {
            directory: path.join(__dirname, './')
        },
    },
    plugins: [
        new CopyPlugin({
            patterns: [
                './index.html'
            ]
        }),
    ]
};

Run the code

Use the webpack-dev-server to build and run your app. Run the following command to bundle the application host in a local webserver:

npx webpack serve --config webpack.config.js

Manual steps to setup the call:

  1. Open your browser and navigate to http://localhost:8080/.
  2. Enter a valid user access token. Refer to the user access token documentation if you don't already have access tokens available to use.
  3. Click on the "Initialize Call Agent" buttons.
  4. Enter the Auto Attendant Object ID, and select the "Start Call" button. Application will start the outgoing call to the auto attendant with given object ID.
  5. Call is connected to the Auto Attendant.
  6. Communication Services user is routed through Auto Attendant based on it's configuration.

Clean up resources

If you want to clean up and remove a Communication Services subscription, you can delete the resource or resource group. Deleting the resource group also deletes any other resources associated with it. Learn more about cleaning up resources.

Next steps

For more information, see the following articles: