Azure communication- not able to initiate second call if first call is active

Question

Azure communication- not able to initiate second call if first call is active

Anonymous

I have a requirement to initiate another call while user is on first call. In this scenario first call's video will be turned off but audio will be on, User can mute/unmute audio.
When I am trying to initiate the second call , it throws error saying : CallingCommunicationError: Failed to create call agent, call agent for this ACS Id already exists

however in the azure documentation - its mentioned : You can create a new CallClient instance to create a new CallAgent. I am doing the same (creating new instance of CallClient for second call and then create callAgent using this newly created CallClient instance) but still it throws error saying call agent for this ACS Id already exists and I am not sure what exactly this ACS Id is? below is the code snippet

const callClient = new CallClient()
const credential = new AzureCommunicationTokenCredential(avToken)
this.callAgent = await callClient.createCallAgent(credential, { displayName: userId })
this.deviceManager = await callClient.getDeviceManager()

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Answer 1

SnehaAgrawal-MSFT 22,706 Moderator

Thanks for reaching here! It seems you are trying to have two active call agents with the same identity in the same app, this is not allowed. Each active Call Agent must be its own identity. Also, only one active CallAgent obj is allowed under per CallClient obj.

Please try the following:

const cc1 = new CallClient()  
const cc2 = new CallClient()  
const ca1 = await cc1.createCallAgent(tokenA);  
const ca2 = await cc2.createCallAgent(tokenB);

Let us know.

Anonymous

2022-09-15T08:58:51.957+00:00

Hi Sneha, Thank you for replying
After going through your answer I have a doubt

When I am initiating a new call, first I am creating a new instance of CallCleint and then create a new call agent using this newly created instance of call client and new token for the same user

Is it possible to create new call agent using new token( here token I am referring to avToken from below code snippet) every time for same user or we need new user identity for each new call agent?

const callClient = new CallClient()
const credential = new AzureCommunicationTokenCredential(avToken)
this.callAgent = await callClient.createCallAgent(credential, { displayName: userId })
this.deviceManager = await callClient.getDeviceManager()

SnehaAgrawal-MSFT 22,706 Moderator

Thanks for reply! Each call agent you create must take a different avToken. You cannot use the same avToken for creating different call agents. And by different token, i mean that the identity in the token must be different.

const cc1 = new CallClient()   
const cc2 = new CallClient()   
// The identity for tokenA must be different from tokenB. Both tokens cannot have the same identity   
const credential1 = new AzureCommunicationTokenCredential(tokenA)  
const credential2 = new AzureCommunicationTokenCredential(tokenB)  
const ca1 = await cc1.createCallAgent(credential1 );  
const ca2 = await cc2.createCallAgent(credential2 );

Please let us know if further query or issue remains.

Anonymous

2022-09-20T05:56:59.347+00:00

Hi Sneha, Thank you for the reply

what is meant by the identity in the token must be different? I am passing different values of avToken for different call. However I can not have two different user identity for the same session right?

Also I am not sure what exactly is ACS Id? which Id it refers to?

Is it possible to connect so that I can show you what I am doing and what are my requirements so that we can come to some conclusion

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Azure communication- not able to initiate second call if first call is active

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