Transfer a call with inline NCCO

A code snippet that shows how to transfer control of the current call to control using inline NCCO.

Example

Replace the following variables in the example code:

Key	Description
`UUID`	The UUID of the call to modify.
`action`	The action to use in updating the call. In this case `transfer`.

Prerequisites

Use your existing application

Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.

Install dependencies

npm install nexmo

Initialize your dependencies

Create a file named transfer-call-with-ncco.js and add the following code:

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const Nexmo = require('nexmo');

const nexmo = new Nexmo({
  apiKey: NEXMO_API_KEY,
  apiSecret: NEXMO_API_SECRET,
  applicationId: NEXMO_APPLICATION_ID,
  privateKey: NEXMO_PRIVATE_KEY
}, {
  debug: true
});

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Write the code

Add the following to transfer-call-with-ncco.js:

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nexmo.calls.update(UUID, {
  action: 'transfer',
  destination: {
    "type": "ncco",
    "ncco": [
      "action": 'talk',
      "text": 'This is a transfer action using an inline NCCO'
    ]
  }
}, (err, res) => {
  if (err) {
    console.error(err);
  } else {
    console.log(res);
  }
});

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Run your code

Save this file to your machine and run it:

node transfer-call-with-ncco.js

Prerequisites

Use your existing application

Install dependencies

Install-Package Nexmo.Csharp.Client

Initialize your dependencies

Create a file named VoiceSender.cs and add the following code:

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var client = new Client(creds: new Nexmo.Api.Request.Credentials
{
    ApiKey = "NEXMO_API_KEY",
    ApiSecret = "NEXMO_API_SECRET",
    ApplicationId = "NEXMO_APPLICATION_ID",
    ApplicationKey = "NEXMO_APPLICATION_PRIVATE_KEY"
});

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Write the code

Add the following to VoiceSender.cs:

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var talkAction = new TalkAction() { Text = "This is a transfer action using an inline NCCO" };
var ncco = new Ncco(talkAction);
var response = client.Call.Edit(UUID,
    new Call.CallEditCommand()
    {
        Action = "transfer",
        Destination = new Call.Destination()
        {
            Type = "ncco",
            Ncco = ncco
        }
    });

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Prerequisites

Use your existing application

Install dependencies

composer require nexmo/client

Initialize your dependencies

Create a file named index.php and add the following code:

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$keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
$client = new \Nexmo\Client($keypair);

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Write the code

Add the following to index.php:

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try {
    $client->calls[UUID]->put([
        'action' => 'transfer',
        'destination' => [
            'type' => 'ncco',
            'ncco' => [[
                'action' => 'talk',
                'text' => 'This call was transferred'
            ]],
        ]
    ]);
} catch (\Nexmo\Client\Exception\Request $e) {
    error_log("Client error: " . $e->getMessage());
    exit(1);
} catch (\Nexmo\Client\Exception\Server $e) {
    error_log("Server error: " . $e->getMessage());
    exit(1);
}

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Run your code

Save this file to your machine and run it:

php index.php

Prerequisites

Use your existing application

Install dependencies

gem install nexmo

Initialize your dependencies

Create a file named transfer-a-call-ncco.rb and add the following code:

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client = Nexmo::Client.new(
  application_id: NEXMO_APPLICATION_ID,
  private_key: File.read(NEXMO_APPLICATION_PRIVATE_KEY_PATH)
)

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Write the code

Add the following to transfer-a-call-ncco.rb:

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ncco = {
  "type": 'ncco',
  "ncco": [
    "action": 'talk',
    "text": 'This is a transfer action using an inline NCCO'
  ]
}

response = client.calls.transfer(UUID, destination: ncco)

puts response.inspect

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Run your code

Save this file to your machine and run it:

ruby transfer-a-call-ncco.rb

Try it out

You will need to:

Set up a call and obtain the call UUID. You could use the 'connect an inbound call' code snippet to do this.
Run the example code to transfer the call.
Control will be transferred to a new NCCO, and you will hear a text-to-speech message to confirm this.