Play DTMF into a call
This code snippet plays DTMF tones into the specified call.
Example
Replace the following variables in the example code:
| Key | Description |
|---|---|
UUID |
The UUID of the call leg. |
DIGITS |
Digits representing the DTMF tones that will be played into the call. |
Prerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
Execute the following command at your terminal prompt to create the JWT for authentication:
export JWT=$(nexmo jwt:generate $PATH_TO_PRIVATE_KEY application_id=$NEXMO_APPLICATION_ID)Write the code
Add the following to play-dtmf-into-a-call.sh:
curl -X PUT https://api.nexmo.com/v1/calls/$UUID/dtmf \
-H "Authorization: Bearer "$JWT\
-H "Content-Type: application/json"\
-d '{"digits": 1713}'
Run your code
Save this file to your machine and run it:
bash play-dtmf-into-a-call.shPrerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
npm install @vonage/server-sdkCreate a file named play-dtmf-into-call.js and add the following code:
const Vonage = require('@vonage/server-sdk');
const vonage = new Vonage({
apiKey: VONAGE_API_KEY,
apiSecret: VONAGE_API_SECRET,
applicationId: VONAGE_APPLICATION_ID,
privateKey: VONAGE_PRIVATE_KEY
}, {debug: true});
Write the code
Add the following to play-dtmf-into-call.js:
const DIGITS = '1234567890';
vonage.calls.dtmf.send(UUID, { digits: DIGITS }, (err, res) => {
if(err) { console.error(err); }
else {
console.log(res);
}
});
Run your code
Save this file to your machine and run it:
node play-dtmf-into-call.jsPrerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
Add the following to `build.gradle`:
compile 'com.vonage:client:6.2.0'Create a class named SendDtmfToCall and add the following code to the main method:
VonageClient client = VonageClient.builder()
.applicationId(VONAGE_APPLICATION_ID)
.privateKeyPath(VONAGE_PRIVATE_KEY_PATH)
.build();
Write the code
Add the following to the main method of the SendDtmfToCall class:
final String ANSWER_URL = "https://nexmo-community.github.io/ncco-examples/long-tts.json";
CallEvent call = client.getVoiceClient().createCall(new Call(
TO_NUMBER,
VONAGE_NUMBER,
ANSWER_URL
));
Thread.sleep(20000);
final String UUID = call.getUuid();
final String DIGITS = "332393";
client.getVoiceClient().sendDtmf(UUID, DIGITS);
Run your code
We can use the application plugin for Gradle to simplify the running of our application.
Update your build.gradle with the following:
apply plugin: 'application'
mainClassName = project.hasProperty('main') ? project.getProperty('main') : '' Run the following gradle command to execute your application, replacing com.vonage.quickstart.voice with the package containing SendDtmfToCall:
gradle run -Pmain=com.vonage.quickstart.voice.SendDtmfToCallPrerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
Install-Package VonageCreate a file named PlayDtmfIntoCall.cs and add the following code:
using Vonage.Voice;
using Vonage.Request;
using Vonage;
Add the following to PlayDtmfIntoCall.cs:
var credentials = Credentials.FromAppIdAndPrivateKeyPath(vonageApplicationId, vonagePrivateKeyPath);
Write the code
Add the following to PlayDtmfIntoCall.cs:
var command = new DtmfCommand() { Digits = digits };
Prerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
composer require vonage/clientCreate a file named index.php and add the following code:
$keypair = new \Vonage\Client\Credentials\Keypair(
file_get_contents(VONAGE_APPLICATION_PRIVATE_KEY_PATH),
VONAGE_APPLICATION_ID
);
$client = new \Vonage\Client($keypair);
Write the code
Add the following to index.php:
$client->voice()->playDTMF(UUID, '2468#');
Run your code
Save this file to your machine and run it:
php index.phpPrerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
pip install vonageCreate a file named play-dtmf-into-call.py and add the following code:
client = vonage.Client(
application_id=VONAGE_APPLICATION_ID,
private_key=VONAGE_APPLICATION_PRIVATE_KEY_PATH,
)
Write the code
Add the following to play-dtmf-into-call.py:
client.voice.send_dtmf(VONAGE_CALL_UUID, digits='1234')
Run your code
Save this file to your machine and run it:
python3 play-dtmf-into-call.pyPrerequisites
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same VONAGE_APPLICATION_ID and private key that were used to create the call.
gem install vonageCreate a file named play-dtmf-into-call.rb and add the following code:
client = Vonage::Client.new(
application_id: VONAGE_APPLICATION_ID,
private_key: File.read(VONAGE_APPLICATION_PRIVATE_KEY_PATH)
Write the code
Add the following to play-dtmf-into-call.rb:
DIGITS = '332393'
response = client.voice.dtmf.send(UUID, digits: DIGITS)
Run your code
Save this file to your machine and run it:
ruby play-dtmf-into-call.rbTry it out
When you run the code a series of DTMF tones is played into the call identified with the specified UUID.