Send DTMF

The SendDtmf verb is used to play DTMF digits in the call.

• The , and lowercase w characters introduce a half-second pause into the DTMF sequence.
• An uppercase W character introduces a one-second pause into the DTMF sequence.
• *, #, a-d, and A-D are also supported in addition to the numeric characters 0-9.

Text Content

Name	Description
digits	String containing the DTMF characters to be sent in a call. Allows a maximum of 50 characters. The digits will be sent one-by-one with a marginal delay.

Attributes

ATTRIBUTE	Description
toneDuration	(optional) The length (in milliseconds) of each DTMF tone. Default value is 200. Range: decimal values between 50 - 5000.
toneInterval	(optional) The duration of silence (in milliseconds) following each DTMF tone. Default value is 400. Range: decimal values between 50 - 5000.

tip

All w, , and W chars replace toneInterval, so if a <SendDtmf toneInterval="300">1w2</SendDtmf> is used, 2 will be played 500ms after 1 because of w

Webhooks Received

There are no webhooks received after the <SendDtmf> verb is executed.

Examples

Send DTMF Tones to a Call

XML

<?xml version="1.0" encoding="UTF-8"?>
<Response>
   <SendDtmf>12w34</SendDtmf>
</Response>

Java

SendDtmf sendDtmf = new SendDtmf().builder()
        .digits("12w34")
        .build();

Response response = new Response()
        .with(sendDtmf);

C#

SendDtmf sendDtmf = new SendDtmf
{
    Digits = "12w34"
};

Response response = new Response();
response.Add(sendDtmf);

Console.WriteLine(response.ToBXML());

Ruby

send_dtmf = Bandwidth::Bxml::SendDtmf.new('12w34')
response = Bandwidth::Bxml::Response.new([send_dtmf])

p response.to_bxml

NodeJS

const sendDtmf = new Bxml.SendDtmf('12w34');
const response = new Bxml.Response(sendDtmf);

console.log(response.toBxml());

Python

send_dtmf = SendDtmf(digits="12w34")

response = Response()
response.add_verb(send_dtmf)

print(response.to_bxml())

PHP

$sendDtmf = new BandwidthLib\Voice\Bxml\SendDtmf("12w34");

$response = new BandwidthLib\Voice\Bxml\Response();
$response->addVerb($sendDtmf);

echo $response->toBxml();