Telephony.sendTones()

The sendTones() method of the Telephony Interface generates multiple DTMF tones, with a specified duration for each tone, and an optional delay before generation starts. The tones are sent to the currently active call.

Syntax

The new syntax is promise-based:

myTelephony.sendTones(dtmfChars,pauseDuration,toneDuration,serviceId).then(function() {
  // do something in response
});

In addition to the newly added syntax, the existing syntaxs are just regular non-promise methods without the capability of controlling the duration.

myTelephony.startTone(dtmfChar, serviceId); 
myTelephony.stopTone(serviceId);

Parameters

dtmfChars

A DOMString containing the DTMF characters to generate; these must be characters from 0-9, "*", or "+".

pauseDuration

The time to wait before sending the tones. The default value if none is specified is 3000ms. Optional

toneDuration

The length each tone should be. The default value if none is specified is 70ms. Optional

serviceId

The service ID, as specified in the dom.telephony.defaultServiceId setting. Optional

Examples

// Telephony object
var tel = navigator.mozTelephony;

tel.sendTones("123456789").then(function(call) {
  // 
});

Specifications

Browser compatibility

For obvious reasons, support is primarily expected on mobile browsers.

See also

• Using the Web Telephony API
• TelephonyCall
• CallEvent
• Navigator.mozTelephony