This API is available on Firefox OS for internal applications only.

The speakerEnabled property of the Telephony interface indicates whether or not the speakerphone functionality of the phone is enabled.


// Is the speaker enabled?
var speakerEnabled = myTelephony.speakerEnabled;
// Turn on the speaker
myTelephony.speakerEnabled = true;                 


 A Booleantrue indicates the speaker is enabled; false indicates that it is not. You may read and write this value.


// Telephony object
var tel = navigator.mozTelephony;

// Receive a call
tel.onincoming = function (e) {
  var incomingCall =;

  // Answer the call

// Say we have a button that activates/deactivates the speaker phone
muteButton.onclick = function() {
  if(tel.speakerEnabled) {
    tel.speakerEnabled = false;
  } else {
    tel.speakerEnabled = true;


Specification Status Comment
Web Telephony Draft Draft

Browser compatibility

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

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support No support No support No support No support
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support 12.0 (12.0) 1.0.1 No support No support No support

See also


© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

API B2G Certified DOM DOM Reference Firefox OS Mobile Non-standard Property Reference Référence speakerEnabled Telephony WebAPI