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

The calls read-only property of the Telephony interface returns a list of TelephonyCall objects representing the currently connected telephone calls.


var callList = myTelephony.calls;


An Array of ongoing calls, each represented by a TelephonyCall object.


// Telephony object
var tel = navigator.mozTelephony;

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

  // Answer the call

// should return an array containing the call referenced in the above function
var callList = tel.calls;


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

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, teoli, fscholz, MHasan, kscarfone, Jeremie, Sheppy
 Last updated by: chrisdavidmills,