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

The oncallschanged property of the Telephony interface specifies an event listener to receive callschanged events. These events occur when the list of ongoing calls, as indicated by Telephony.calls, changes.


myTelephony.oncallschanged = function() { ... };

These events are of type CallEvent.


// Telephony object
var tel = navigator.mozTelephony;

tel.oncallschanged = function() {
  // When call list changes, do something


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, jsx, kscarfone, Jeremie, Sheppy
 Last updated by: chrisdavidmills,