This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
getStaus method is used to access the current status of a specified service.
var status = navigator.mozVoicemail.getStatus([serviceId]);
- A number representing the voicemail service to access.
MozVoicemailStatus object or
null if the status is unknown.
Not part of any specification yet.