This API is available on Firefox OS for internal applications only.
Summary
The isScoConnected method is used to allow to know if there is a SCO connection between local and the remote Bluetooth device.
Syntax
var request = instanceOfBluetoothAdapter.isScoConnected();
Returns
A DOMRequest object to handle the success or error of the operation.
Specification
Not part of any specification yet. It should be discussed as part of the W3C's System Applications Working Group.