server will try to apply following actions:
if the device is supporting direct call control - it will be requested to perform answer operation
otherwise
the server will terminate current request to the device and make new one with request to autoanswer.
emulation is not reliable action and depends on how device is handling autoanswer request.
void Answer()| OperationFailed | call manager has rejected request |
| PBXIsNotConnected | No connection with call manager to perform action |