This variable indicates the dialing status of units using
switched connections.
idle - on-hook and no call in progress.
dialing - dialing a number.
onLine - Online passing data.
noWinkFromSwitch - No wink from switch (cleared after 5
seconds). Wink is a DC signalling method in which the
polarity of the line is temporarily reversed and then
returned to its original polarity as an acknowledgement.
numberBusy - Number is busy (cleared after 5 seconds).
noAnswer - No answer. (cleared after 5 seconds).