What does it mean when the panel displays a trouble of "Dialer Answering Unknown"?
"Dialer Answering Unknown" is caused by the panel answering an incoming phone call. This will cause a trouble tone from the panel that will clear itself when the panel releases the line, this may take up to 10 minutes. If another event (Alarm, Trouble, Supervisory) occurs during this time, the panel will drop the line and dial out to the central station.
To prevent or stop this set the Line 1 Ring Count to (0).