American Dynamics ADTT16 Operator's Manual page 42

The T T stops beeping once all active alarms have been
OUCH RACKER
cleared. If the T T was running the Sequence before the alarm
OUCH RACKER
came in, it will restart the Sequence from the beginning. If you were in the
middle of programming when the alarm came in, you will have to resume
programming from the beginning.
3-14 Operator's Manual