Go to the alarm's control panel once the alarm sounds and flip down the cover on the alarm's touch pad if necessary.
Enter your four-digit alarm code or master code onto the numbered keypad. The alarm will go silent once the correct code is entered. The master code should be inside your instruction manual for reference.
Call ADT if you accidentally trigger the alarm and the system is hooked up to an emergency response line or if you've forgotten your code. The company automatically sends a uniformed agent to your home once an alarm is triggered, and ADT will call the police, fire or ambulance service when required.