Press any key on the DCS alarm's keypad if the device is in "Sleep" mode. The keypad needs to be woken up before disarming can engaged.
A continuous tone will be heard for an amount of time programmed by the system's installer.
Disable the alarm before the continuous tone becomes an alarm. Type your four-digit access code onto the DSC alarm's keypad, or wave the proximity card in front of the detector.
Press "#" if a two-second error tone is heard, meaning that access was not granted. Verify that you have entered the access code correctly by typing it again onto the keypad, or wave the proximity card in front of the reader once more instead.