For the security systemto work according to your expectations, communication with the alarm control panel must be ensured. Keypads are intended to serve this purpose. As a rule, the keypad is mounted at an easily accessible place. By means of the keypad, you can give various commands to the control panel, of which "arming" and "disarming" are the most important ones. You can also learn what alarms, troubles and other events have been recorded by the system. Finally, you can program the control panel by using the keypad. At present, two types of keypad are the most widely used: LED keypads, which communicate by means of LED indicators, and LCD keypads, which additionally communicate by means of text displayed on LCD screen. The latter ones, due to their capability of displaying text messages, are easier to operate and more user-friendly.