Keypads. Callaway Security typically installs two keypads in each home. Located at the Garage Entry and in the Master Bedroom, keypads arm and disarm the alarm system. Having a centrally located keypad enhances your security and gives your family easy access to your security system. Arming and disarming the alarm system is easy as entering a four digit code. Basic keypad features include back lit numbers that are illuminated in the dark. LCD English readout keypads offer the customer more description of open zones or spell out where an alarm has occurred. Most keypads even offer convenient additional user codes to give friends, neighbors or service people access to your home.