emergency alarm systems
Don’t let anyone convince you that motion detectors alone are a substitute for them. Glass breakage sensors are available too, but are optional. Most burglars only break glass in order to unlock a door or window. Then, when they open the door or window, a standard transmitter will detect the entry. Next, decide what kind of control panel you want. There are two types: A “cabinet style” panel consists of a keyboard that mounts near the door and a circuit board that mounts near your phone interface. A “self contained” panel is a single unit that mounts near the door. This one part panel is easier to install but has one weakness. An intruder entering through the door can tear it off the wall before the panel finishes notifying the monitoring service. With a two part panel, the circuit board keeps working even if the keypad is disconnected. With either type of panel, you’ll need a special phone jack called an “RJ31X” to connect the panel to your phone lines.