The RJ31X Surface Mounting Jack with shorting bar is used with security systems or similar applications that feature a remote monitoring option. The RJ31X incorporates a shorting bar so that when the alarm reporting device is not plugged in, the phone line continuity is still maintained. This allows an alarm reporting device to be disconnected for testing or other options without disturbing phone service. Below is the wiring diagram for your reference, the registered terminal equipment on this diagram is the security system.
