Edco FAS-31XT RJ31X Security Alarm Dialer Surge Protector.
The Emerson Edco RJ31X Surge Protector FAS-31XT are single-pair telephone or data line protectors that implement advanced two-stage hybrid design. These FAS-31XT units address overvoltage transients with silicon breakover devices, while sneak and fault currents are mitigated with PTC technology which consists of solid-state resettable fuses. FAS-31XT replaces the RJ31X jack with a protected version. Four screw terminals are provided to wire the protector in the same manner as a standard RJ31X jack. The FAS-31XT can be used alone or as an accessory to the TS-1200G AC Power Surge Protector. The TS-1200G provide a convenient grounding point for the FAS-31XT/FAS-TEL ground wire.
FAS-TEL Series PDF