Surge protectors will defend electrical devices from damage in the event of transient surges, but your electrical devices aren't your only possessions in danger. By installing the Intermatic 2-Line Telephone Protector where your phone line enters your home, you'll be protecting your phone, fax, modem and/or DSL lines from the surges that can destroy their connected components. The Intermatic 2-Line Telephone Protector even carries a 5-year warranty with a $10,000 connected-equipment warranty. Usage and Installation The surface-mounted 2-Line Telephone Protector is designed for low-voltage metallic phone and data lines and features balanced protection between Tip, Ring, and Ground for each of two lines. Terminal block-type connectors allow installation without special tools. Made of epoxy-enameled steel, the 2-Line Telephone Protector has been designed to minimize interference with the signal. Protection Component Details The protection component is a three-element gas tube, which guarantees continued balance between the Tip and Ring lines at all times. Accidental or "sneak" current is minimized by the use of a Positive Temperature Coefficient Resistor (PTCR), which will reset and allow normal phone line operation once the abnormal current situation has been corrected. This Intermatic surge protector will protect two phone lines. You can also install a hardwired surge protector for two telephone lines and one coax line.