The majority of all surge induced damage is caused by surges and spikes traveling along unprotected data lines. These surges originate from a wide variety of sources, including static charge build up and lightning strikes. Left unprotected, your data lines expose network cards, A/V components, modems and other network equipment to damaging electrical transients. The ProtectNet family of stand alone surge suppressors protects individual data lines, including telephone and network lines, coax cables, and more. Inserting a ProtectNet in your data line and connecting it to earth ground prevents back door surges from ruining your productivity and costing you money.