Advanced Surge Protection Against Damaging Power Transients Traveling Over Computer, AV & Network Data Lines Data-line Protection Protection of data lines (Ethernet, Coaxial & Phone lines) ensures complete protection of your equipment from surges. It is very important to protect your equipment from “back door” electric surges traveling through data lines, as they can be as damaging to your equipment as surges traveling over power lines. Fail Safe Mode Most other surge suppressors continue to let power through even after their circuits have been damaged, leaving your equipment exposed to future surges. APCs Surge Arrest fail safe, which means that once the circuit of an APC Surge Arrest has been compromised the unit disconnects equipment from the power supply ensuring that no damaging surges reach your equipment. Lightning & Surge Protection To prevent damage to your equipment from electric power surges & spikes.