APC Essential SurgeArrest 8 outlets with Coax & Network Protection, 230V Australia Data-line Protection Protection of data lines (Ethernet, Coaxial and 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. Lightning and Surge Protection To prevent damage to your equipment from electric power surges and spikes.