DL1200 Loop Protection ensures the protection of your CAT5 lines from damaging surges and spikes. The device features 12-ports with replaceable 4-port modules and 110 punch-down input to RJ45 output, and is ideal for the protection LAN/Data applications. Solid-state protection provides the fastest response to transient voltages (1-5 nanoseconds) by quickly diverting damaging surges to ground. It also features Signal Perfect Circuitry for auto-resetting surge protection for data networks, telephone and coax lines.