Overvoltage limiter RJ45 Ethernet 10/100/1000Mb/s Mod. 90POE/PROF Device is designed to overvoltage protection of devices connected to the Ethernet 10/100/1000 Mb/s networks, powered remotely by unused pairs of wires. Device is equipped with 2 lines - data transmission line (pairs 1-2, 3-6) and power line (pairs 4-5, 7-8). To increase the load of power line the wire 4 is shorted to wire 5, and the wire 7 to 8. Using the shielded RJ-45 sockets and FTP cable you can ensure shield continuity. The socket shield is connected to the ground.