90Item DescriptionMaximum transmissiondistance0.55 km(0.34 miles)10 km (6.21miles)40 km (24.86miles)40 km (24.86miles)70 km (43.50miles)Lightning protector for a network port (optional)If part of the network cable of a network port must be routed outdoors, connect a lightning protector tothe cable before you plug the cable into the port.The specifications for the lightning protector for a network port are as follows: 1000 M port protectiveunit–single port, maximum discharge current (8/20μs waveform): 3 kA, output voltage: core-core < 15V, core-ground < 350 V.For how to install a lightning protector for a network port, see "Installing a lightning protector for anetwork port."Power strip with lightning protection (optional)If part of the AC power line is routed outdoors, use a power strip with lightning protection to connect theAC power cord of the firewall to the AC power line to protect the firewall from being damaged bylightning strikes.The specifications for the power strip with lightning protection are as follows: Maximum discharge current:6500 A, protection voltage: 220 VAC to 500 VAC.For how to connect the AC power supply to a power strip with lightning protection, see "Connecting theAC power supply to a power strip with lightning protection."
