If network server ,router,network switch,HUB and other signal terminal device with network interface(RJ45),to prevent the device damage cause by inductive over voltage or ground potential rise.

• 如网络服务器、路由器、网络交换机、HUB等网络（RJ45)接口的信息终端设备，防止因线路感应过电压或地电位升高对设备的损坏。