It including: power supply system, UPS, power source of DTE, centre computer and network, remote private network, local area network, satellite television receiving antenna and earthing system.
包括电源系统、UPS电源系统、终端设备电源、通讯网络系统、电话线及专线、局域网线路、卫星接收天馈线的防护以及接地保护系统。