US Patent 7408753 Surge-protected networking power strip

A surge-protected hub applied to set up an AC line networking system and used for eliminating the surge problem is provided. The surge-protected hub includes a housing; a plurality of connectors mounted on the housing and electrically connected to an alternating-current power source for independently establishing connections to power lines for power transmission or network lines for networking signal transmission; and a surge-protected device disposed in the housing and arranged upstream of the plurality of connectors for filtering out surge signals that are received from the alternating-current power source while allowing networking signals having a frequency range lying in the frequency range of the surge signals to pass therethrough.