uses PLC by sending and receiving radio signals over power lines to provide broadband Internet access through ordinary power lines within the houses/building or to the substation. If the house or building is equipped with BPL system, a user with a computer only need a BPL modem that can be plug into the regular power soket to have high-speed Internet access. Broadband 2 to 35 MHz radio waves can be transmitted over distribution lines by installing transmitter at 300 to 500 m distance.