If BiPAC 2073N devices are configured in NFBs of different power panel in the house, it requires bridging two NFBs by coupling circuit to work via power lines. However, if BiPAC 2073N devices are configured in the same power panel, it will work normally. If BiPAC 2073N devices are plugged into surge protectors, voltage regulator or UPS, that possess filter protective or surge protective features, it will reduce signal transfer rate or even not work. It is suggested you plug in your BiPAC 2073N devices directly to the wall socket without the addition of other devices.