Abstract: Disclosed is a transmission system for transmitting digital information via a power supply network. In one embodiment, there is a transmission device which comprises a generator for generating a simulated digital wave-form carrying the digital information to be transmitted, and a high-voltage injector to inject the generated simulated digital wave-form carrying the digital information into the power supply network. A receiving device is also disclosed, which comprises an analog detector for detecting predetermined harmonic frequencies of a signal frequency, and a logic device to output a logic signal corresponding to the output of the analog detector as said digital information.

Abstract: The invention describes a transmission system for transmitting digital information via a power supply network. The proposed transmission device comprises a generator (4a) for generating a simulated digital wave-form carrying the digital information to be transmitted, wherein the simulated digital wave-form is built of predetermined harmonic frequencies of a signal frequency, and a high-voltage injector (4b) to inject the generated simulated digital wave-form carrying the digital information into the power supply network. The proposed receiving device (6) comprises an analog detector (21) for detecting predetermined harmonic frequencies of a signal frequency, and a logic device (22) to output a logic signal corresponding to the output of the analog detector (21) as said digital information.

Abstract: A receiving device and business methods to affect the private transmission of remote control messages and the synchronization of date and time to electrical appliances connected to the AC power grid.