Mains signalling is a method by which signals can be superimposed on mains wiring for the
remote control of electrical equipment. It was first proposed by two Swiss inventors, Routin and
Brown, who paten ted the method to control street lighting in 1896. The technique is weil
established and accepted in the USA, but in this country and Europe interest in it as a medium
for communication has begun only in the late 1980s. This arttele deals with a system for use in
horne automation. The main advantages of the system are ease of installation, flexibility and
relatively low cost (because it uses existing mains wiring.
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