It consisted of a power line communication system, which fed the radio programme on a frequency in the longwave broadcasting range into domestic powerlines.
In the 1930s some towns in Great Britain used wire broadcasting experimentally either over dedicated cables (sometimes as baseband audio) or through power lines.
However as the coverage of conventional broadcast stations improved the popularity of these "radio relay" or "rediffusion" systems waned and local councils were often hostile to their installation.
During World War II, all RF receivers were confiscated,[3] but cable radio continued operating and, in particular, was used to transmit warnings of aerial bombing.
Today, cable radio outlets are installed in all new homes, but many people don't use them or even uninstall the socket and wires inside their units.