The consumer electronic bus, or CEBus is a multi‐media LAN standard for the home which is now being finalized in North America by the Electronics Industry Association's Consumer Electronic Bus Committee (CEBC). The CEBus consists of media with data channels, and a control channel. The control channel is used for allocating the use of the data channels and for carrying short messages, whereas the data channels are used to carry various signals which do not fit the control channel. The control channel is digital, whereas the data channels can carry signals of any type.The physical layers for six media are at present defined in the standard: the power line, twisted pair, coaxial cable, infrared, low‐power RF, and a shielded cable bundle. An effort to define the physical layer for the seventh medium, optical fibre, was started at the end of 1989.The data link and network layers are fully implemented, whereas the transport, session and presentation layers are null. The application layer is fully implemented, including a command language which is used to facilitate easy interaction between competitor's products from the same consumer product sector, and between those from different sectors.