Broadband (Wideband) distribution systems – A telecommunications medium that carries high-frequency signals; includes television frequencies of 3 to 6 megahertz. Broadband distribution systems work like cable TV, in that up to twenty channels are available from a single coaxial cable. A main trunk cable will originate at the control room and run down the hallways of the viewing area. Smaller cables can tie into the main cable at any point along its length. Any room that is near the main cable run can have access to all the channels on the system. Normal television sets are used, and a variety of channels can be received by simply changing channels on the television set.