Community antenna television:

The transmission of TV programs to the home and office is via coaxial cable. Since they were already wired into so many homes, cable TV companies have had great success selling Internet access. Unlike the other cable service, Internet via cable does not have distance limitations. Cable television or community antenna television is a system of providing television to consumers via radio frequency signals transmitted to televisions through fixed optical fibers or coaxial cables as different to the over-the-air method used in traditional television broadcasting in which a television antenna is required. FM radio programming, high-speed Internet, telephony and similar non-television services may also be provided. The short form of CATV is often used to mean Cable TV. It originally stood for Community Antenna Television from cable television's origins in 1948.
Technology:
Technically, community antenna involves distributing a number of television channels collected at a central location to subscribers within a society by means of a branched network of visual fibers or coaxial cables and broadband amplifiers. As in the case of radio broadcasting the use of special frequencies allows a lot of channels to be distributed through the same cable, without separate wires for each. A Set-top box or the tuner of the TV, VCR or radio selects one channel from this varied signal. The same program is often at the same time broadcast by radio waves and distributed by cable. Other programs may be distributed by cable only. Rules restricting content are often more calm for cable than for over-the-air TV.
Traditional vs. modern:
Conventional cable TV systems worked strictly by way of analog signals but many modern cable TV systems also employ the use of digital cable technology that uses compressed digital signals, allowing them to provide many more channels than they could with analog alone. Contemporary cable TV systems also offer other services such as video on demand, telephony and high-speed data. Cable television is normally regarded as a natural monopoly and a single provider serves most areas. A form has to be filled by the broadcasters as liability insurance for the cable TV industry. Coverage is provided for general liability. Slander, insult or offense, infringement of copyright, literary title or slogan, plagiarism, misappropriation or piracy of intellectual property and invasion of privacy arising out of programming distributed over the cable system. Coverage is extensive for contractual accountability with sponsors and advertising agencies and franchise agreements with public entities.

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