In addition to the fixed network, there is also the TV cable network, which also consists of fixed lines. It takes its name from "cable TV coverage". Therefore, a technology is meant to be transferred to the TV signals to the TV via a cable network. Before that was the reception of broadcast signals (TV and radio) over a usual home antenna. However, only the reception was so possible from 3 stations. An alternative is satellite. The liberalization of the telecommunications market have for cable operators new possibilities. The cable operators have a wide-area network on which they transmit TV and radio programs. Since it is obvious to extend this network for the transmission of data and use them to additional services, such as offering telephony and Internet access. The cable networks have been built in 80's. They were originally intended only for the transmission of television and radio. For an Internet access or telephony lacked the required feedback channel.
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