Cable television

Nowadays almost all use telephone and internet services via cables. Service providers are trying to supply television services also through cables. During initial days, cable television was required a big antenna on a hilltop for receiving signals, an amplifier for strengthening the signal and a coaxial cable to deliver it to customers. This system was called as community antenna television. In a hybrid fiber coax (HFC) system, fiber is used for long-haul runs and a coaxial cable for distribution to customers. A fiber node which can feed more coaxial cables is effective in preserving interface between the optical and electrical parts of the system. Thus these fiber nodes are acting as superlative electro-optical converters. Spectrum allocation is an important task here before the government and Indian government is yet to clear the bill in this regard. In North America, allowed spectrum is 54-550 MHz for different cable television channels. Nowadays long local loops are used as an alternative to long coaxial cables. The latest technology is making use of an intelligent computer system with a high-bandwidth fiber interface to the internet service provider. This is called cable modem termination system.