The core of the information superhighway is gigabit high-speed data network, which takes optical cable as the main line of information transmission, branches optical fiber and multimedia terminals, and transmits data, television, voice, images and other forms of information in an interactive way.
The pavement of the information superhighway is paved with optical fibers. The frequency band of optical fiber is particularly wide, which makes the communication capacity of optical fiber communication system particularly large. A hair-thin optical fiber can transmit image signals of 500 TV channels at the same time. Or the voice signals of half a million phones. The information capacity of an optical fiber filament can be as high as thousands of metal wires. In addition, the pulling interference ability of optical fiber is particularly strong, and the attenuation when the signal passes through is particularly small.
The establishment of information superhighway is to establish computer networking among government agencies, universities, research institutions, enterprises and even ordinary families by using digital large-capacity optical fiber flood communication network. The completion of the information superhighway will change people's way of life, work and communication, speed up scientific and technological exchanges, improve work quality and efficiency, enjoy film and television entertainment, telemedicine, implement distance education, hold video conferences and realize online shopping.