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Telecommunications refers to the use of electronic technology to transmit information between different locations. Telecommunications includes different types of long-distance communication methods, radio, telegraph, Television, telephone, data communication and computer network communication, etc. ?

Telecommunications are an important pillar of the information society. Whether in human social and economic activities or in all aspects of people's daily lives, telecommunications is inseparable from this efficient and reliable means.

The history of humans using electricity to transmit information began with the telegraph, which was invented by the American Morse in 1834. The telegraph is a way of transmitting information using symbols, the so-called digital method. But after the American Bell invented the telephone in 1876, analog methods took over the absolute advantage in the field of telecommunications.

In the 1950s, the emergence of PCM technology gave another glimmer of hope to digital communication methods. But its real growth and development, and even its domination of the world, mainly rely on the power of electronic computers. Therefore, some people regard Camp;C, the integration of communications and computers, as an important symbol of a new revolution in the history of human information.

When we talk about telecommunications today, it is indispensable to talk about the wide application of computers in various telecommunications fields. It not only plays a key role in realizing the intelligence of telecommunications, but also its introduction makes telecommunications more and more popular. Instead of simply transmitting information, it also adds the functions of information processing and storage.

Telecommunications began with wired communication using metal wires. By the end of the 19th century, wireless telegraphy appeared, making wireless communication a fad. However, due to some inherent weaknesses in wireless communications that were difficult to overcome under the technical conditions at the time, for a long time it was generally in a standby position except for specific conditions such as navigation and disaster relief.

Due to the development of technology, not only wireless methods have made a comeback, but also new communication methods using optical fiber as the transmission media have emerged. This not only brings about the diversification of telecommunications transmission methods, but also lays the material foundation for the high speed and personalization of telecommunications.