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通信,是人们传递语言、文字、图像、数据等信息的重要方式。 通信的历史源远流长。有了人类社会,就有了通信。古时候,人们靠步行、奔跑、骑马递送情报、公文和信件,也曾用信标、战鼓、烽火、信鸽、风筝、驿站通信等多种方式传递消息。19世纪中叶,随着电磁理论的创立和无线电技术的运用,发明了电报和电话,找到了远距离快速方便地传递信息的工具,开始了电气通信和无线电通信时代。 100多年来,随着生产和科学技术的不断发展,通信技术日新月异。特别是近年来光纤通信的出现,使通信技术出现了一场革
Communication is an important way for people to transmit information such as languages, texts, images and data. The history of communications goes back to ancient times. With human society, there is communication. In ancient times, people used to send messages, official documents and letters by foot, run and horsemanship. They also used various methods such as beacons, war drums, war bells, pigeons, kites, and post stations to transmit messages. In the mid-19th century, with the creation of electromagnetic theory and the use of radio technologies, telegrams and telephones were invented, tools for transmitting information quickly and easily over long distances were found, and the era of electrical and radio communications began. For more than 100 years, with the continuous development of production and science and technology, communication technology is changing with each passing day. In particular, the advent of optical fiber communication in recent years has brought a revolution in communications technology