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从语言的产生、文字的创造、印刷术的发明到电报、电话的电气通信时代的到来,从指南针的发明到全球定位系统,从无绳电话、可视电话等各种多功能电话机、袖珍寻呼机、传真机到各种数据通信系统、会议电视系统等的使用。直到今天的电子计算机的普及和微波、卫星、光纤、移动通信技术的飞速发展,人类通信产生了革命性的突变,从根本上改变了传统的信息传输手段。人类每时每刻都通过已建成的覆盖全球的各种通信网,包括地面的、海底的、空
From the invention of the compass to the global positioning system, from the generation of languages, the creation of characters, the invention of printing to the telegraph, and the telegraphic era of telephone communication, various multi-function telephone sets such as cordless phones and video telephones, pocket pagers , Fax machines to a variety of data communications systems, conferencing TV systems. Until today, the popularity of electronic computers and the rapid development of microwave, satellite, optical fiber and mobile communication technologies have revolutionized human communication and fundamentally changed the traditional means of information transmission. Human beings pass the established communication networks covering the world, including the ground, the seafloor, the air space