整个90年代是计算机网络通信技术迅速发展的年代,其特点是以计算机技术、光纤传输技术为中心,向着高速、多媒体通信的方向发展。由于模拟信号数字化技术的普及应用,原先是单独的计算机数据通信,现今可以和语音、视频等传统的模拟信息通信相结合,使计算机通信和电话、传真、广播电视等通信方式互相结合起来,逐步合成单一化的通 Throughout the 90’s is the era of rapid development of computer network communications technology, its characteristics is to computer technology, optical fiber transmission technology as the center, toward high-speed, multimedia communications in the direction. Due to the popularity and application of analog signal digitization technology, originally a separate computer data communication, nowadays can be combined with traditional analog information communication such as voice and video, so that computer communication and telephone, fax, radio and television and other means of communication are combined with each other gradually Synthesis of a single pass