日新月异的高技术正在导致全球通信手段的重大革新,新型高效通信工具迅速普及。数据通信,即在通信网上全面使用数字传输、数字交换和数字终端等技术。迄今通信网数字化程度最高的是法国,本地交换达70%,长途交换达74%;本地传输达94%,长途传输达74%。综合化,就是把来自各种信息源的业务综合在一个通信网中传送加工, The rapid changes in technology are leading to major innovations in global communications and the rapid popularization of new and efficient communications tools. Data communications, that is, full use of digital transmission in the communications network, digital switching and digital terminals and other technologies. So far the highest digitization of communications networks in France, the local exchange of 70%, long-distance exchange of 74%; local transmission of 94%, long-distance transmission of 74%. Integration, that is, the business from a variety of information sources integrated in a communication network transmission processing,