1.本世纪80年代,网络数字化改变了长期以来模拟网多网并存的格局。随着全球经济一体化,数据业务迅速增长,特别是80年代中后期PC机使用在全球普及,促使网络业务的重心从电话网转向数据网,网络技术从电路交换转向分组交换,从立足于电话网的综合业务传送转向立足于数据网的综合业务传送。 2.Internet大潮席卷全球,促使通信业务市场迅速向信息业务市场 1. 80s of this century, digital network has changed a long time simulating multi-network coexistence pattern. With the global economic integration, the rapid growth of data services, especially in the mid and late 80’s PC use in the world, prompting the focus of network services from the telephone network to the data network, network technology from circuit switching to packet switching, based on the phone Network integrated service delivery shift based on the data network integrated service delivery. 2. Internet tide swept the world, prompting the rapid development of communications services market to the information business