摘要
本文主要描述了中国国家公用通信网的发展与现状。介绍了目前现存在四种公用交换通信网 :PSTN (公用电话交换网 )、PSND(公用分组交换网 )、DDN(公用数字数据网 )及移动通信网的基本特点、提供的服务以及目前的发展状况。最后还介绍了中国 Internet的发展情况及其骨干网 CHINANET的服务与使用情况。
This paper describes the present situation and development of China Public Communication Networks.The four kinds of public switched communication networks are PSTN (SPC systems), PSDN, DDN, and mobile systems.Their basic features and development in China,and the CHINANET-the backborne Network of China Internet, its services and user's application are also introduced.
出处
《现代图书情报技术》
CSSCI
北大核心
1997年第1期14-17,共4页
New Technology of Library and Information Service
