“八五”国家重点科技攻关项目———ＩＳＤＮ成果简介邮电部科技司姜涌我国从“七五”开始进行ＩＳＤＮ技术的研究，“八五”加大了这方面的研究力度，目的是通过攻关，加快掌握ＩＳＤＮ的实用化技术，为我国在“八五”后期或“九五”期间局部地区的ＩＳＤＮ建设提供实用... “Eighth Five-Year” National Key Scientific and Technological Project --- ISDN Achievements Introduction Jiang Yong, Ministry of Science and Technology, Ministry of Posts and Telecommunications, started his research on ISDN technology from the “Seventh Five-Year Plan”. The Eighth Five-Year Plan intensified the research efforts in this field through Tackle key problems and speed up the practical application of ISDN technology, so as to provide practical solutions for our ISDN construction in some areas in the late “Eighth Five-Year Plan” period or during the “Ninth Five-Year Plan” period.