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１９９９年１１月４日，信产部电信科学技术第五研究所开发的“Ｂ－ＩＳＤＮ宽带接入技术研究与设备研制”系统通过验收。参加验收的有科技部高新技术发展及产业化司、中科院高技术研究与发展局、北京邮电大学、中国邮电电信总局、中国电信数据通信局、北京电信管理局、北京电
On November 4, 1999, the “B-ISDN Broadband Access Technology Research and Equipment Development” system developed by the Fifth Institute of Telecommunications Science and Technology of the Ministry of Information Industry passed the acceptance test. Ministry of Science and Technology to participate in the acceptance of high-tech development and industrialization division, Chinese Academy of Sciences, High Technology Research and Development Bureau, Beijing University of Posts and Telecommunications, China Posts and Telecommunications Administration, China Telecom Data Communications Authority, Beijing Telecommunications Authority, Beijing Electric