日本从旭川到鹿儿岛纵贯全国的光缆干线建设完成,1985年2月8日全线开通使用并举行了庆祝仪式。 日本电报电话公司为在全国建成综合信息网,积极推进通信网络数字化,从1983年3月东京—横浜间的工程开始,到1985年2月完成札幌—旭川段工程,经过两年时间建成了这一作为全国通信大动脉的光缆干线。这一纵贯全国的光缆线路全长约3400km,连接全国34个 Japan completed the construction of optical fiber cables throughout the country from Asahikawa to Kagoshima. On February 8, 1985, Japan opened its doors and celebrated the ceremony. Nippon Telegraph and Telephone Corporation in order to establish a comprehensive information network in the country, and actively promote the digitization of communications networks, from March 1983 Tokyo - Yokohama works started in February 1985 to complete the Sapporo - Asahikawa section of the project, after two years built this As a major artery of the country’s optical cable trunk. The length of the national optical cable line length of about 3400km, connecting the country 34