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世界上海拔最高的兰州—西宁—拉萨同步数字体系(SDH)光缆传输干线工程初步设计已由邮电部设计院完成,目前在京通过建设单位和专家会审,工程计划于1997年内开工,1998年建成投产,这预示着我国最后一个没有国家光缆干线的省会城市拉萨,不久将会实现光缆干线传输,届时,我国的光缆干线传输网将把全国31个省、自治区(直辖市)全部连通。 兰州—西宁—拉萨光缆通信干线工程是国家“九五”计划重点项目,它北起甘肃省会兰州,经临夏、平安、西宁、海北
The preliminary design of Lanzhou-Xining-Lhasa Synchronous Digital Hierarchy (SDH) optical transmission line project with the highest elevation in the world has been completed by the Design Institute of the Ministry of Posts and Telecommunications. Currently, the project is scheduled to be audited by construction units and experts in Beijing. The project is scheduled to start operation in 1997 and put into operation in 1998 This indicates that Lhasa, the capital city without a national optical fiber trunk line in our country, will soon realize the transmission of fiber optic trunk lines. At that time, China’s optical fiber trunk transmission network will connect all 31 provinces and autonomous regions (municipalities directly under the Central Government) across the country. Lanzhou - Xining - Lhasa cable communication trunk project is the national “Ninth Five-Year Plan” key projects, it started north Lanzhou, Gansu Province, Linxia, Ping An, Xining, Haibei