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世界上速率最高的ＡＴ＆Ｔ ＳＤＨ传输系统将装备我国京九广干线邮电部电ＡＴ８Ｔ近日在京签署了ＳＤＨ传输项目合同，ＡＴＴＳＤＨ传输系统将装备我国京九广干线，这使我国贯穿南北的铁路大动脉将配备一条世界上技术最先进、设备最复杂、距离最长．速率最高（２．５Ｇｂ...
The AT & T SDH transmission system with the highest rate in the world will be equipped with the AT8T of China’s Ministry of Posts and Telecommunications of the Beijing-Kowloon Railway recently signed a SDH transmission project contract in Beijing. The ATTSDH transmission system will be equipped with China’s Beijing-Kowloon Route, which will allow our country to cross the north- A world’s most technologically advanced, most complex equipment, the longest distance. The highest rate (2.5Gb ...