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[Documents] sdh原理 DL : 0: sdh原理经典介绍。
Date : 2009-03-20 Size : 4.7mb User : chenglongyin6@163.com
[Documents] distalwave DL : 0: 早期的数字传输系统主要是数字微波通信系统，后来发展起来的SDH系统是现代电信网中数字信号传输的基本模式-early digital transmission system is mainly digital microwave communication system, Later development for the SDH system is a modern telecommunications network digital signal transmission basic model
Date : 2025-12-25 Size : 1.9mb User : 陈正方
[Documents] SECTION1 DL : 0: SDH(Synchronous Digital Hierarchy) A communication book that shows how digital technology application are applied in response to the demand of the increased band width
Date : 2025-12-25 Size : 91kb User : Nkubito
[Documents] 变电站SDH设备技术规范 DL : 0: 电力系统变电站侧SDH设备规范,配线架DDF、ODF(SDH equipment specification for substation side of power system)
Date : 2025-12-25 Size : 133kb User : 阿民