现代通信技术第1节SDH概述，网络通信的发展与趋势，很好的资料
2016-03-21 16:23
SDH产生的技术背景是由于传统的PDH传输体制的缺陷体现在以下几个方面：1. 接口方面2. 复用方式3. 运行维护方面4. 没有统一的网管接口由于以上这种种缺陷，使PDH传输
2009-07-31 11:02
Contains SDH operator information.
2019-03-07 13:31
下一代SONET/SDH设备
2019-09-05 07:05
The SONET/SDH Frame Generator (referred to as the Frame Generator) is a software application for generating SONET and SDH frames fo
2019-07-15 11:19
Contains SDH reference information.
2019-02-28 16:45
Packet over SONET/SDH (POS) has emerged as the technology of choice for high-speed routers
2019-04-23 08:00
同步数字传输体系(SDH):同步数字传输体系（SDH）概述，SDH的技术背景，SDH的缺点，
2009-08-05 23:26
and sub-systems for SONET/SDH transmission equipment. The creation and real-time editing of custom patterns...
2019-05-31 07:15
Testing SDH network elements for compliance with the relevant standards is a complex
2019-02-14 12:06
