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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 51281-2018 |
Synchronous Digital Hierarchy (SDH) Optical Fiber Transmission System Engineering Acceptance Criteria 同步数字体系（SDH）光纤传输系统工程验收标准 |
China National Standards Synchronous Digital Hierarchy |
 English PDF |
| GB/T 15409-2008 |
Frame structure for Synchronous Digital Hierarchy signal 同步数字体系信号的帧结构 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
| GB/T 16712-2008 |
Characteristics of Synchronous Digital Hierarchy (SDH) equipment functional blocks 同步数字体系（SDH）设备功能块特性 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
| GB/T 15940-2008 |
Basic multiplexing structure for Synchronous Digital Hierarchy signals 同步数字体系信号的基本复用结构 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
| GB/T 14731-2008 |
Synchronous Digital Hierarchy (SDH) bit rates 同步数字体系（SDH）的比特率 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
| GB/T 16814-2008 |
Methods of measurement for Synchronous Digital Hierarchy (SDH) optical fiber cable line system 同步数字体系 (SDH) 光缆线路系统测试方法 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
| GB/T 15941-2008 |
Requirements for Synchronous Digital Hierarchy (SDH) Optical Fiber Cable Line Systems 同步数字体系（SDH）光缆线路系统进网要求 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
| GB/T 20185-2006 |
Optical interface requirements for equipments and systems relating to the Synchronous Digital Hierarchy 同步数字体系设备和系统的光接口技术要求 |
China National Standards Synchronous Digital Hierarchy |
English PDF |
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