| 1. | Frame structure for synchronous digital hierarchy signal
同步数字体系信号的帧结构 |
| 2. | Telecommunications - digital hierarchy - formats specifications
电信.数字层.格式规范 |
| 3. | Telecommunications - digital hierarchy - electrical interfaces
电信.数字分层.电气接口 |
| 4. | Synchronous digital hierarchy cross - connect sdxc
同步数字系列交叉 |
| 5. | Lcas digital hierarchy - formats specification virtual concatenation and lcas
数字分级.格式规范 |
| 6. | Synchronous digital hierarchy bit rates
同步数字体系的比特率 |
| 7. | Basic multiplexing structure for synchronous digital hierarchy signals
同步数字体系信号的基本复用结构 |
| 8. | Specifications for synchronous digital hierarchy multiplex equipment
同步数字体系sdh复用设备技术要求 |
| 9. | Pdh pseudo - synchronous digital hierarchy
准同步数字系列 |
| 10. | Pdh pseudo synchronous digital hierarchy
准同步数字序列 |
