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| Chinese | English |
| 伪同步数字系列 | pseudo-synchronous digital hierarchy |
| 光同步数字网络 | optical synchronous digital network |
| 同步数字交叉连接设备 | synchronous digital cross connection equipment |
| 同步数字分层体系 | synchronous digital hierarchy |
| 同步数字网 | synchronous digital network |
| 数字交换网络帧和复帧同步信号插人功能 | GAZPACHO (Generation of frame code, Alignment of frames, Zero string suppression, Polar conversion, Alarm processing, Clock recovery, Hunt during reframe, Office signaling 帧码发生，帧定位，连零抑制，码型变告警处理,时钟提取恢复，帧同步,局信令) |
| 数字同步 | digital synchronization |
| 数字同步 | digilock |
| 数字同步信号 | digital sync signal |
| 数字复接同步器 | digital multiplexing synchronizer |