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| Subject | Chinese | English |
| telecom. | 光同步数字网络 | optical synchronous digital network |
| el. | 同步光纤网络/同步数字系列用户-网络接口 | SONET/SDH user-to-network interface |
| el. | 同步数字传输网 | synchronous digital transmission network |
| tech. | 同步数字体系管理子网 | synchronous digital hierarchy management sub-network |
| tech. | 同步数字体系管理网 | synchronous digital hierarchy network |
| el. | 同步数字系列/同步光纤网上运行点对点协议 | PPP over SDH/SONET |
| el. | 同步数字系列管理子网 | SDH management subnetwork |
| gen. | 同步数字系列管理网 | SDH management network |
| el. | 同步数字系列网上传送数据［信息］包 | packet over SDH |
| el. | 同步数字网 | synchronized digital network |
| telecom. | 同步数字网 | synchronous digital network |
| telecom. | 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) |
| tech. | 非同步数字传输网络单元 | non-synchronous digital hierarchy network element |
| el. | 非同步数字系列网络单元 | non-SDH network element |