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| Subject | Chinese | English |
| tech. | 信号强度等级 | signal strength scale |
| adv. | 信号等级 | signal grade |
| multimed. | 同步传输信号等级 1 | synchronous transport signal level 1 |
| multimed. | 数字信号等级/数据服务等级 | digital signal level/data service level |
| multimed. | 数字信号交接等级 1 DTCP digital transmission copy protection 数字传输复制保护 | digital signal cross-connect level 1 |