 |
| Chinese | English |
| 同步传输信号等级 1 | synchronous transport signal level 1 |
| 数字信号等级/数据服务等级 | digital signal level/data service level |
| 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 |
|
| Chinese | English |
| 同步传输信号等级 1 | synchronous transport signal level 1 |
| 数字信号等级/数据服务等级 | digital signal level/data service level |
| 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 |