| 1. | Digital line signalling for intertoll exchange
长途电话交换局间数字型线路信号 |
| 2. | Digital line - termination unit dltu
数字线路终端单元 |
| 3. | Digital line signalling for manual toll exchange to local exchange
人工长途电话局至市话局局间中继数字型线路信号 |
| 4. | Quality requirement for digital line topographic map , digital elevation model
数字线划地形图数字高程模型质量要求 |
| 5. | Isdn is used on digital lines as well as on voice - grade lines
整合服务数位网路在数位线路上被使用就如同在声音等级的线路上。 |
| 6. | Digital line system
数字有线系统 |
| 7. | Digital line section
数字有线段 |
| 8. | Digital line path
数字有线通道 |
| 9. | Interoffice junction digital line signalling system for telephone automatic switching network
电话自动交换网局间中继数字型线路信号方式 |
| 10. | Performance requirements for digital line systems on coaxial pair cables used in telecommunication network
同轴电缆数字线路系统进网要求 |
