| 1. | Private automatic branch exchange pabx 专用自动小交换机 |
| 2. | Private automatic branch exchange , pabx 用户自动交换机 |
| 3. | Private automatic branch exchange 专用自动电话交换机 |
| 4. | Development of unattended private automatic branch exchanges . two - line monophones introduced 开发无人自动小交换机。二线制收发话机问世。 |
| 5. | Generic specification for stored program control digital private automatic branch telephone exchange system 程控数字用户自动电话交换机通用技术条件 |
| 6. | General specification for stored program control analogue private automatic branch telephone exchange system 程控模拟用户自动电话交换机通用技术条件 |
| 7. | Rapid expansion in the use of private automatic branch exchanges . development of remote alarm equipment for unattended exchanges 用户自动交换机迅速普及。开发无人交换机远端报警设备。 |
| 8. | Public automatic branching exchange ( pabx ) a telephone system installed in atcx for efficient communications between operational positions in the atcx and external parties through the public service telephone network . microwave link system ( mls ) 这套在航空交通管制大楼内安装的电话系统,可为管制岗位提供更有效率的内部通讯,同时,透过公共电话网络服务,也可对外作快捷的通话。 |