| 1. | Pstn public switched telephone network
公用交换式电话网 |
| 2. | Pstn : public switch telephone network
公用交换电话网 |
| 3. | The indicators in this category refer to the volume of traffic carried over the public switched telephone network
此类指标是指公用交换电话网上承载的话务量。 |
| 4. | The total capacity of public switching exchanges corresponds to the maximum number of main lines that can be connected
公用交换局总容量指的是可连接的最大主线数。 |
| 5. | In public switched systems , a charge based on time and distance for a connection beyond an exchange boundary
在公用交换系统中，一种对局外电话连接按时间和距离的长短而定的收费。 |
| 6. | In this programme we look at the new commercial property standard enquiries and provide an update on pisces - the new electronic standard for property information
专业人士探讨商业楼宇标准调查及物业资讯系统公用交换标准的最新产业资料电子标准。 |
| 7. | The number of telephone lines connecting the subscriber ' s terminal equipment to the public switched network and which have a dedicated port in the telephone exchange equipment
连接用户终端设备和公用交换网并具有一个电话交换设备专用端口的电话线数。 |
| 8. | Dte interface between data terminal equipment and data circuit - terminating equipment for terminals operating in the packet mode and accessing a packet switched public data network through a public switched telephone network or anintegrated se
经公用交换电话网或综合业务数字网或电路交换公用数据网接入分组交换公用数据网的分组式数据终端设备 |
| 9. | The control center and the on site node is connected by modem through pstn ( public switched telephone net ) . the control center is responsible to setup the connection , the on site node is responsible to answer the call and then the data are transferred
控制中心和现场节点利用modem通过pstn (公用交换电话网)相连，由控制中心主动建立链接，现场节点接到呼叫后应答进行数据传输，从而实现远距离监控的目的。 |
| 10. | The current communication network in the world consists of many private networks and public switching networks . these private networks are connected by switching networks and separately managed . some private networks have built management system , but some have n ' t
当今世界上现有的通信网一般是由许许多多个独自管理的专用网和多个公用交换网相互联组成的，有的专用网已经建立起网络管理系统，有的则正在建立之中。 |
