1.In fact, most of these services were not directly part of the PSTN at all, and involved a radio channel patched into a phone line.事实上，大多数这些服务没有直接的PSTN网的一部分，在所有，并参与一个电台频道补丁到电话线。

2.PSTN spreads all over the country, which insures that the address of lifts to be monitored is not limited.PSTN遍布各处，保证了被监控的电梯所在地点不受限制，而且它现成可用，数据传输可靠。

3.Such a system can stand alone, but often it is interconnected with a fixed system such as the public switched telephone network (PSTN).这样的系统可以是独立的，但常常和固定电话系统如公用交换电话网络（PSTN）连接起来。

4.The company establish connection with PSTN through a VOIP carrier's network.公司通过VOIP运营商网络建立与PSTN连接。

5.Simultaneously, a PSTN interface system is controlled by a baseband processor of a wireless receiving and transmitting module.同时，PSTN接口系统的控制是通过无线收发模块的基带处理器来控制的。

6.So far, facsimile is mostly carried on PSTN (Public Switched Telephone Network), which brings numerous expenses together with the service.目前传真业务主要在公共电话网上承载，这种传真业务的使用给企业带来了巨额的支出。

7.Following is an overview of how the analog PSTN implements signaling and media transport operations.以下是如何实现的模拟PSTN信令和媒体传输操作的概述。

8.The call is sent to its appropriate destination within the private network or out onto the Internet or PSTN.最终呼叫被送到专网中的目的地或者外送到因特网或传统电话网。

9.The number of lines and traffic of the Public Switched Telephone Network (PSTN) network have also been decreasing.公共电话交换网（PSTN）的线路和流量也在减少。

10.The system combines Bluetooth and ASP. NET with the PSTN, Internet, sensors Network to form the core of Intelligent Residential System.该系统将蓝牙通信技术与有线电话、互联网和传感网络融为一体，组成智能家居系统的核心。