公用电话交换网

在公用电话交换网（PSTN）线路上建立数据传输的过程。

The process of setting up a data transfer on a PSTN line .

以一个电梯远程监控系统为例，介绍了计算机与PLC的串行通信技术，计算机之间通过公用电话交换网的通信技术。

With an example of elevator remote monitoring system , introduced the technology of serial communication between the computer and the PLC , and the technology of communication between computers through the PSTN .

讨论了一种在PSTN（公用电话交换网）上实现基于PC的实时视频通信系统的方案，它将对在现有窄带通信网上实现可视电话、移动可视通信、远程监控等业务有重要意义。

A discussion is devoted to PC based scheme to implement real time video communication over PSTN . It is significant for the realization of videophone , mobile video communication and remote monitoring over N ISDN .

本文讨论的POS税控盒连接在POS机上，通过公用电话交换网（PSTN）和税务部门的主机进行数据通信，完成税务部门对POS机数据的查询工作。

In order to finish the data checking , the POS tax box system communicates with PC of tax department through PSTN , it is connected with POS in the other hand .

该文讲述了如何利用摄像机、计算机、极低速传输线路PSTN（公用电话交换网）及互联网络构建一种智能型的、远程分布式的、实时可视化基于静态现场的监控系统。

This article represents how to construct a intelligent , visible , distributed security monitor system of remote static scene by using video camera , computer , low-band network PSTN ( Public System of Telephone Network ) and Internet .

本文针对现场的需求，利用无处不在的公用电话交换网，作为传输通道，创新性地设计了远程分布式三级监测系统。

The author innovates and designs long-distance distributed three level monitoring system in the paper by using PSTN as channel according to require .

系统4条中继线可与电子对抗系统站间通信网的上级指挥中心连接，也可入公用电话交换网。

Relay line of the system were linked to superior command center of communication network between stations , and linked to public phones witching network .

综合业务数字网具有容易访问公用电话交换网且传输容量大、可靠性高等特性。

Integrated Services Digital Network ( ISDN ) is easy to access Public Switched Telephone Network ( PSTN ) and has larger transmission and capacity and higher reliability .

GB/T16813-1997无线电寻呼系统与公用电话自动交换网的接口技术要求及测试方法

Technical specifications and test methods of the interface of radio paging system and PSTN

GB/T7437-1987公用模拟长途电话自动交换网传输性能指标

The transmission performance objectives for public analogue toll telephone automatic switching network