电话交换网

电力企业经过多年的建设，已经形成了庞大的通信网络，目前已建成了相当规模的电话交换网、光纤传输网、数据通信网、计算机通信网以及配套支撑网等。

Under decades of years ' construction , the Electric Power Corporation has formed a huge telecommunication network , and now has built the PSTN , Fiber Transportation Network , Data Communication Network , Computer Telecommunication Network and supporting networks , etc.

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 .

公共电话交换网（PSTN）的线路和流量也在减少。

The number of lines and traffic of the Public Switched Telephone Network ( PSTN ) network have also been decreasing .

本建议描述用于公众电话交换网（PSTN）的可视图文业务的高速终端接入能力。

This Recommendation describes a high-speed terminal access to videotex services for use on the Public Switched Telephone Network ( PSTN ) .

在传统方式下，话音业务和数据业务是由两个互相独立的网络&公共电话交换网（PSTN）和数据通信网分别提供的。

In traditional way , voice service and data service are provided independently by two different networks-PSTN ( Public Switched Telephone Network ) and data communication network .

公共电话交换网（PSTN）是最广泛使用的通信线路，因此在PSTN线路上传输视频具有广阔的应用前景。

It is most extensively used Lines of Communication to Public Switched Telephone Network ( PSTN ), hence the video surveillance system based on PSTN possesses widespread application prospects .

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 .

根据军用电话交换网性能管理的实际需求，遵循TMN原理，应用UML建模技术建立了军用电话交换网性能管理的被管对象和管理系统的静态模型。

An UML ( Unified Model Language ) static model of the performance management objects and system for military switched telephone network has been modeled , according to the real demand of performance management for military switched telephone network and following TMN ( Telecommunication Management Network ) principle .

西安电力行政电话交换网的改造与扩容

Reconstruction and upgrading of Xi ′ an power administrative PBX network

关于天津电话交换网规划中涉及的几个问题

Several Problems Relating to the Planning of Tianjin Telephone Switching Network

长途电话交换网网管系统的设计与实现

Design and Realization of the Management System for Toll Telephone Network

铁路电话交换网的现状与发展

The Current Status and Development of Railway Telephone Switch Network

峰峰集团公司电话交换网的优化方案比较

Compare with optimization plans of telephone exchange network in Fengfeng Group company

兰州供电局电力调度电话交换网的改造

Reconstruct of Lanzhou electric power dispatching exchange network Phone Calls

电话交换网业务预测方法讨论

Discussion on Forecasting Methods for Telephone Switching Network Services

电话交换网内话音-数据混合传输系统及其改进

A Voice-Data Multiplexing Transmitting System and Its Improvements

建成了世界一流的程控电话交换网、数据通信网和数字传输网，实现了高青与世界信息资源的同步共享。

Class program-controlled net , data net , digital net and reached the aim to share information resources in step with the world .

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 .

数据通信中，通过公共电话交换网，实现一个终端和一个服务部门、网络或计算机的连接。

In data communication , the connection through the public switched telephone network from a terminal to a service , network or computer .

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 .

探讨了如何在长途电话交换网中应用单纯形算法解决动态路由问题，并介绍了算法运行情况和运行结果。

This paper discusses how to solve dynamic routing problem with simplex algorithm in a long-distance telecommunication switch network . The computed results are shown in the paper .

调度电话交换网是电网安全、稳定运行的重要指挥系统，是电网的中枢神经，电网调度的安全是电网运行的可靠保障。

Dispatching exchange network is the network safe and stable operation of a major chain of command , is the power of the central nervous system , dispatching security is a reliable power grid protection .

并通过对本单位所做的电话交换网改造方案，具体说明了在实际环境中如何进行SDH/MSTP传送网的设计，以及如何建设一个基于SDH/MSTP技术的电话交换网。

Using the network design of our company to demo how to SDH / MSTP design in a real world , and how to build a telephone switching network based on SDH / MSTP technique .

为了适应未来试验靶场指挥通信网络建设的需要，在研究了国内通信专网发展的基础上，本文提出了一种实现指挥调度网和电话交换网融合的解决方案。

Depending on the study of domestic special communication network , this paper proposes a master design ideals of dispatch and telephone integrated networks according to the demand for construction of command communication network in the future .

分析了偏僻高山上通信机房和电气房要进行监控的内容和特点等，探讨了用经济、可靠的电话交换网实现远程监控自动化的方案和实施办法。

This paper analyzes the items and technical characteristics of supervisory control of the communication room and electricity room in remote mountainous districts , and explores the implementation of remote supervisory control automation by the economical and reliable telephone exchange net .

ΔM与PCM兼用的数字电话模拟交换网

A Telephone Network Consisting of △ M and PCM Hybrid Digital Carrier and Analog Switching