电话交换

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

323标准的附加业务的信念结构和业务设计，并将其与传统电话交换业务模型进行了比较。

The paper focuses on the signaling structure and service design based on H.323 , and compares with the PSTN service model .

你可否在电话交换台那儿暂且替我应付一下？我跑出去寄一封信。

Will you cover for me at the telephone switchboard while I run out to post a letter ?

PSD在电话交换设备用户信号发生器中的应用

Application of PSD in user signal generator of portable telephone switch

介绍了一种用DSP设计的基于公用电话交换网络（PSTN）的安全通信系统，整个方案主要用于保证语音、数据和传真等三种通信的安全。

This application report describes and characterizes secure communication systems over the Public Switched Telephone Network ( PSTN ) .

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 .

本文讨论了微型机/终端在电话交换网上通信用调制解调器（MODEM）的实用技术，以保证可靠的连接与传输。

This paper presents a practical technique about microcomputer / terminal remote communication MODEM for telephone switch network . This technique affords reliable connection and transmission .

Z-80微型机控制的长途电话交换台系统

Control System with Z-80 Microcomputer for Long Distance Telephone Exchange

CTI技术将语音服务和数据服务融合在一起，综合了计算机技术与电话交换技术的优势，提供丰富的通信调度控制功能。

CTI integrates the advantages of telephony service and data service and can provide abundant communication and control functions .

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 ) .

该系统使用数字信号处理器TMS320C31开发板在PC机WINDOW平台下实现了与人无关连续命令语音识别，完成拨号、进行电话交换。

Used developing board of digital signal processor ( TMS320C31 ), speaker independent continuous speech recognition system is implemented on WINDOW platform of PC.

IPCentrex正是这些新业务当中的一种，它能基于分组网络提供强大的电话交换和服务功能，还可以减少管理负担，降低应用成本。

IP Centrex is among those services , which can provide innumerous packet based exchange and service . IP Centrex can also reduce management load and application cost .

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 .

在传统的公共电话交换网络（PSTN）中使用H.323对多媒体会话进行控制，而在如今的IP网络中则使用主流的简单且易于扩展的会话初始协议（SIP）。

We used the H.323 to control the multi-media session in the traditional Public Switched Telephone Network ( PSTN ) while the popular and simple Session Initiation Protocol ( SIP ) in the IP network .

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 .

文章比较了电话交换、广播电视接入方式和分组交换技术的特点，提出了综合这三种业务的面向连接的NGN网络的路由交换与分配方案。

By comparing the technology characteristics of telephone switching , broadcast and television access mode , and packet switching , here propounds a scheme of route switching and allocation of connecting orienting next generation net witch synthesizes the three kinds of services .

本文介绍一种应用GPSS-F仿真语言建立一个电话交换系统仿真模型的基本方法。

This paper presents a basic method for establishing the simulation models of a telephone switching system by using GPSS-F simulation language .

在移动短消息日渐被人们所接收，并在国内外通信市场取得巨大成功以后，中国电信推出了固网短信业务作为公共电话交换网络（PSTN）的一项增值业务。

Short Message Service ( SMS ) over mobile network has become one of the most popular wireless services . Recently , China telecom offers SMS as a profitable added-value service that allows text messages to be sent and received over the PSTN .

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 .

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

用变换型方法模拟开发电话交换系统

Simulation of developing a telephone exchange system by transformational method

建立电话交换系统仿真模型的方法

A Method for Constructing the Simulation Models of a Telephone Switching Systems

用模拟电话交换码的方式来拨打全球免费电话.

Mimicking telephone router codes To make free calls around the world .