public telephone system

In the VoIP system based on SIP, the SIP/ PSTN gateway equipment is used for signaling and media conversion between IP network and public switched telephone network ( PSTN).

在基于SIP协议的VoIP系统中，SIP/PSTN网关设备用来实现IP网络和公用交换电话网络（PSTN）之间的信令和媒体转换。

Research on Rational Setup of Public Telephone System at Subway Stations

地铁车站公用电话系统合理设置的研究

The research results herein can offer beneficial reference in the development public telephone system for the telecommunication operator.

本文的研究成果为电信运营商在发展公用电话系统中可提供有益的参考。

In this paper, the analog to digital evolution process of the public cordless telephone system is reviewed and several digital cordless telephone technologies such as CT2, DECT, PHS and PACS are analysed and compared. The cordless telephone development strategy is put forward.

本文回顾了公用无绳电话系统从模拟到数字的演变过程，分析和比较了CT2、DECT、PHS和PACS等几种数字无绳电话技术，进而提出了我国发展无绳电话的策略。

A telephone for fire department use with controlled access to the public telephone system.

消防部门使用的电话,具有到公共电话系统的可控制入口.

A new ECG teletransmission system based on embedded modem and public switched telephone network ( PSTN) is presented, which consists of family unit, PSTN and center workstation.

本文介绍了一种通过嵌入式调制解调器与公共电话网实现心电数据远程传输的系统，系统由家庭单元、公共电话网和中心工作站组成。

Research and Implementation of Web Services Integrated Platform in Intelligent Public Telephone System

智能公话系统中Web Services整合平台研究与实现

Research and Implementation of Distant Controlling System Using Public Telephone Network

公用电话远程控制系统的研制和实现

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.

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。

Gateway is the key equipment for LAN telephone communicate with the Public Switched Telephone Network, it affect the performance of the system directly.

本网关是局域网电话和公共电话网互通的关键设备，它直接影响到整个系统的运行和性能。

The Intellectual Pre-alarm System Based on the Public Telephone Network

基于公用电话网的远程拨号智能预警系统

The lC card public payphone system is a new gen-eration of public telephone equipment developed to accomodate the development of the public telephone service in China.

集成电路（IC）卡公用付费电话系统是继投币电话、磁卡电话之后适应我国公用电话业务发展需要的新一代公用电话设备。