This paper presents the structure and working principle of a remote intellingent terminal based on a public switched telephone network(PSTN) along with a method of setting up remote data communications by using the modem MSM7512B and DTMF MT8888 chips.
介绍了一种基于公用交换电话网(PSTN)的远程智能终端的结构和工作原理,提出了由单片ModemMSM7512B和双音多频(DTMF)MT8888建立远程数据通信的方法,实现了对现场设备运行状态的检测、控制和远程管理等功能。
With the rapid development of network technology, DMISs(Distributed Management Information Systems)are widely used and quite a number of them are connected via PSTN(Public Switched Telephone Network).
针对分布式管理信息系统通过PSTN(公用电话交换网)互联时存在的带宽低、易受干扰和安全隐患等问题,结合现代密码技术,提出了一种基于自治系统(AutonomousSystem)和代理(Agent)技术的远程分布式安全应用方案。
This application report describes and characterizes secure communication systems over the Public Switched Telephone Network (PSTN).
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。
An Integrated Services Digital Network device on a public switched telephone network.
公用交换电话网上的综合业务数字网设备。
The number of telephone lines connecting the subscriber's terminal equipment to the public switched network and which have a dedicated port in the telephone exchange equipment.
连接用户终端设备和公用交换网并具有一个电话交换设备专用端口的电话线数。
Intranet Telephony: Will your LAN Replace Your PBX?
内部网电话：局域网会替代用户电话交换机吗？
Intranet Telephony: Will your LAN Replace Your PBX? (2)
内部网电话：局域网会替代用户电话交换机吗？（2）
If not, the call went to the company's in-house telephone switching system, or PBX (private branch exchange).
如果没有，电话就转到公司内的电话交换系统（即PBX，用户电话交换机）。
Subscriber line signalling system for telephone automatic switching network
GB3378-1982电话自动交换网用户信号方式
Application Analysis of the Signaling System in Telepone Exchange Network;
信令系统在电话交换网中的应用分析
The transmission performance objectives for public analogue toll telephone automatic switching network
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 mixed analogue-digital public telephone automatic switching network
GB/T14133-1993数模混合公用电话自动交换网传输性能指标
The process of setting up a data transfer on a PSTN line.
在公用电话交换网（PSTN）线路上建立数据传输的过程。
Megaco to bridge PSTN, IP networks
将公共电话交换网与IP网相联的新标准——Megaco
Research on Establishing Video Communication Based on Public Switched Telephone Network;
基于公共交换电话网络可视通信建立的研究
Study on the Organizing Pattern of the Cross-region Coal Communication Network;
跨地区煤炭专用电话交换网组网模式的研究
Customers still need a contract with a service provider to obtain access to the network and then to the public switched-telephone network.
使用者仍然得和业者签订合约才能使用网路和公众交换式电话网路。
Integrated Services Digital Network(ISDN) is easy to access Public Switched Telephone Network(PSTN) and has larger transmission and capacity and higher reliability.
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。
Appling CORBA Technic to Local PSTN Management;
CORBA技术在本地电话交换网管系统中的应用
private automatic telephone exchange
专用自动电话交换机
railway telephone exchange
铁路专用电话交换机