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But also needed is interoperability with the existing voice and video infrastructures: public switched networks, PBSs and video conferencing systems. 但也需要与现有话音和视频基础设施（公共交换网、用户交换机和视频会议系统）的互操作性。
But also needed is interoperability with the existing voice and video infrastructures: public switched networks,PBSs and video conferencing systems. 但也需要与现有话音和视频基础设施（公共交换网、用户交换机和视频会议系统）的互操作性。
public switched network (PSN) 公用交换网络
A term applied to a data transmission carried on the public switched telephone network and initiated by dialing the telephone number of the receiving station. 应用于普通开关电话网数据传输上的术语，指拨通某接收站的电话号码就能访问该系统的性质和动作。
A telecommunication line that links a private telecommunication system to the public switched network 把专用通信系统连接到公用交换网上的一种远程通信[电信]线路。
public switched network 公用交换网
A licence that must be obtained by any organization seeking to link a private network to the British PSTN (Public Switched Telephone Network). 需要将私人网络接入英国PSTN（公共电话交换系统）的任何组织必须首先取得许可证。
The number of lines and traffic of the Public Switched Telephone Network (PSTN) network have also been decreasing. 公共电话交换网(PSTN)的线路和流量也在减少。
To be successful,Internet faxing must provide reliability and performance equal to or better than traditional public switched telephone network faxing. 为了获得成功，因特网传真必须提供与传统的公共交换电话网传真相同、甚至更好的可靠性和性能。
In data communication, the connection through the public switched telephone network from a terminal to a service, network or computer. 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 the public switched telephone network (PSTN) age, people only could use the SMS and dial a telephone to communication. 其不只因为有著较传统电话更低的成本，同时也由于其能整合众多的网路服务。
Universal switch network and signal modulate circuit are designed. 设计了通用的通道开关网络和信号调理电路。
Which of the following is a rule for configuring a switched network? 下列哪一个是配置交换?
This Recommendation describes a high-speed terminal access to videotex services for use on the Public Switched Telephone Network (PSTN). 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。
If it connects,the sending machine scans the document and transmits the image over the public switched telephone network (PSTN) to the receiving machine. 如果接通了，发送机就对文件扫描，然后通过公共交换电话网（PSTN）向接收机传送文件图像。
A term applied to a data transmission carried on the public switched telephone network and initiated by dialing the telephone number of the receivingstation. 应用于普通开关电话网数据传输上的术语,指拨通某接收站的电话号码就能访问该系统的性质和动作。
If it connects, the sending machine scans the document and transmits the image over the public switched telephone network (PSTN) to the receiving machine. 如果接通了，发送机就对文件扫描，然后通过公共交换电话网（pstn）向接收机传送文件图像。
Time is required for protocol information to propagate throughout a switched network. 协定资讯在通过一个交换网路时是需要时间的。
Traditional telephony uses a copper cable, called the local loop, to connect the telephone handset in the subscriber premises to the public switched telephone network (PSTN). 传统的电话机使用铜轴电缆，被称为本地迴路，以连结用户住宅电话听筒到公众交换电话网路(PSTN)。
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。