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1·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。

2·And that, teledata transfer are realized through Lines of Communication which is build-up by MODEM and Public Switched Telephone Network.

系统还利用由MODEM和公用电话交换网组成的通讯线路进行远程数据传输。

3·So far, facsimile is mostly carried on PSTN (Public Switched Telephone Network), which brings numerous expenses together with the service.

目前传真业务主要在公共电话网上承载，这种传真业务的使用给企业带来了巨额的支出。

4·The call forwarding sample demonstrates the call forwarding feature typically seen in public switched telephone networks, but it USES a SIP network.

Call Forwarding示例显示了访问转寄的特性，该特性一般见于公共交换电话网络，但是它使用了一个SIP网络。

5·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。

6·The intelligent combination of advanced technology and the public switched telephone network PSTN offers greater possibilities of optimization and promotion of home.

先进的科技和公用电话交换网pstn的结合为智能化家居的优化和推广提供了更大的可能性。

7·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。

8·Each base station is associated with a mobile switching center (MSC) that connects calls to and from the base to mobiles in other cells and the public switched telephone network.

每个基站都要跟“挪动交换核心”接洽，而MSC的作用是交往于基站的号召跟其余蜂窝的挪动用户、公共交换电话网连接起来。

9·The limited transmission rate available on the Public switched telephone network (PSTN) and on wireless networks presents a significant challenge to digital video communications.

这些应用对传输速率有限的公共交换电话网(PSTN网)和无线网络提出了重大挑战。

10·Between the center and the devices, the duplex communication links are created through the public switched telephone network, thus the remote management for the devices is realized.

集中管理中心与集中管理式电话计费器之间可通过公众电话网以拨号方式建立双向通信链路，从而实现对集中管理式电话计费器的远程管理。