公共交换电话网是成熟的网络之一。
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。
The limited transmission rate available on the Public switched telephone network (PSTN) and on wireless networks presents a significant challenge to digital video communications.
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。
To be successful, Internet faxing must provide reliability and performance equal to or better than traditional public switched telephone network faxing.
实验证明，此方法可取得较好的容错性能，可应用于公共交换电话网(PSTN)和无线信道上的视频传输。
It has been found that this method can obtain better error resilient performance and can be applied in video transmission over Public Switch Telephone Network (PSTN) and wireless channel.
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。
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.
介绍了一种基于公共交换电话网（PSTN）的远程视频监控系统，它能通过PSTN实时传送现场的图像、声音及各种监控参数。
This paper presents a remote video monitoring system based on PSTN, it can carry real-time video, audio and all kinds of monitoring parameters.
从市场情况来看，电信业的竞争正在加剧，PSTN（公共交换电话网络）、CATV（有线电视网）、ATM和IP（数据网）都在相互窥视对方的传统市场。
According to the circumstances of the market, the competition of the telecom vocation is intensifying, the operators of PSTN, CATV, ATM and IP networks are peeking at others traditional markets.
从市场情况来看，电信业的竞争正在加剧，PSTN（公共交换电话网络）、CATV（有线电视网）、ATM和IP（数据网）都在相互窥视对方的传统市场。
According to the circumstances of the market, the competition of the telecom vocation is intensifying, the operators of PSTN, CATV, ATM and IP networks are peeking at others traditional markets.
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