求翻译：即下一代网络，是电信发展史上的一个里程碑，它标志着新一代电信网络时代的到来。从发展的角度来看，NGN实现了传统的以电路交换为主的PSTN网络向以分组交换为主的IP电信网络的转变。它不仅继承了所有PSTN网络的业务，还能够把大量的数据传输卸载到IP网络中以减轻PSTN网络的负荷；又由于网络融合的新特性，增加了许多新型业务。从这个意义上讲，NGN使得在IP网络上发展语音、视频、数据等多媒体综合业务成为可能。是什么意思？

Next Generation Network, is a milestone in the history of telecommunication development, it marks the era of next-generation telecommunications network. From a development perspective, and ngn to achieve the transformation of the traditional circuit-switched pstn network ip telecommunications networ

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Namely the next generation network, is in an telecommunication history milestone, it symbolizes the new generation of telecommunication network time arrival.Looked from the development angle that, NGN realized the tradition to approach by the electric circuit exchange primarily PSTN network groups t

正在翻译，请等待...

正在翻译，请等待...