NGN is uniform management platform of future network, which provides integrated broadband services such as voice, video and data. It is the amalgamative production of various technology and network.
NGN是未来网络的统一管理平台，提供包括音频、视频、数据在内的综合宽带业务，是各种技术融合与网络融合的产物。
With the rapid development of past years, the Internet has evolved into a large-scale integrated network with various data traffic such as Video, voice etc instead of homogenous data traffic.
随着互联网的飞速发展，互联网已逐步由单一的数据传送网演化为能够传输数据、语音、图像等实时多媒体信息的大规模综合传输网。
Definition of: ISDN (Integrated Services digital Network) an international standard for switched, digital dial-up telephone service for voice and data.
定义：ISDN(综合服务数字网络)，是一个国际转换标准，是为了语音和数据的数码拨号上网电话服务。
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