IP multimedia Subsystem (IMS) is a set of specifications that describes the Next Generation Networking (NGN) architecture for implementing IP based telephony and multimedia services.

IP多媒体子系统(IMS)是一组规范，描述用于实现基于IP的电话和多媒体服务的下一代网络(NGN)体系结构。

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Telecommunications network (NGN) relates to IP technology, multimedia technology, transfer technology and other fields.

电信网络(NGN)涉及到IP技术、多媒体技术、传输技术等多个领域。

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Nowadays both NGN network and 3g mobile communication network (will be in the construction) of Guizhou net communication Co. need to use IP VPN technology.

当前贵州网通的NGN网络及即将建设的3g移动通信网络都需要使用到IP VPN技术。

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