As the architecture of next generation network, IMS has become a hotspots issue in the industry. In this paper, the evolution of PSTN network and the issue of IMS will be discussed.
IMS作为下一代网络的架构在业界已经讨论得非常火热，将探讨一下PSTN网络的演进和IMS问题。
As the architecture of next generation network, IMS has become a hotspots issue in the industry. In this paper, the evolution of PSTN network and the issue of IMS will be discussed.
IMS作为下一代网络的架构在业界已经讨论得非常火热，将探讨一下PSTN网络的演进和IMS问题。
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