软交换是下一代网络的核心设备之一，也是目前电路交换网向分组交换网演进的设备之一。
Soft exchange is one of the core equipment of the next-generation network and also one of the equipment of evolving from circuit exchange network to packet exchange network.
随着向下一代网络的演进，电信网络会逐渐过渡到基于IP 的分组核心网络。
With the coming of NGN, the telecom network will come into the era of packets network based on IP.
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