这就意味着目前存在的面向连接的和电路交换的网络必须升级，以便能够支持分组交换的数据业务。
This means that many of the existing connection-oriented or circuit-switched networks will need to be upgraded to support packet-switched data traffic.
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.
光突发交换(OBS)是兼顾光电路交换和光分组交换优点的一种折衷方案，是未来光互联网的一种实现形式。
Optical burst switching (OBS) is a compromising method combining the advantages of optical circuit switching and optical packet switching and is a promising optical internetworking form in the future.
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