However the service-oriented optical network also needs the support of a plane, the emergence of service plane is driven by the service-oriented network.
而面向业务的光网络也需要一个平面的支持，业务平面的出现便是面向业务驱动下的产物。
Right now, optical network is changing from transport network to service network, and multi-service-oriented network becomes the trend of optical networks.
当前光网络正经历着由传送网向业务网的转变，多业务驱动光网络成为未来光网络的发展趋势。
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