MAN must possess large capacity, high-bandwidth, multi-service and high reliability to achieve broadband IP service suppont capabilites on backbone layer.
城域网必须具备大容量、高带宽、多业务、高可靠性等能力，从而实现骨干层层面的宽带IP化业务支持能力。
However, the network model and corresponding technology strategy of MAN IP broadband access network present variety variously due to different operation characteristics.
可是IP城域网宽带接入网络的建设模式和相应的技术策略因为业务的特点不同，呈现出很多的变化。
However, the network model and corresponding technology strategy of MAN IP broadband access network present variety variously due to different operation characteristics.
可是IP城域网宽带接入网络的建设模式和相应的技术策略因为业务的特点不同，呈现出很多的变化。
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