Further more, the paper puts forward cost structure models of SDH ring and WDM ring and calculates the two rings'costs with varying ring size and traffic volume.
提出了SDH环和WDM环的成本构成模型，计算分析了在不同的环节点数量和不同的业务流量情况下二者的成本。
Further more, the paper puts forward cost structure models of SDH ring and WDM ring and calculates the two rings'costs with varying ring size and traffic volume.
提出了SDH环和WDM环的成本构成模型，计算分析了在不同的环节点数量和不同的业务流量情况下二者的成本。
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