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当前城域光网络的现状是,SDH/MSTP(DWDM)光网络已经成为城域网、汇聚层光传输网建设的主流,作为技术上的自然延伸,接入网采用SDH/MSTP应是理想,但实际上情况并非如此。由于市场竞争日趋激烈,运营商投资理性不断增强。在接入层,由于设备数量众多,设备价格越显重要,传统的P D H设
At present, the metro optical network status of the metropolitan area is that the optical network of the SDH / MSTP (DWDM) has become the mainstream of metro network and convergence optical network construction. As a natural extension of technology, the SDH / MSTP should be ideal for the access network, But in fact this is not the case. Due to the increasingly fierce market competition, operators invest more and more rationally. In the access layer, due to the large number of devices, the more important the price of equipment, the traditional P D H