| 摘要 |
PROBLEM TO BE SOLVED: To reduce patch panel loss applied to the traffic of another receiver by taking the optical multiplexing and demultiplexing module (OADM) of a double ring two-way optical fiber transmission system out of an electronic cabinet and arranging the optical multiplexing and demultiplexing module at a place where an access possibility is low. SOLUTION: A WDM ring has an OADM that multiplexes and demultiplexes the signal of each node in the node. The WDM ring also has a power terminal device adjusting input - output data and performing conversion between a light area and an electricity area in each node. The OADM 501 of a node is arranged at a place that is physically separated from the power terminal device and connected to the power terminal device through an optical medium. In each node, traffic that is not to the node is subjected to routing through only one housing in the in-house of a subscriber requesting connection. In the case such a housing exists, the housing includes the OADM. |
