| 摘要 |
A data transmission/reception apparatus including a network layer device section for performing a process corresponding to a physical layer of an OSI reference model is provided. The apparatus includes a maintenance management data insertion/extraction section for inserting maintenance management data into data to be transmitted, transmitting the data to be transmitted, and extracting the maintenance management data from received data, wherein the maintenance management data insertion/extraction section performs the insertion and extraction of the maintenance management data with respect to the network layer device section.
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