JFOPP-FSP30-A-001 is fiber storage unit of the 3U 19 inch rack mounted ODF. The internal structure of the ODF includes a specialized fiber winding column, can coil the excess fiber in the cabinet wiring inside the ODF, making cable management simple and convenient. The ODF front end is equipped with a snap-on cover, providing additional protection and making the inside of the cabinet look tidy and presentable, eliminating the problem of uneven fiber lengths.