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Relying on a series of compact optical subsystem OSP platforms launched by Accelink according to the characteristics of subsystem products, the forms of OLP products include 1RU height OSP1200, 2RU height OSP2200 and 5RU height OSP5200. The whole series of products are of plug-in design, which supports the access of the whole OSP series platform function cards and hot swap. The products adopt the advanced optical switch technology and EDFA optical amplification technology, which can provide the protection of primary/secondary route switching for full rate services of single-wave and multi-wave systems, greatly improving system reliability.