This rack is used to centrally power multiple optical fiber transceivers, thus reducing the connection line and simplifying the structure. It has the remarkable advantages of stable working, adapting to the large power supply voltage range, large power supply capacity, convenient operation, easy management and easy maintenance, etc. It is suitable for working environments that require high reliability, high capacity, high integration and high performance. This rack supports hot plugging. It can be powered by single power supply or dual power supply.Voltage AC220V or DC48V is optional. When maintaining and replacing the rack power supply, there is no need to unplug the optical fiber transceiver or remove the rack from the cabinet. The maintenance is extremely convenient and fast, and can provide high-reliability, efficient, easy to operate, easy to maintain, economical and practical optical fiber network center solutions for optical fiber network systems.