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IEEE PoE (Power over MDI) is the only standard for running power over a network cable, consisting of the original PoE 802.3af (12.95 W), the improved "PoE+" 802.3at (25.5 W) and the latest "4PPoE" 802.3bt (71 W). There is a large number of proprietary variants out there as well. Most of them are not interoperable and it's possible to damage the hardware ...


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