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Translate 10-/100-Mbps copper media to 100-Mbps fiber optic connections. Connect to PoE switches, mid-span hubs, or other 802.3af power source equipment (PSE). Work as powered devices (PD) that receive their power from the spare pairs of copper data cable. Link fault passthrough enhances the integrity of the copper and fiber links. Far-end fault detection keeps data from being sent over an invalid link.