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Transition's AC powered PoE media converters combine data received over a fiber optic link with -48VDC power; providing power to Data Terminal Equipment (DTE) Power Devices (PD) over unshielded twisted pair cable. The PoE converters are Power Sourcing Equipment (PSE) and are fully compatible with Powered Devices (PD) that comply with the EEE802.3af: 2003 standard. The converters also include a PD signature sensing and power monitoring features per the IEEE 802.3af standard. Other features include Over-Current Protection, Under-Current Detection and Fault Protection Input. This product can operate in two modes: IEEE 802.3af mode as well as "legacy mode". In the IEEE 802.3af mode the POE is fully compatible with devices that comply with the IEEE802.3af standard. The POE converter is also capable of inserting power on either the spare pairs or data pairs of the MDI.
In the "legacy mode" POE can be configured for reverse polarity, 12 VDC, 24 VDC, or 48 VDC power insertion; as well as for other non-IEEE802.3af compatible PDs.