Power Over Ethernet (PoE) Basics
PoE (originally called Power Over LAN ) was first proposed in late 1990''s by PowerDsine from Petah Tikva and 3Com from Palo Alto. The various implementations of the system were described in a number of patents (such as US 5,994,998, US 6,473,608 B1, US 7,046,983 B2, EP 1 764 947 A2, and US 6,329,906 B1).
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