Although Hepatitis E often causes an acute and self-limiting infection (the virus usually resolves itself and the individual recovers) with low mortality rates in the western world, it bears a high risk of developing chronic hepatitis in immunocompromised patients with substantial mortality rates.
IEEE 802.3 PoE Plus - March 2005 Telephony Products PoE Power Requirements A fully loaded 24 port 802.3af installation requires approximately 370 watts. If PoE Plus max power is 30 watts per port, then a fully loaded 24 port installation would require approximately 720 watts. This requires a substantial UPS.
POE treats each pair as a single conductor, and can use either the two data pairs or the two spare pairs to carry electrical current. Power over Ethernet is injected onto the cable at a voltage between 44 and 57 volts DC, and typically 48 volts is used. This relatively high voltage allows efficient power transfer along the cable, while still being low enough to be regarded as safe.