power over ethernet: easier then it seems
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Power Over Ethernet: . , CIS Events Group 30% Ethernet. ?Passive PoE / Solar PoE , .
Ethernet- ?Cisco, 2000-
, ; ; , , Ethernet-; ; , ;
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( 1-2-3-6, " ") B( 4-5-7-8, 10/100Base-T)
IEEE 802.3af-2003 400 48 (36-57) 15 ( ) 0 3-. 1-. 3 5. 2- 4-
IEEE 802.3at-2009 (PoE+ PoE plus) 25 ( ) 4-. 5- . 2- 4- , 50 .
(power sourcing equipment, . PSE) , Endspan Midspan
( , powered device, PD)
4 PD
PD - 2 PSE 2,8 10 B .
PSE ( 14,5 20,5 ) .PSE , PD .
48 , 400 400 5 , PSE ;PSE . 400 75 , PSE . ( ), PSE .
Passive PoE .. .
Solar PoE
- 4,5 100 IEEE 802.3az Energy-Efficient Ethernet (EEE) .Marvell EEPoE
Fluke Networks LinkRunner Pro PoE? ?
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