Power Over Ethernet standards

Property802.3af (802.3at Type 1)
"PoE"
802.3at Type 2
"PoE+"
802.3bt Type 3
"4PPoE"
802.3bt Type 4
Max Power delivered by PSE15.40 W30.0 W60 W100 W
44.0 - 57.0 V50.0 - 57.0 V50.0 - 57.0 V52.0 - 57.0 V
Power available at PD12.95 W25.50 W51 W71 W
37.0 - 57.0 V42.5 - 57.0 V42.5 - 57.0 V41.1 - 57.0 V
Max current350 mA600 mA600 mA/pair960 mA/pair
Max resistance per pair20 Ω12.5 Ω12.5 Ω12.5 Ω
Power management3 levels negotiated by signature4 levels negotiated by signature3 levels negotiated by signature
0.1 W steps negotiated by LLDP
Supported cablesCat 3
Cat 5
Cat 5Cat 5Cat 5
Supported modesMode A, Mode BMode A, Mode BMode A, Mode B, 4-pair mode4-pair mode


802.3af A/B Standards


PinT568AT568B10/100 mode B10/100 mode A1000 mode B1000 mode A
1
white/green

white/orange
Rx +Rx +DC +TxRx A +TxRx A +DC +
2
green

orange
Rx -Rx -DC +TxRx A -TxRx A -DC +
3
white/orange

white/green
Tx +Tx +DC -TxRx B +TxRx B +DC -
4
blue

blue
DC +TxRx C +DC +TxRx C +
5
white/blue

white/blue
DC +TxRx C -DC +TxRx C -
6
orange

green
Tx -Tx -DC -TxRx B -TxRx B -DC -
7
white/brown

white/brown
DC -TxRx D +DC -TxRx D +
8
brown

brown
DC -TxRx D -DC -TxRx D -
Pinout from the power sourcing equipment perspective.