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Power other Ethernet (POE) pinout

network connector

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Power over Ethernet is a technology that allows IP telephones, wireless LAN Access Points, Security network cameras and other IP-based terminals to receive power, in parallel to data, over the existing CAT-5 Ethernet infrastructure without the need to make any modifications in it. Described by IEEE 802.3af standard.

8 pin RJ45 (8P8C) female connector layout

8 pin RJ45 (8P8C) female connector
at the hub



PoE integrates data and power on the same wires, it keeps the structured cabling safe and does not interfere with concurrent network operation. PoE delivers 48v of DC power over unshielded twisted-pair wiring for terminals consuming less than 13 watts of power.


IEEE 802.3af standard POE pinout:
Pin Alternative A Alternative B
1Vport Positive  
2Vport Positive  
3Vport Negative  
4 Vport Positive
5 Vport Positive
6Vport Negative  
7 Vport Negative
8 Vport Negative


POE pinouts from different manufacturers
STANDARDSOURCELOADREMARKS
 Ethernet RJ-45 connector pin number  
Source Voltage 1 2 3 4 5 6 7 8 Load Voltage DC Load Connector 
IEEE 802.3af
using data pairs 		48 V DC, protectedRX, DC+RX, DC+TX, DC-sparespareTX, DC-sparespare(embedded)Industry Standard for embedded PoE
IEEE 802.3af
using spare pairs		48 V DC, protectedRXRXTXDC+DC+TXDC-DC-(embedded)Industry Standard for embedded PoE
Intel, Symbol, OrinocoUsually
12 or 24 V DC		RXRXTXDC+DC+TXDC-DC-(embedded)Most Brands of PoE
Cisco
(OLD old standard)		48 V DCRXRXTXDC-DC-TXDC+DC+(embedded)Older Cisco polarity is
REVERSED
Cisco
(NEW old standard)		48 V DCRXRXTXDC+DC+TXDC-DC-(embedded)New Cisco is IEEE compliant
D-Link (Adapter)48 V DCRXRXTXDC??DC??TXDC??DC??5VDC @ 2.5ADC coaxial
5.5/2.5mm		D-Link PoE Adapter for non-PoE products.
Apple MacIntosh AirPort PoE, Extreme48 V DCRXRXTXDC??DC??TXDC??DC??Converted to ???DC coaxial
(???)		Mac Polarity Unknown
HyperLinkMany DC Voltages AvailableRXRXTXDC+DC+TXDC-DC-same as inputDC coaxial and others availableVariety of Options Available to Fit Most Brands of PoE
NYC Wireless
"Roll Your Own"		12 or 24 or 48 V DCRXRXTXDC+DC+TXDC-DC-same as inputDC coaxial
or as reqd		New York City Wireless PoE

PoE - powered devices should obey following specifications:

Parameter Min Max
Signature Resistance, KOhm 23.75 26.25
Startup Time (till I>10mA), ms  300
Power Consumption, W  12.95
Operating Input Voltage Range, V36 57
Must Turn on Voltage, V 44 
Must Turn off Voltage, V 30 V 
Input Current (@36Vdc), mA 10 350
Input Current, Peak, mA  400


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8 pin RJ45 (8P8C) male connector diagram

8 pin RJ45 (8P8C) male connector
at the cable

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Pinouts.ru > Network hardware interfaces pinouts listing >  Pinout of Power other Ethernet (POE) and layout of 8 pin RJ45 (8P8C) female connector and 8 pin RJ45 (8P8C) male connector
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Source(s) of this and additional information: "All You Need To Know About Power over Ethernet (PoE) and the IEEE 802.3af Standard" , altair.org 0 reports
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