STANDARD |
SOURCE |
LOAD |
REMARKS |
|
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, protected |
RX, DC+ |
RX, DC+ |
TX, DC- |
spare |
spare |
TX, DC- |
spare |
spare |
(embedded) |
Industry Standard for active PoE |
IEEE 802.3af
using spare pairs |
48 V DC, protected |
RX |
RX |
TX |
DC+ |
DC+ |
TX |
DC- |
DC- |
(embedded) |
Industry Standard for passive PoE |
Intel, Symbol, Orinoco |
Usually
12 or 24 V DC |
RX |
RX |
TX |
DC+ |
DC+ |
TX |
DC- |
DC- |
(embedded) |
Most Brands of PoE |
Cisco
(OLD old standard) |
48 V DC |
RX |
RX |
TX |
DC- |
DC- |
TX |
DC+ |
DC+ |
(embedded) |
Older Cisco polarity is
REVERSED |
Cisco
(NEW old standard) |
48 V DC |
RX |
RX |
TX |
DC+ |
DC+ |
TX |
DC- |
DC- |
(embedded) |
New Cisco is IEEE compliant |
Cisco (very unusual) |
28 V DC |
DC+ |
DC- |
TX |
n.c. |
n.c. |
TX |
RX |
RX |
(embedded) |
Seen on Cisco 7936 conference station, also worked with Polycom SoundStation IP 4000 with 19V source power |
D-Link (Adapter) |
48 V DC |
RX |
RX |
TX |
DC+ |
DC+ |
TX |
DC- |
DC- |
5VDC @ 2.5A
or 12VDC @ 1A |
DC coaxial
5.5/2.5mm |
D-Link PoE Adapter for non-PoE products. |
Apple MacIntosh AirPort PoE, Extreme |
48 V DC |
RX |
RX |
TX |
DC? |
DC?? |
TX |
DC?? |
DC?? |
Converted to ??? |
DC coaxial
(???) |
Mac Polarity Unknown |
HyperLink |
Many DC Voltages Available |
RX |
RX |
TX |
DC+ |
DC+ |
TX |
DC- |
DC- |
same as input |
DC coaxial and others available |
Variety of Options Available to Fit Most Brands of PoE |
NYC Wireless
Roll Your Own |
12 or 24 or 48 V DC |
RX |
RX |
TX |
DC+ |
DC+ |
TX |
DC- |
DC- |
same as input |
DC coaxial
or as reqd |
New York City Wireless PoE |
3Com AirConnect |
24 V DC |
RX |
RX |
TX |
spare |
spare |
TX |
DC+ |
DC- |
|
|
3Com AirConnect wireless access points |
Alvarion VL |
55 Vdc |
RX |
RX |
TX |
DC+ |
DC- |
TX |
DC+ |
DC- |
|
|
|
TP-link TL-SF1008P |
|
DC- |
DC- |
DC+ |
|
|
|
|
DC+ |
|
|
|
Polycom IP500 / 501 |
12V DC |
RX |
RX |
TX |
DC- |
DC- |
TX |
DC+ |
DC+ |
|
|
The only difference between regular PoE injectors and the Polycom one is the inverted polarity. |