Installation guide

Cables and Pinouts
B-2
Straight-Through Wiring
If the twisted-pair cable is to join two ports and only one of the ports has an internal
crossover (MDI-X), the two pairs of wires must be straight-through.
Pin MDI Signal Name MDI-X Signal Name
1 Receive Data plus (RD+)
and GND (Positive V
port
)
Transmit Data plus (TD+)
and -48V feeding power (Negative V
port
)
2 Receive Data minus (RD-)
and GND (Positive V
port
)
Transmit Data minus (TD-)
and -48V feeding power (Negative V
port
)
3
Transmit Data minus (TD+)
and -48V feeding power (Negative V
port
)
Receive Data plus (RD+)
and GND (Positive V
port
)
4
GND (Positive V
port
) -48V feeding power (Negative V
port
)
5
GND (Positive V
port
) -48V feeding power (Negative V
port
)
6
Transmit Data minus (TD-)
and -48V feeding power (Negative V
port
)
Receive Data minus (RD-)
and GND (Positive V
port
)
7
-48V feeding power (Negative V
port
) GND (Positive V
port
8
-48V feeding power (Negative V
port
) GND (Positive V
port
Note: The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
White/Orange Stripe
Orange
White/Green Stripe
Green
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-through Cable
End A
End B
Blue
White/Blue Stripe
Brown
White/Brown Stripe