Straight-Through Wiring - Enterasys RoamAbout RBT-4102 Installation Manual

Cables and Pinouts
Pin
1 Receive Data plus (RD+)
and GND (Positive V
2 Receive Data minus (RD-)
and GND (Positive V
Transmit Data minus (TD+)
3
and -48V feeding power (Negative V
GND (Positive V
4
GND (Positive V
5
Transmit Data minus (TD-)
6
and -48V feeding power (Negative V
-48V feeding power (Negative V
7
-48V feeding power (Negative V
8
Note: The "+" and "-" signs represent the polarity of the wires that make up each wire pair.

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.
End A
B-2
MDI Signal Name
)
port
)
port
)
port
)
port
port
port
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-through Cable
White/Orange Stripe
Orange
White/Green Stripe
1
2
Blue
3
4
White/Blue Stripe
5
6
Green
7
8
White/Brown Stripe
Brown
MDI-X Signal Name
Transmit Data plus (TD+)
and -48V feeding power (Negative V
Transmit Data minus (TD-)
and -48V feeding power (Negative V
Receive Data plus (RD+)
) and GND (Positive V
port
-48V feeding power (Negative V
-48V feeding power (Negative V
Receive Data minus (RD-)
) and GND (Positive V
port
) GND (Positive V
port
) GND (Positive V
port
)
port
)
port
)
port
)
port
)
port
)
port
1
2
End B
3
4
5
6
7
8