10/100Base-Tx Pin Assignments - Enterasys RoamAbout RBT-4102 Installation Manual

Cables and Pinouts

10/100BASE-TX Pin Assignments

Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45
connections: 100-ohm Category 3 or better cable for 10 Mbps connections. Also be sure
that the length of any twisted-pair connection does not exceed 100 meters (328 feet).
The RJ-45 port on the access point supports automatic MDI/MDI-X operation, so you can
use straight-through or crossover cables for all network connections to PCs, switches, or
hubs. In straight-through cable, pins 1, 2, 3, and 6, at one end of the cable, are connected
straight through to pins 1, 2, 3, and 6 at the other end of the cable.
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.
B-2
MDI Signal Name
)
port
)
port
)
port
)
port
)
port
)
port
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
-48V feeding power (Negative V
-48V feeding power (Negative V
Receive Data minus (RD-)
and GND (Positive V
) GND (Positive V
port
) GND (Positive V
port
)
port
)
port
)
port
)
port
)
port
)
port
port
port