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100BASE-TX/10BASE-T Pin Assignments
With 100BASE-TX/10BASE-T cable, pins 1 and 2 are used for
transmitting data, and pins 3 and 6 for receiving data.
Pin Number
1
2
3
6
1: The "+" and "-" signs represent the polarity of the
wires that make up each wire pair.
Because all ports on this switch support automatic MDI/MDI-X
operation, you can use straight-through cables for all network connections
to PCs or servers, or to other 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. The table below shows
the 10BASE-T/100BASE-TX MDI and MDI-X port pinouts.
Pin
1
2
3
6
No other pins are used.
Note: If auto-negotiation is disabled for an RJ-45 port, the auto-MDI/
MDI-X pin signal configuration is also disabled.
T
RJ-45 Pin Assignments
Assignment
Tx+
Tx-
Rx+
Rx-
MDI-X Signal Name
Receive Data plus (RD+)
Receive Data minus (RD-)
Transmit Data plus (TD+)
Transmit Data minus (TD-)
-P
C
WISTED
AIR
ABLE AND
1
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Receive Data plus (RD+)
Receive Data minus (RD-)
P
A
IN
SSIGNMENTS
MDI Signal Name
B-3
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