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WISTED
-P
AIR
C
AB LE
AND
P
IN
A
SSIGNMENTS
February 2003 © 2003 Foundry Networks, Inc. B-3
network connections to PCs or servers, or to other switches or
hubs. The RJ-45 port on the 100BASE-TX module is an MDI-X
port, which allows you to use straight-through cable for
connections to PCs and servers. 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. For connection
to hubs or switches which have MDI-X ports, a crossover cable
must be used.
Pin MDI-X Signal
Name
MDI Signal
Name
1 Receive Data plus
(RD+)
Transmit Data
plus (TD+)
2 Receive Data minus
(RD-)
Transmit Data
minus (TD-)
3
Transmit Data plus
(TD+)
Receive Data plus
(RD+)
6
Transmit Data
minus (TD-)
Receive Data
minus (RD-)
4,5,7,8
Not used Not used
Note: The “+” and “-” signs represent the polarity
of the wires that make up each wire pair.