10base-t/100base-tx pin assignments – SMC Networks SMC9432BTX User Manual
Page 58
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B-4
C
ABLES
10BASE-T/100BASE-TX Pin Assignments
With 10BASE-T/100BASE-TX cable, pins 1 and 2 are used for
transmitting data, and pins 3 and 6 for receiving data. The “+” and
“-” signs in the tables below are used to represent the polarity of
the wires that make up each wire pair.
s
t
n
e
m
n
g
i
s
s
A
n
i
P
5
4
-
J
R
r
e
b
m
u
N
n
i
P
*
t
n
e
m
n
g
i
s
s
A
1
+
x
T
2
-
x
T
3
+
x
R
6
-
x
R
* The “+” and “-” signs are used to 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, the two pairs of wires must be
straight-through.
s
t
n
e
m
n
g
i
s
s
A
n
i
P
5
4
-
J
R
h
g
u
o
r
h
T
-
t
h
g
i
a
r
t
S
1
d
n
E
2
d
n
E
)
+
x
T
(
1
)
+
x
T
(
1
)
-
x
T
(
2
)
-
x
T
(
2
)
+
x
R
(
3
)
+
x
R
(
3
)
-
x
R
(
6
)
-
x
R
(
6
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