SICOM3004/SICOM3006 User’s Manual 201105
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straight‐through cable respectively. Cross‐over cable must be used for switch or hub with MDI‐X
port. The pin distribution of 10Base‐T/100Base‐TX is listed in the table A‐1.
Table A‐1 Pin distribution of 10Base‐T/100Base‐TX
Pin
MDI‐X signal name
MDI signal name
1
Receiving data
＋（
RD+
）
Output data
＋（
TD+
）
2
Receiving data
－（
RD‐
）
Output data
－（
TD‐
）
3
Output data
＋（
TD+
）
Receiving data
＋（
RD+
）
6
Output data
－（
TD‐
）
Receiving data
－（
RD‐
）
4
，
5
，
7
，
8
Unused
Unused
Note: “+”“‐”denoting cable polarity.
Definition
of
straight
through
cable
from
RJ45
(8
pin)
to
RJ45
(8
pin)
Figure A‐2 Cable sequence of straight‐through cable
Definition
of
Cross
over
cable
from
RJ45
(8
pin)
to
RJ45
(8
pin)
Figure A‐3 Cable sequence of cross‐over cable
