SICOM3004/SICOM3006 User’s Manual 201105
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Appendix A: Twisted-pair and Pin Distribution
For the connection of 10Base‐T/100Base‐TX, the twisted‐pair must have two pair cable. Each
pair is distinguished with two different colors. For example, one strand is green, and the other is
the alternate of green and white stripes. RJ‐45 connector should be equipped at both ends of the
cable.
Warning:
Don’t insert a telephone plug into any RJ‐45 port. Only use twisted‐pair with RJ45 connectors at
both ends conforming to FCC standard.
Fig. A‐1 Shows how the connector of RJ‐45 is numbered please make sure that the inserting
direction is correct.
1
8
8
1
Figure A‐1 Connector of RJ‐45
Pin
distribution
of
10Base
T/100Base
TX
Unshielded twisted‐ pair (UTP) or shielded twisted‐pair (STP) will be used for the connection of
RJ‐45: for the connection of 10Mbps, category 3, 4 and 5 of 100 ohm will be used, and cat.5 of
100 ohm will be used for 100Mbps. Additionally, do make sure that the connecting length of any
twisted‐pair shall not exceed 100 meter.
Port of RJ‐45 supports automatic MDI/MDI‐X operation, PC or server may be connected by
straight‐through cable, or connect with other switch or hub. In straight‐through cable, pin 1, 2, 3
and 6 at one end of the cable are connected to pin 1, 2, 3 and 6 at the other end of the
