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APPENDIX A
A.1 Switch‘s RJ-45 Pin Assignments
1000Mbps, 1000Base T
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1 BI_DA+ BI_DB+
2 BI_DA- BI_DB-
3 BI_DB+ BI_DA+
4 BI_DC+ BI_DD+
5 BI_DC- BI_DD-
6 BI_DB- BI_DA-
7 BI_DD+ BI_DC+
8 BI_DD- BI_DC-
Implicit implementation of the crossover function within a twisted-pair cable, or at a wiring panel, while not expressly
forbidden, is beyond the scope of this standard.
A.2 10/100Mbps, 10/100Base-TX
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1 1 3
2 2 6
3 3 1
6 6 2
A.3 RJ-45 cable pin assignment
2 1 3 6
1
2
3
6
2 1
3 6
There are 8 wires on a standard UTP/STP cable and each wire is color-coded. The following shows the pin allocation and
color of straight cable and crossover cable connection: