3Com 3CR16708-91 Getting Started Guide - Page 70
RJ-45 Pin Assignments, Table 11
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70 APPENDIX B: PIN-OUTS RJ-45 Pin Assignments Pin assignments are identical for 10BASE-T and 100BASE-TX RJ-45 connectors. Table 11 Pin assignments Pin Number 10BASE-T/100BASE-TX Ports configured as MDI 1 Transmit Data + 2 Transmit Data - 3 Receive Data + 4 Not assigned 5 Not assigned 6 Receive Data - 7 Not assigned 8 Not assigned 1000BASE-T Bidirectional Data A+ Bidirectional Data ABidirectional Data B+ Bidirectional Data C+ Bidirectional Data CBidirectional Data BBidirectional Data D+ Bidirectional Data D- Table 12 Pin assignments Pin Number 10BASE-T/100BASE-TX Ports configured as MDIX 1 Receive Data + 2 Receive Data - 3 Transmit Data + 4 Not assigned 5 Not assigned 6 Transmit Data - 7 Not assigned 8 Not assigned 1000BASE-T Bidirectional Data B+ Bidirectional Data BBidirectional Data A+ Bidirectional Data D+ Bidirectional Data DBidirectional Data ABidirectional Data C+ Bidirectional Data C-