74 APPENDIX B: PIN-OUTS
Modem Cable 9-pin to RS-232 25-pin
RJ-45 Pin Assignments

Pin assignments are identical for 10BASE-TX and 100BASE-T RJ-45

connectors.

Table10 Pin assignments

Pin Number Signal Function
Ports configured as MDI
1Transmit Data + Bidirectional Data A+
2Transmit Data + Bidirectional Data A-
3Receive Data + Bidirectional Data B+
4Not assigned Bidirectional Data C+
5Not assigned Bidirectional Data C-
6Receive Data – Bidirectional Data B-
7Not assigned Bidirectional Data D+
8Not assigned Bidirectional Data D-
DUA1720-3AAA07.book Page 74 Wednesday, March 17, 2004 1:14 PM