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

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

connectors

Tab le 6 Pin assignments

Pin Number Signal Function
Ports configured as MDI
1TxData + Transmit data
2TxData – Transmit data
3RxData + Receive Data
4Not assigned
5Not assigned
6RxData – Receive data
7Not assigned
8Not assigned
Ports configured as MDIX
1RxData + Receive Data
2RxData – Receive Data
3TxData + Transmit data
4Not assigned
5Not assigned
6TxData – Transmit data
7Not assigned
8Not assigned
16954ua.book Page 34 Friday, April 30, 1999 9:39 AM