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Appendix A. Cable Pinout Diagrams
A-3
Crossover 10BASE-T/100BASE-TX Cables for STP
Figure A-6. Crossover STP Cable (RJ-45 to IBM Data Connector)
Null-Modem Cable
A null-modem cable should be used for a direct connection from a PC serial port to
the 8237 Management Port.
Hub’s 9-Pin
Management Port
PC’s 9-Pin
COM Port
1 DCD
1 DCD
2 RXD
2 RXD
3 TXD
3 TXD
4 DTR
4 DTR
5 SGND
5 SGND
6 DSR
6 DSR
7 RTS
7 RTS
8 CTS
8 CTS
9 RI
9 RI
Figure A-7. Null-Modem Cable Connection
Summary of Contents for 8237
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