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1 System tour
18
Serial port B jumpers
The table identifies the function of each pin pair on the serial port B
jumper block (JP25). By default, the serial port B connector is an RJ-45,
which has only eight pins and doesn't provide separate DCD and DSR
signals. The serial port B jumpers let you configure the DSR and DCD
signals passed from the port connector to the inputs of the UART. The
default configuration has jumpers installed on pins 1 and 2 and on pins
3 and 4.
Caution!
Never install jumpers on pins 3 and 4 and on pins 5 and
6 at the same time. This would cause both the DCD and DSR
signals from the connector to drive the DCD input on the UART,
resulting in signal contention.
Jumper
block
Pin
Jumper name - effect when shorted
JP25
1-2
DSR to DSR - DSR from connector is passed to DSR
input on UART (RJ-45 & DB9).
3-4
DSR to DCD - DSR from connector is passed to DCD
input on UART (RJ-45 only).
5-6
DCD to DCD - DCD from connector is passed to DCD
input on UART (DB9 only).
7-8
Spare.
AA G900 ug - EN.book Page 18 Wednesday, September 25, 2002 5:23 PM
Содержание Altos G900
Страница 1: ...Acer Altos G900 User s guide ...
Страница 10: ...x ...
Страница 16: ...xvi ...
Страница 17: ...1 System tour ...
Страница 43: ...2 System setup ...
Страница 44: ...This chapter describes the system setup procedures both for hardware and software aspects ...
Страница 55: ...3 Hardware configuration ...
Страница 56: ...This chapter describes detailed procedures for system hardware setup ...
Страница 127: ...4 BIOS setup ...
Страница 158: ...4 BIOS setup 142 Boot The Boot menu displays a list of removable device s and hard disk s available in the system ...
Страница 160: ...4 BIOS setup 144 ...
Страница 161: ...Appendix A System rack installation ...
Страница 162: ...This appendix describes the procedures for configuring the system in a rack mount fashion ...
Страница 175: ...159 5 Slide the server into the rack Figure 70 Mounting the server to the rack ...
Страница 176: ...Appendix A System rack installation 160 ...
Страница 177: ...Appendix B System management ...
Страница 178: ...This appendix gives information about the software programs and utilities bundled with your system ...
Страница 210: ...Appendix B System management 194 ...
Страница 211: ...Appendix C Equipment log and configuration worksheets ...
Страница 217: ...201 ...
Страница 218: ...Appendix C Equipment log and configuration worksheets 202 ...
Страница 219: ...Appendix D Troubleshooting ...
Страница 220: ...This appendix helps you identify and solve problems that might occur while you are using the system ...
Страница 231: ...Appendix E Codes and error messages ...
Страница 232: ...This appendix includes tables of codes and error messages that may be encountered when operating the system ...