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2
Hardware Installation
Serial Ports
The system board is equipped with 3 onboard serial ports (COM 1,
COM 2 and COM 4). It is also equipped with a 9-pin connector for
connecting an external serial port (COM 3). The serial ports are RS-
232 asynchronous communication ports with 16C550A-compatible
UARTs that can be used with modems, serial printers, remote dis-
play terminals, and other serial devices.
To connect COM 3, please refer to the following description. The
serial port may be mounted on a card-edge bracket. Install the card-
edge bracket to an available slot at the rear of the system chassis
then insert the cable connector to the 9-pin connector. Make sure
the colored stripe on the ribbon cable is aligned with pin 1 of the
connector.
COM 3
W
COM 4
COM 2
COM 1
W
W
1
1
1
1
1
2
2
2
2
2
9
9
9
9
9
DCD-
TD
GND
RTS-
RI-
RD
DTR-
DSR-
CTS-