- 15 -
DB-9 Pin Assignments
Troubleshooting
Pin
RS-232
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
Problem
Possible Cause
Action
Cannot
install serial
device.
Advanced settings
need to be
configured.
Contact ATEN Technical
Support for advice about
your specific serial device.