IBM H SERIES RS/6000 - Manual (Page 244)

Serial Port Configuration
To configure the serial port on an AIX system, enter the following commands from an
AIX console:
1. Log in as root .
2. To find if you have any serial ports already configured, enter:
lsdev -Cc tty
If no serial ports are configured, none are listed. If you wish to configure serial
ports that are not listed, continue with the remaining steps.
3. Identify the serial port(s) with the modem(s).
4. Enter
smit tty
5. Select add tty
6. Select RS232
7. Select Baud rate 96 or higher.
8. Select login enable and set the flow control to RTS.
9. Commit the selections and set up any other needed serial ports.
10. Exit SMIT.
B-4 RS/6000 Enterprise Server Model H Series User's Guide