Epson 10020 - Manual (Page 141)

To verify or change the primary serial port parameters,
highlight Primary serial port and press Enter. To
change the secondary serial port parameters, highlight
Secondary serial port and press Enter. Foreither
option, you see a menu similar to this:
Baud rate 1200 bps
Parity None
Data length 7 bits
Stop bits 1 bit(s)
*** SAVE SETTINGS ***
The procedure for changing the default settings is identical
for the primary and secondary serial ports. Just follow the
instructions below to set the parameters as needed. (See the
manual for your serial device to determine which parameter
settings it requires.)
When you finish changing the settings, highlight
*** SAVE SETTINGS *** and press Enter to return to
the Setup menu.
Baud rate
To set the speed of communication, highlight Baud rate
and press Enter. The screen displays the following options:
110 bps
150 bps
300 bps
600 bps
1200 bps
2400 bps
4800 bps
9600 bps
19200 bps
38400 bps
Changing DIP Switches ad Using Setup A-11