Using The Serial Interface - Epson 3865X Plus User Manual

Using the Serial Interface

If you have a printer, a modem, or other peripheral with a serial
interface, you can connect it to the serial (RS-232C) port on
the back of the computer.
The serial port uses a DB-9P connector, so be sure you have a
compatible cable. To connect a serial device, follow the same
steps as above for connecting a parallel device but insert the
connector into the serial port, marked with a special icon, as
shown below.
Note
You need to ensure that the serial port is set up so it
functions properly. If you are using the port for a serial
printer, you need to redirect printer output to the serial port
instead of the parallel port. To do this, you can use the
MS-DOS MODE or SETMODE command or the MENU
program. See your MS-DOS Reference Manual for
instructions.
Setting Up Your System 1-11