Epson EPL-6000 User Manual page 53

Connecting to Your Computer
Now that you have connected the serial interface cable and
checked the DIP switches, you need to set the printer for serial
communication in SelecType. You may also need to change several
interface settings, such as baud rate and parity, before your printer
and computer can communicate properly. See the SelecType section
in Chapter 3 for details on serial interface settings and for other
information on operating your printer.
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Testing and Connecting Your Printer