User`s guide

1. Insert the 25-pin male printer end of the cable into the printer’s
serial port (fig. 3.4); then tighten the screws on the cable to
attach it to the printer.
2. Plug the other end of the cable into the host’s serial port. On
some hosts, the 25-pin parallel port and the 25-pin serial port
may look similar, but the parallel port is female and the serial
port is male.
The following sections, “Testing Serial Communication” and
“Changing Serial Port Settings,” explain how to establish serial
communication between the printer and the host.
Host
Printer
25-Pin Female Port
9-Pin Male Port
Fig. 3.4 Host and Printer Serial Interface Ports
Chapter 3
Printer-Host Interface 3-15