User`s guide

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Bidirectional The bidirectional parallel interface allows your host computer to
communicate to the printer and the printer to communicate back
to the computer if the host is using software that supports
bidirectional protocol. If your computer does not have a
bidirectional parallel port, you should set the bidirectional mode
to off. With bidirectional mode off, communication is only from
the computer to the printer.
Serial Interface
(optional)
Serial communication sends data one bit at a time and can
communicate over longer distances than parallel.
This group contains all of the selectable menu items pertaining
to the serial interface. These are: Enable Interface, Printer Type,
Flow Control, Baud Rate, Data Bits, Parity, Stop Bits, and DTR
Polarity.
The serial interface may be enabled or disabled, setup for a
specific emulation, and the interface parameters may be changed
to match the settings on your host computer.
Enable Interface The interface is enabled (*On) when your printer has a serial
board installed. If you change this setting to Off, the interface is
disabled.
Printer Type
It is not necessary to specify which printer language is used with
the serial interface because each interface is initially set up to
automatically recognize and interpret the printer language being
sent. You may, however, set up the serial interface to only
recognize a specific printer language. Refer to "Printer Type" in
the Parallel Interface section for definitions of the available
printer languages.
Using the Control Panel 2-21