Epson EPL-N3000 Reference Manual page 114

If you select Tagged binary communications protocol, all data
except for special control characters is sent in binary (8-bit) format.
The binary format can be sent over parallel or serial
communications ports and are faster then sending data in the
ASCII format. The Pure binary data setting sends all data in pure
binary format, which is the fastest format to print in, but that can
be sent only over AppleTalk.
Send CTRL+D before job
Select this check box to specify for the CTRL+D character to be
sent at the beginning of every PostScript document. CTRL+D at
the beginning-of-file (BOF) will reset your printer to its default
settings to ensure that prior print jobs will not affect the current
print job. However, activating this setting may cause the print job
to fail if it is connected through a network instead of the parallel
or serial interface.
Send CTRL+D after job
Select this check box to specify for the CTRL+D character to be
sent at the end of every PostScript document. CTRL+D at the
end-of-file (EOF) will reset your printer to its default settings to
ensure that the current print job will not affect future print jobs.
However, activating this setting may cause the print job to fail if
it is connected through a network instead of the parallel or serial
interface.
Display alert for applications incompatible with driver features
Select this check box if you want the printer driver to display
messages to alert you to incompatibilities between the printer's
features and those of the application that you are using to print.
Restore Defaults
Click this button to reset the settings on this sheet to their default
values.
Using the PostScript Printer Software (Windows)
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