Epson EPL-N2700 Reference Manual page 118

Parity
When this option is set to None, parity checking is disabled. The
parity bit, if used, provides a basic form of error detection. See
your computer manual and software documentation for the
proper setting.
Stop Bit
Use this option to set the number of stop bits for each character
of information sent to the printer. Stop bits signal the end of a
character.
DTR
Use DTR (Data Terminal Ready) to turn the printer's DTR
communications protocol on or off. You can use DTR protocol in
combination with the Xon/Xoff option setting.
Xon/Xoff
Use this option to set Xon/Xoff communications protocol. You
can use Xon/Xoff protocol in combination with the DTR option
setting. If set to Robust, the printer sends an Xon signal every
second while the printer is waiting to receive data.
Buffer Size
Determines the amount of memory to be used for receiving data
and printing data. If set to Maximum, more memory is allocated
for receiving data. If set to Minimum, more memory is allocated
for printing data.
SelecType Settings
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