Epson EPL-N1200 Reference Manual page 130

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.
XOn/XOff
Use this option to set the XOn/XOff communications protocol
to On, Off, or Robust. You can use XOn/XOff protocol in
combination with the DTR option setting. If set to Robust, the
printer sends an XOn signal when the printer is available to
receive data.
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.
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. The factory default setting is
Normal.
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SelecType