Epson EPL-N2750 Reference Manual page 61

Baud Rate
Use this option to set the data transfer rate (baud) for the serial
interface. The baud rate is measured in bits per second (bps). See
your computer manual and software documentation for the
proper setting.
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.
DSR
When DSR (Data Set Ready) is set to Off, the signal level is
permanently set high, allowing the printer to send data to the
computer. For most communications purposes, this option
should be set to Off (signal level high). When DSR is set to On,
data is sent to the computer only when the signal level is high.
Xon/Xoff
Use this option to set the 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.
3-28
Functions of the Control Panel