Lexmark C912 User Reference Manual page 86

Menu Item Purpose
NPA Mode To specify whether the printer
performs the special processing
required for bidirectional
communication, following the
conventions defined in the
Network Printing Alliance (NPA)
Protocol.
Note: Changing this menu item
automatically resets the printer.
Parity To select the parity for serial input
and output data frames.
RS-232/RS- Designates the serial
communication configuration:
422
RS232 or RS422.
RS-422 This allows the user to specify the
RS-422 polarity if RS-422
Polarity
communications is active for the
serial port.
Note: Only displayed if the port
supports an RS-422 configuration,
For example, the physical port
hardware supports RS-422.
Note: Only displayed when the
RS-232/RS-422 port printer setting
is set to RS-422.
PCL To configure the printer so it
automatically switches to PCL
SmartSwitch
emulation when a print job
received through the serial port
requires it, regardless of the
default printer language.
Using printer menus
Values
On
Off
Auto*
Even
Odd
None*
Ignore
=RS-232*
=RS-422
=Normal*
=Reverse
On*
Off
Serial Menu
81
Printer performs NPA processing.
If data is not in NPA format, it is
rejected as bad data.
Printer does not perform NPA
processing.
Printer examines the data to
determine the format and then
processes it appropriately.
Printer examines data on the serial
interface and selects PCL
emulation if the data indicates that
is the required printer language.
Printer does not examine the
incoming data. The printer uses
PostScript emulation to process
the job if PS SmartSwitch is On, or
uses the default printer language
specified in the Setup Menu if PS
SmartSwitch is Off.