Lexmark 1200 manual Serial Menu

		Serial Menu	Use the Serial Menu to change settings affecting jobs sent
			to the printer via the serial interface port. This menu is
			only available if an optional tri-port adapter is installed in
			your printer.
			When you select Serial Menu from the operator panel,
			Serial Option 1 or Serial Option 2 appears on the second
			line of the display, depending on whether a tri-port
			adapter is installed in connector 1, connector 2, or both.
			When the correct option is displayed, press Select to view
			the menu items listed in the following table.
Serial Menu
Menu item		Values
PCL SmartSwitch		Off
		On*
		Setting PCL SmartSwitch On lets the printer examine the data on the serial interface
		connection and select PCL emulation if the data indicates that is the printer language.
		If both PCL SmartSwitch and PS SmartSwitch are set Off, the printer uses the language
		specified in the Printer Language menu as the default. If only one SmartSwitch setting is set
		Off, the printer uses the language that has its SmartSwitch setting set On as the default.
PS SmartSwitch	Off
		On*
		Setting PS SmartSwitch On lets the printer examine the data on the serial interface
		connection and select PostScript Level 2 emulation if the data indicates that is the printer
		language.
		If both PCL Smartswitch and PS Smartswitch are set Off, the printer uses the language
		specified in the Printer Language menu as the default. If only one SmartSwitch setting is set
		Off, the printer uses the language that has its SmartSwitch setting set On as the default.
NPA Mode		On
		Off
		Auto*
		NPA is a mode of bidirectional communication that follows the conventions defined in Network
		Printing Alliance Protocol, A Printer/Host Control Specification Developed by the NPA.
		NPA mode requires special processing of the print data. If NPA Mode is set On, the data
		received must be in NPA format. If not, it is rejected as bad data. If NPA Mode is set Off, the
		printer does not perform any NPA processing. If NPA Mode is set to Auto, the printer examines
		the data to determine the format and then processes it in either format.
		The NPA Mode setting in the Serial Menu applies only to the serial interface connection.
		Note: Changing the NPA Mode setting automatically resets the printer.
*Factory default

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