Lexmark C935 manual 105, Serial Buffer

Menu item	Description
PS SmartSwitch	Sets the printer to automatically switch to PS emulation when a print job
On	received through a serial port requires it, regardless of the default printer
	language
Off
	Notes:
	•	On is the factory default setting.
	•	When the Off setting is used, the printer does not examine incoming data.
	•	When the Off setting is used, the printer uses PCL emulation if PCL
		SmartSwitch is set to On. It uses the default printer language specified in
		the Setup menu if PCL SmartSwitch is set to Off.
NPA Mode	Sets the printer to perform the special processing required for bidirectional
On	communication following the conventions defined by the NPA protocol
Off	Notes:
Auto	•	Auto is the factory default setting.
	•	When the On setting is used, the printer performs NPA processing. If the
		data is not in NPA format, it is rejected as bad data.
	• When the Off setting is used, the printer does not perform NPA processing.
	•	When the Auto setting is used, the printer examines data, determines the
		format, and then processes it appropriately.
	•	Changing this setting from the control panel and then exiting the menus
		causes the printer to restart. The menu selection is updated.
Serial Buffer	Sets the size of the serial input buffer
Disabled	Notes:
Auto	•	Auto is the factory default setting.
3k to <maximum size
	•	The Disabled setting turns off job buffering. Any jobs already buffered on
allowed>
		the disk are printed before normal processing is resumed.
	•	The serial buffer size setting can be changed in 1k increments.
	•	The maximum size allowed depends on the amount of memory in the
		printer, the size of the other link buffers, and whether Resource Save is set
		to On or Off.
	•	To increase the maximum size range for the Serial Buffer, disable or
		reduce the size of the parallel, serial, and network buffers.
	•	Changing this setting from the control panel and then exiting the menus
		causes the printer to restart. The menu selection is updated.
Job Buffering	Temporarily stores jobs on the printer hard disk before printing
Off	Notes:
On	•	Off is the factory default setting.
Auto
	•	The Off setting does not buffer print jobs to the hard disk.
	•	The On setting buffers jobs on the printer hard disk.
	• The Auto setting buffers print jobs only if the printer is busy processing data
		from another input port.
	•	Changing this setting from the control panel and then exiting the menus
		causes the printer to restart. The menu selection is updated.

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