Lexmark 25A0591, C736 manual Understanding printer menus 101, Serial Buffer, Serial Protocol

Understanding printer menus		101
	Menu item	Description
	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 allowed>
		• The Disabled setting turns off job buffering. Any jobs already buffered on 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.
	Serial Protocol	Selects the hardware and software handshaking settings for the serial port
	DTR	Notes:
	DTR/DSR
		• DTR is the factory default setting.
	XON/XOFF
		• DTR/DSR is a hardware handshaking setting.
	XON/XOFF/DTR
	XONXOFF/DTRDSR	• XON/XOFF is a software handshaking setting.
		• XON/XOFF/DTR and XON/XOFF/DTR/DSR are combined hardware and
		software handshaking settings.