Lexmark C790 manual Understanding printer menus, Menu item, NPA Mode, Serial Buffer, Job Buffering

Menu item

NPA Mode

Auto

On

Off

Serial Buffer

Auto

3KB to [maximum size allowed] Disabled

Job Buffering

Off

On

Auto

Protocol

DTR

DTR/DSR

XON/XOFF

XON/XOFF/DTR

XONXOFF/DTRDSR

Description

Sets the printer to perform the special processing required for bidirectional communication following the conventions defined by the NPA protocol

Notes:

•Auto is the factory default setting. Auto sets the printer to examine data, determine the format, and then processes it appropriately.

•When set to On, the printer performs NPA processing. If the data is not in NPA format, it is rejected as bad data.

•When set to Off, the printer does not perform NPA processing.

•Changing this setting from the printer control panel and then exiting the menus causes the printer to restart. The menu selection is then updated.

Sets the size of the serial input buffer

Notes:

•Auto is the factory default setting.

•Disabled 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 1-KB 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 printer control panel and then exiting the menus causes the printer to restart. The menu selection is then updated.

Temporarily stores print jobs on the printer hard disk before printing

Notes:

•Off is the factory default setting. The printer does not buffer print jobs on the printer hard disk.

•On buffers print jobs on the printer hard disk.

•Auto buffers print jobs only if the printer is busy processing data from another input port.

•Changing this setting from the printer control panel and then exiting the menus causes the printer to restart. The menu selection is then updated.

Selects the hardware and software handshaking settings for the serial port

Notes:

•DTR is the factory default setting.

•DTR/DSR is a hardware handshaking setting.

•XON/XOFF is a software handshaking setting.

•XON/XOFF/DTR and XON/XOFF/DTR/DSR are combined hardware and software handshaking settings.

Understanding printer menus

112