Lexmark 20K1100 User's Reference - Page 160
NPA Mode, Parity, SmartSwitch, Robust XON, RS-232, RS-422, Network Printing Alliance NPA
UPC - 734646641005
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Using printer menus Menu Item NPA Mode Parity Purpose 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. To select the parity for serial input and output data frames. PCL SmartSwitch To configure the printer so it automatically switches to PCL emulation when a print job received through the serial port requires it, regardless of the default printer language. Values On Off Auto* Even Odd None* Ignore On* Off PS To configure the printer so it On* SmartSwitch automatically switches to PostScript emulation when a print job received through the serial port requires it, regardless of the default printer language. Off Robust XON RS-232/ RS-422 To determine whether the printer Off* communicates availability to the computer. On This menu item only applies to the serial port if Serial Protocol is set to XON/XOFF. To specify the type of serial communication. Note: Selecting RS-422 automatically sets Serial Protocol to XON/XOFF. RS-232* RS-422 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. Printer examines data on the serial interface and selects PostScript emulation if the data indicates that is the required printer language. Printer does not examine the incoming data. The printer uses PCL emulation to process the job if PCL SmartSwitch is On, or uses the default printer language specified in the Setup Menu if PCL SmartSwitch is Off. Printer waits to receive data from the computer. Printer sends a continuous stream of XONs to the host computer to indicate that the serial port is ready to receive more data. Sets serial communication to RS-232. Sets serial communication to RS-422. Serial Menu 160