Lexmark x950 series User Manual page 55

Additional printer setup
Note: Serial printing reduces print speed.
1
Set the parameters in the printer.
a
From the control panel, navigate to the menu for the port settings.
b
Locate the menu for the serial port settings, and then adjust the settings, if necessary.
c
Save the settings.
2
From your computer, open the printers folder, and then select your printer.
3
Open the printer properties, and then select the COM port from the list.
4
Set the COM port parameters in Device Manager.
Use the Run dialog box to open the command prompt, and then type devmgmt.msc.
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