Lexmark C912 User Reference Manual page 87

Menu Item Purpose
PS To configure the printer so it
automatically switches to
SmartSwitch
PostScript emulation when a print
job received through the serial port
requires it, regardless of the
default printer language.
Robust XON To determine whether the printer
communicates availability to the
computer.
This menu item only applies to the
serial port if Serial Protocol is set
to XON/XOFF.
Serial Buffer To configure the size of the serial
input buffer.
Note: Changing the Serial Buffer
menu item automatically resets the
printer.
Serial To select the hardware and
software handshaking values for
Protocol
the serial interface.
Using printer menus
Values
On*
Off
Off*
On
Disabled
Auto*
3K to
maximum
size allowed
DTR*
DTR/DSR
XON/XOFF
XON/XOFF/
DTR
XONXOFF/
DTRDSR
Serial Menu
82
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.
Disables job buffering. Any jobs
already buffered on the disk are
printed before normal processing
of incoming jobs resumes.
Printer automatically calculates the
Serial Buffer size (recommended
setting).
User specifies the Serial Buffer
size. The maximum size depends
on the amount of memory in your
printer, the size of the other link
buffers, and whether Resource
Save is set to On or Off. To
maximize the range for the Serial
Buffer size, disable or reduce the
size of the parallel, and USB
buffers.
Hardware handshaking.
Hardware handshaking.
Software handshaking.
Combined hardware and software
handshaking.
Combined hardware and software
handshaking.