Lexmark W812 User's Reference - Page 158
Serial Buffer, Serial Protocol
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Serial Buffer Purpose: To configure the size of the serial input buffer. Values: Disabled Auto* 3K to maximum size allowed Disables serial (Parallel, USB) port. 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. Note: Changing the Serial Buffer menu item automatically resets the printer. See also: Resource Save Serial Protocol Purpose: To select the hardware and software handshaking values for the serial interface. Values: DTR* DTR/DSR XON/XOFF XON/XOFF/DTR XONXOFF/DTRDSR Hardware handshaking. Hardware handshaking. Software handshaking. Combined hardware and software handshaking. Combined hardware and software handshaking. See also: Technical Reference 158