Lexmark 12N0011 User's Guide - Page 288

RS-422 Polarity Purpose: To establish the behavior of the positive and negative signals when using RS-422 serial communication. Values: Normal* Reverse Uses default definition of one and zero. Reverses the definition of one and zero, thereby allowing a positive connection to a host computer's negative terminal without changing the physical cable. Serial Buffer Purpose: To configure the size of the serial input buffer. Values: Disabled Auto* 3K to maximum size allowed 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, infrared, LocalTalk, and USB buffers. Note: Changing the Serial Buffer menu item automatically resets the printer. See also: Resource Save 286