Serial Protocol; Rs-422 Polarity; Serial Buffer - Lexmark C720 User Reference Manual

RS-422 Polarity

Purpose:
To establish the behavior of the positive and negative signals when using RS-422 serial
communication.
Values:
Normal*
Reverse

Serial Buffer

Purpose:
To configure the size of the serial input buffer.
Values:
Disabled
Auto*
3K to maximum
size allowed
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
Uses default definition of one and zero.
Reverses the definition of one and zero, thereby allowing a positive connection to a host
computer negative terminal without changing the physical cable.
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.
Hardware handshaking.
Hardware handshaking.
Software handshaking.
Combined hardware and software handshaking.
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