Konica Minolta QMS magicolor CX Reference - Manual (Page 33)

Administration
Menu
1-25 Printer Configuration
Stop Bits
Sets the number of stop bits transmitted per character.
Menu
Administration
Communications
Serial
Stop Bits
Choices
1 Bit (default), 2 Bits
Hardware Flow Control
Controls the flow of data between the printer and the host.
Menu
Administration
Communications
Serial
Hdwe Flow Ctl
Choices
DSR POL: Normal (default), reverse
DSR: Off (default), on
DTR POL: Normal (default), reverse
DTR: Off, on (default)
RTS: Off (default), on
CTS: Off (default), on
Notes: If the host uses hardware flow control, set this option to match the
type used by the host.
However, to download printer system software to flash ROM via the serial
port, RTS and CTS must be set to On, and the cable pinouts must be
connected as shown in chapter 3, “Technical Specifications.”