AMT Datasouth 6000 - Manual (Page 74)

Fastmark 6000 Series User's Guide 73
Serial port settings
Baud rate: 2400, 4800, 9600, 19200 and 38400.
To change the Baud Rate use the switches on the back of the printer. See the
Back Panel Switches section for more details.
Data format: always 8 data bits, 1 start bit and 1 stop bit.
Parity: always no parity
Handshaking: XON/XOFF as well as CTS/RTS (hardware flow control).
Note: If you run an application with the bundled printer driver under Windows and use
the serial port, you should check the above parameters and set the flow control to
“Xon/Xoff” or “hardware”.