AMT Datasouth Fastmark 4000 - Manual (Page 82)

User's Guide 81
Serial port settings
Baud rate: 2400, 4800, 9600, 19200 and 38400.
To change the Baud Rate:
FM4402: Send the KI8
n command to the printer. See the System
Setting Commands section for more details.
FM4602/4603: The switches on the back of the printer control Baud Rate.
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”.