AMT Datasouth Fastmark 4000 - Manual (Page 15)

14 User's Guide
The factory default parameters of serial port are:
Speed (baud rate) 9600
Data format 1 start bit, 8 data bits and1 stop
bit.
Parity None
Handshaking (Flow control) XON/XOFF as well as RTS/CTS
Note: It is not necessary to set a switch or send a command for the
parallel and serial port selection. The printer automatically detects
the active port.
Print a SELF-TEST to review serial settings.