Brother International HL-2400C Service Manual - Page 384

USER'S GUIDE  Notes When you use the automatic interface selection, note the following:  Once the interface is automatically changed, it is not changed again for a short period of time. This time period is called "Time Out" and it can be set with the Mode button. The factory setting is 5 seconds.  The communications parameters [ baud rate, code type, parity, stop bit, Xon/Xoff, DTR(ER), and Robust Xon] must be set for the serial interface. Although they have been factory set as shown in the above table, you may need to change them with the Mode button.  This function takes a few seconds to work. If you want to speed up printing, select the required interface manually with the Mode button. If you constantly use only one interface, we recommend that you select that interface in the interface mode. The printer allocates all of the input buffer to that interface if only one interface is selected. 3-4