Users can download the firmware into the I-7243D as following steps:

1.	Power-off the I-7243D

2.	Grounding the INIT pin of the I-7243D

3.	Install the download cable between COM1 of the I-7243D & COM1 of PC 

4.	Power-up the I-7243D & Run 7188xw.EXE

5.	Then press F4 button to load firmware automatically.

	PS: the firmware files are "MbtdmXXX" and "autoexec.bat".
 	    These two files and the 7188xw.exe must be in same directory.

6.	Removing the line between the INIT pin and Ground pin

7.	Then Key-in “reset” to restart the I-7243D

8.	Pressing Alt & X at the same time will quit the 7188xw.EXE