The MUX plays a middle layer role between M-cpu and A-cpu. It handles the commands from A-cpu (RIL driver)to M-cpu, and vice versa the responses. The diagram briefly shows the design idea and the READ working flow of my MUX in the Windows mobile system. (July, 2007)

Sample Code: (password needed)

http://www.keepandshare.com/doc/view.php?id=1374872&da=y