there's a correction in my schematic ..i'm using max 232 ...not max323....why must and is it necessary that the DB9 pin 4 and 6 shorted .7 and 8 shorted together ???since i canot make this work yet ..so plan to work on the micro C and phone commmunication ...flez ..do you have a schematic for your project ...can i have a look .....thx alot ....