Hi Rob Redding and Michael Karas

OKey, the DAA i am using can connect to telephone line as well as TTL Level circuits. and i have checked it that if i feed any TTL level frequency to my DAA... that will be trmsmitted over the telephone.


OKey now what i want is to generate TTL level DTMF frequency from the microcontroller and feed this frequnecy in my DAA. So i need code which can do the job. any help in this regard will be highly appriciated.


Shahzad