I made a aestrix set up fine in my server . Now i need to work on invoking call . I am successfully able to make a call . Now i need to know how to get the user clicked digits in DTMF event and also if user press 3 or any number i need to play back the sound . In net i studied little it s little confusing me . I am newbie to aestrix . Thanks for your kind help . Suggest me any sites or tutorials such that i can learn more about aestrix .