BURRAAK, it's been almost a year since your original poste so I was wondering if you've made any progress? I am working on a project in which I am in need of a very similar item. Do you have any leads or suggestions on where I might find information to help me complete this? I have a Mega connected to a MAX232 chip which is connected to a 56K faxmodem which connects to the phone line. I have no working sketch yet and to be honest don't really know where to even begin. Any help at all would be appreciated.