I want to dial-up through VoIP. Yes, I know that it's almost impossible. I have heard that softmodems use software for DSP, but I guess the code its hardware specific. If I only could isolate the code that makes the modem signal I could use it on my project. Anyone ever heard about a library that would fullfill my needs?
PS: iaxmodem only modulates fax signals.
I'm not sure if this will help you, but take a look at the Dialogic SDK and it's API manuals.
I've been doing some work on a Dialogic voice/fax board, and on one of the machines that I'm using I've set up the SDK but without having a board installed (they're pretty expensive).
I've noticed that on this machine, since I don't have the board installed, it's provided me with a softIP virtual-hardware board, managed by their software.
I haven't played with the VoIP stuff myself, but it might provide some of what you need.
Here's a screenshot.
Downloading and installing the SDK is free, though when you enter your details they will probably give you a call and try to sell you a board.
