Question

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.

Answer 1

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.