What is the best VOIP toolset for use with .Net development?

Question

I have a need to explore VOIP integration into a .Net application. It would be incredibly helpful if the toolset was usable via ASP.Net (version 2.0 or higher), and provided the developer the option to allow interaction on the client either embedded within the web browser or external to the client web browser. It should be compatible at a minimum with Internet Explorer, but would be better if browser independence were an option.

Answer 1

I don't really understand your question -- what are you trying to DO with VoIP? Since you mentioned ASP.NET I'm guessing you mean some kind of server app? If you explain more about what you want to do, we can give you better advice.

You could check out Microsoft's Speech stuff: http://www.microsoft.com/speech/speech2007/default.mspx. As I understand it, Speech Server was moved into being part of OCS. I remember that it supported using .NET 3.0's Workflow Foundation as well as some multi-modal stuff with ASP.NET.

FreeSWITCH is a flexible VoIP system that works for both large-scale server implementations as well as embedded scenarios (say as an ActiveX softphone). There is full .NET and Mono support via mod_managed. (This allows you to create voice applications in FreeSWITCH using any .NET language.) There's also an XML-based API that allows you to send and receive events to control a remote FS server. You could use this from ASP.NET. FreeSWITCH is very active in #[email protected] so you can get a lot of advice there.