What sipstack is most .Net friendly?

Question

I'm looking for a sip stack that can be used in .Net to create a pbx. Are there any other than these two:

• http://sipsorcery.codeplex.com/
• http://www.codeproject.com/KB/cs/SIP_stack_with_SIP_proxy.aspx

If not, are there any .net wrapper (to create a pbx, not a ua) available to a c/c++ stack?

If not, which stack would you create a wrapper for, and why?

Answer 1

A lot of .NET libraries are wrappers around existing C++ libraries (e.g. PJSIP). There are some that are fully managed:

Konnetic povide fully managed SIP components for .NET development. They have .NET SIP SDK available.

Otherwise, Microsoft's Lync server comes with a very good managed SIP library, available here: www.microsoft.com/en-us/lync/default.aspx

Answer 2

Why would you want to write a PBX when there are so many available? Asterisk is the first one that comes to mind, but there are Yate, CallWeaver, and a bunch more.

Are you looking for a proprietary stack or an open-source stack?

Answer 3

If you're looking to develop a PBX you'll need media processing capabilities and as far as the sipsorcery stack goes I can tell you that it doesn't have any since I wrote it.

I'd recommend having a look over another codeplex project called Call Butler. It's not under active development anymore as far as I can see but it is more of a fully fledged PBX and is at least partially written in .Net. I think that project may have used some 3rd party libraries for bits and pieces so be aware that you may find some ommissions if you're after the full source code.