How to get started on VOIP programming? [closed]

Question

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How to start developping a VoIP product.

I'd like to hear something of the experienced,

thanks in advance!

Answer 1

voip programming,voip programming Tutorial, Tutorials voip ...

http://www.roseindia.net/tutorialsearch/?t=voip+programming

What is VoIP and How it Works

http://faq.programmerworld.net/voip/voip.htm

Answer 2

I came across a site GNY which seems to include some stuff about voip, in the greater context of phreaking.