Hello, I have wide area experience in open source technology like php/c++/linux/so files/fusebox AND WINDOW based ASP,COM,DCOM,MTS,VB,VC++,.NET,Asterisk,Zaptel.
I have expertise in the installation and configuration of the Asterisk and zaptel. If you like i can send you my previous project details.
Please forward me your mail ID so i can forward you project proposal according your current requirement.
SG