actually , it is simple ...
just need to install asterisk , A2billing 1.4 , FreePBX GUI on dedicated server to work all without problems ... + a specific module for callshop
10 freelancers are bidding on average $174 for this job
Assalaam alaikum. Let me do this using my years of experience in Software Support. I am BE IT. Hope to read positive reply from you. Regards, Ehteshaam