Hello Marha,
I am a Canadian Technology developer exert with over 25 years. I am a VOIP/Asterisk expert since 1998. I am an expert in Electronics, Programming (C,C++,PHP,Assembly,Java, etc) and also GSM/VOIP/PSTN/SAT, etc.
I have many products for Asterisk (incuding my own customized Asterisk version). I recently finished two call center products for Australia and Montreal.
Your requirements is not a problem, I can develop it quickly by using my existing code and skills.
I am also willing to negotiate on the price.
If you contact me for this order please give me a day to respond as sometimes email does not get delivered from this site to me.
Thank you.
Warm regards,
Anthonus.