Hi I can develop your project in 3-4 days of time. I had an experience of around 5 years in Asterisk. Capable of changing asterisk source code as well. I have done a lots of projects for various TV Channels, radio etc which include IVR for Election process in India, Gujrat Earthquake help line, Voting lines for various TV and radio contest, Call center application etc. So you can count on me for the project. I will develop the project in such a manner so that for every small changes you don't need to redevelop the application you can only change the configuration file to change prompts etc.