Hi ,I am Gang ,software developer in China.
I am a certificated freelancer with over 700 good reviews from my clients.
I have ever developed application similar to what you need.
Relevant Skills and Experience
VoIP, Asterisk ,Freeswitch, Streaming ,OpenSIPS
Proposed Milestones
$5154 USD - payment schedule
I am very interested in your project , that is why I have much experience about it.
plz contact me.