hi.i have 11 years expereince with asterisk. bid is for 1)asterisk install, 2) simple web allowing add did+pin code 3) simple conference dialplan.4) on trunk setup for inbound dids(you provide contract with voip provider)
I can build the conference call system for you, but you'll need to flesh out some of the details. The bid is a placeholder, and I can give you a better estimation once I know more of what you want.