This all seems very disorganized. Co-operation is
needed to build a
comprehensive solution. Perhaps a modular session border controller where
one module is Openser and the others are a B2BUA and a media proxy. They
would be optimized to work well together, possibly using non-sip
communication. They could also be used independently. The building blocks
are available they just need to be tweaked.
OpenSer + MediaProxy + Radius + CDRTool provides a complete and integrated
solution (except Sessiontimers).
What's your call limit? what is the maximun calls you can take with one
media-proxy? 100?