I built one of the fist comprehensive call detail record collection systems for a SIP voip network. I also built a least cost routing system for same. A option

I built one of the fist comprehensive call detail record collection systems for a SIP voip network. I also built a least cost routing system for same. A options feed aggregation and charting backend. A package management system. many many other small apps. Cheers, Martin Logan erlangcamp.com