Hi all, I wonder if anyone can assist me with this - My company does BOTH wireless Internet and VoIP telephony (through Elastix). At the moment we're using 2 different accounting/billing systems, one being the A2B (VoIP) and the other Quick Books & Paessler for Internet usage. I'm looking for a "One-system" solution, be it open source or commercial. It should run on Windows, as all our branch and head-office servers are Win 2003. Any advice please?