3CX complete successful integration testing with Spanish VoIP Provider, Masquevoz, to deliver an affordable, top quality VoIP PBX solution for all 3CX Phone System customers. London, UK and Valencia, Spain – February 20, 2012 – 3CX, developer of the popular Windows-based VoIP PBX, 3CX Phone System, has announced that interoperability testing with Masquevoz has proven…