Hello I'm looking for a Windows-based solution. 3CX looks interesting. But unless I overlooked it, I haven't seen information on the site explaining the differences between the free and the commercial versions. Does someone have a pointer? - edit - We'll just install a single Digium or Sangoma FXO card, and a Windows PBX, and buy a few IP phones for people either working on the same site as the PBX, or remotely through the Net. Thank you.