Hello, I'm new to the IP PBX world, and therefore have no idea how and if what I want to do can be done. We are a charity in London, Ontario, looking to bring our external sites into our PBX system for as cheaply as possible. We currently use a Panasonic Digital PBX at the head office with 11 extensions plus one fax, and 4 external lines. I would like to convert our system to a 3CX system, but I'm not sold yet on VoIP. We have 10 other locations in the London area, however the sites are not connected to each other even through a VPN. Phone requirements will be as small as 1 phone at some locations, to as many as 26 at another (which I may want a second PBX at, yet integrate the extensions). Basically I want the sites to operate as remote, external extensions of our home office using the Internet, but not a VPN setup, and to do it as cheaply as possible. I also want to use existing phones as much as possible, even if that means I need to get ATAs. Thanks for the help. You can also reach me at email@example.com. I'd like to place the order for the system by the end of August.