trixbox Pro is the newest addition to the trixbox family. trixbox Pro is just like PBXtra, except the server is hosted on your end, and you can use any server you would like. As well, you have a choice if using the free version or various other versions that can do much more. trixbox Pro is hybrid-hosted, meaning that you can access the user interface remotely from anywhere, and you can connect remote phones to a hostname that Fonality assigns to you.
Aside from common PBX calling features, trixbox Pro provides advanced features that are useful to almost any company. You will get HUD, which is a program on your computer where you can see who is on the phone, who is in the parking lot, and other features that have to do with managing phone calls. It is like an "operator" on your computer. In addition to HUD, if you have multiple sites and want to have a PBX at each or some sites, you can easily branch multiple boxes with a click of a button. Since trixbox Pro is hybrid hosted, you can set up alerts and you will know if your PBX ever goes down. Have you even seen that? For those running call centers, trixbox Pro Call Center Edition beats any other PBX when it comes to call centers. It even beats trixbox CE! There are much more other features that you should look at. trixbox Pro is a "must have" PBX system.