Hello shif and welcome to the Hosted PBX Beta, you can find an explaination of the various functions of the PBX here: http://www.voipo.com/help/category/hosted-pbx-beta/. An installation guide is in the works as well. As for the phone number, you will need to use your current voip service provider or sign up for VOIPo Phone service.

The Hosted PBX does not include phone service.