What is a Virtual PBX, and how is it different from a Business VOiP?
I'm posting this, because this is a question that comes up every time I tell someone about virtual pbx services.
Virtual PBX: A virtual PBX service is basically Google Voice for business. The service provider gives you a number that, when called, rings an auto-attendant. You determine what the auto attendant tells the caller (eg: "Press one for Bill, two for Bob, or three for Sales) that forwards the caller to any number(s) that you designate (eg: if they press one for Bill, the call goes to Bill's cell phone; if they press two for Bob, the call goes to Bob's home phone; if they press three for sales, the call goes to Nancy's cell phone). No hardware included. The system also may include features like, corporate voicemail, smartphone apps, caller ID, conference calling, call transferring, etc). These services are billed monthly based on usage (usually $10/ month for 150 to 300 minutes to $60/ month for high usage or unlimited).
Business VOiP: A business VOiP service uses VOiP phone lines (same technology as Vonage) and actually gives you physical telephones (that plug directly into the internet) to use with them. They also include a virtual pbx service that provides you with all the call forwarding and call management features of a virtual pbx. These services are charged per user per month (usually around $25-$35/ month each)+ the costs of the phones (roughly $200 each).
For example: RingCentral currently offers both of these services. RingCentral Mobile is a virtual pbx. RingCentral Office is a Business VOiP.
Also- here is the ChooseWhat.com comparison and reviews section of virtual pbx services: http://virtual-pbx.choosewhat.com/