VoIP Primer
As a buyer of VoIP services, you have many choices. There are many service providers with many different approaches to achieving the goal of delivering reliable business communications. The terms Hosted PBX, Virtual PBX and Business VoIP Service are used widely, but with different meanings.
We have attempted here to quickly help you understand the difference between some offerings. We hope this abridged reference will quickly help you understand what vendors are offering.