A cloud PBX system is based on Cloud Computing technology, where data is stored and transferred over the Internet, rather than on a computer or piece of hardware that an end-user owns. Cloud PBX gives you access to PBX capabilities without the need for complicated and expensive equipment. Cloud PBX is a kind of Hosted PBX or virtual PBX, meaning that all of the routing services are performed by your VoIP provider, rather than by an employee managing a PBX system in your office.