Cloud telephony (also known as hosted telephony) refers specifically to voice services and more specifically to the replacement of conventional commercial telephone equipment, such as a PBX (PBX), with third party VoIP service.
Cloud Telephony is the technology that transforms your business telephone system into a commercial phone in the cloud. It is a voice and messaging service that replaces the need for the conventional commercial telephony system such as PBX, EPBAX, etc. And most of the time, it's simple enough for everyone to understand, make / receive (pick up) a phone call, hang up or unplug the call, play an audio file, transfer calls, call forwarding, call conference! with Cloud Telephony, this type of telephony functions can be added to any computer application.