What is cloud telephony?
Conventional business telephone systems relied on Private Branch Exchange or PBX networks where human operators would manage the switchboards to plug wires to close a call circuit. Organizations used the PBX system to carry out internal as well as external communications using different communication channels like VoIP, ISDN, or analog. Today, PBX phone systems are available as both on-premise and off-premise solutions. The latter is essentially referred to as cloud telephony, where the PBX system is hosted in a data center.