Hosted private branch exchange (PBX) also referred to as virtual PBX, allows businesses to use sophisticated telephone systems without investing in the telecom equipment. The call platform is hosted at the service provider’s location. The subscribers connect via IP to the service provider for voice service. It is a cloud-based system that can be accessed via an IP network. As all services are hosted in the cloud operating costs are reduced. The service provider takes care of the hardware, software and necessary maintenance. Hosted PBX allows employees to work from home or their cellphones and still be connected to the office telephone system. Call routing and switching is handled by service providers at their own location. Such systems can function over public switched telephone networks (PSTN) and VoIP. Like a regular telephone system, calls can be transferred or put on hold, conference calls can be set up and the phone can be answered by an automated attendant who can route ca...