In simple terms hosted telephony is an offsite system that sits in a data centre (known as the Cloud) rather than at your premises. Calls are made and received over an internet connection to the network. From there they are routed to the normal phone network and mobile devices. Companies manage the system through a web interface or mobile app.
Exchange Communications offers subscription services hosted in the cloud for high-performance video conferencing, voice over IP, unified communications, and remote collaboration. With each of these easy-to-use services, you eliminate capital investment and gain the ability to scale the services to meet your changing needs.