Hosted Telephony, or Cloud Telephony is a service that delivers all the features and more of a traditional PBX but as a hosted service. Many advantages companies that use it experience are the elimination of installation, operation and maintenance costs of their on-premise VoIP PBX
A Hosted PBX still allows companies to utilise and take complete advantage of their phone system’s feature set such as voicemail, faxing, automated greetings, conferences and so on.
Companies that offer Hosted PBX’s as a service to their customers handle the call routing or switching as well as all maintenance involved in the hosted PBX service.
There are three ways that a hosted service works; either over the Public Switched Telephone Network (PSTN) over the Internet (hosted IP Service via Internet Telephony or Voice Over IP, VoIP) or with a combination of the two.