A platform provides access to multiple telecommunications services via a single telephone number. These services may include, for example, voicemail services, facsimile messaging services, paging services, and outbound calling services. A guest caller may call the single phone number to speak to a subscriber,...http://www.google.com/patents/US6795532?utm_source=gb-gplus-sharePatent US6795532 - Single telephone number access to multiple communication services
