About: http://webisa.webdatacommons.org/84983452

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In another aspect, the invention is a system where one or more non-IP digital PBX telephone handsets are coupled to a proprietary IP telephone call controller in a private telephone network.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com