About: http://webisa.webdatacommons.org/5148536

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	Both PBX 19 and ToL server 17 can provide interconnection to a circuit switched network such as the public switched telephone network (PSTN) or ISDN network.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com