About: http://webisa.webdatacommons.org/401780341

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	The IP telephony signaling protocol supports such features as conference calling, call waiting, call transfer, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com