About: http://webisa.webdatacommons.org/209248959

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 switch is a transistor or equivalent switch activated in the earpiece or phone from a DC signal generated by the touch-tone decoder upon recognizing a prescribed activation code.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com