About: http://webisa.webdatacommons.org/120947086

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	A tone signal is a signal which is sent out from the data terminal device 3 when a dialing button on the data terminal device 3 is pressed by a recipient.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk