About: http://webisa.webdatacommons.org/423851834

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	By using a terminal program such as HyperTerminal or custom developed software, an attached radio transmitter can be keyed and continuous or momentary DTMF digits can be sent at any interval.
http://www.w3.org/ns/prov#wasQuotedFrom	icircuits.com