About: http://webisa.webdatacommons.org/374767206

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	Signals such as DTMF tones and other required signals generated by the digital signal processor are converted to analog by codec circuit 86 and transmitted out over the telephone line 90 via a telephone speech network 92.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com