About: http://webisa.webdatacommons.org/78449510

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	If the PTT button has been pushed, an appropriate PTT code is transmitted subaudibly by the portable to the mobile for a predetermined period of time, such as two seconds.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk