About: http://webisa.webdatacommons.org/425560661

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	PSTN transmission follows some common standards such as ITU and IEEE and country-specific standards like TR-57 and TIA standards [TR-NWT-000057 (1993), TIA/EIA-470C (2003), IEEE-STD-743 (1995)].
http://www.w3.org/ns/prov#wasQuotedFrom	what-when-how.com