About: http://webisa.webdatacommons.org/405381844

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	These systems carried both voice and data, which solved the problem as long as there was a direct link between the two substations.
http://www.w3.org/ns/prov#wasQuotedFrom	electricenergyonline.com