About: http://webisa.webdatacommons.org/125845088

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	However, there is a problem in the full-duplex system that the use of the two signal lines causes a large-scale construction of the signal lines for long distance communication.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com