About: http://webisa.webdatacommons.org/168756308

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	FIG. 1B is a block diagram of another type of prior art ISDN modem system incorporating a phantom power feed from a telephone system central office.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com