An Ethernet-type local area network having multiport repeaters and nodes within a specified distance of the hub is able to communicate high speed digital data over multiple pairs of twisted-pair wires using long symbol group-type ternary coding. Bundle mode termination minimize impedance mismatches....http://www.google.de/patents/US5614905?utm_source=gb-gplus-sharePatent US5614905 - High speed serial digital data to analog signal converter
