An xDSL modem having an adaptive hybrid termination impedance. The modem has a transformer with two cores, one connected to the modem's receiver and the other connected to the modem's transmitter. The two cores share an adjustable termination impedance. The modem determines which impedance setting to...http://www.google.com/patents/US7881458?utm_source=gb-gplus-sharePatent US7881458 - Method and apparatus for adaptive hybrid termination in a multi-carrier communication system
