A method for determining if a cable is present at a network connection, and adjusting a power signal to the network connection depending upon whether or not a cable is present is disclosed....http://www.google.fr/patents/US6618814?utm_source=gb-gplus-shareBrevet US6618814 - System for conserving power by ceasing at least one clock signal from PHY layer to MAC layer in network adapter if signal from cable is not detected
System for conserving power by ceasing at least one clock signal from PHY ...
