A method and apparatus are provided for determining resistive power loss through a channel between Power Sourcing Equipment (PSE) and a Powered Device (PD). The method includes (1) receiving indication that a PSE signal measurement is available from the PSE or a PD signal measurement is available from...http://www.google.de/patents/US7818591?utm_source=gb-gplus-sharePatent US7818591 - Techniques for measuring network channel resistive loss between a power-sourcing apparatus and a powered device
