Power supply current, sufficient to power a remote network device, is transmitted concurrently with a network data signal over a transmission line. A power-sourcing network device that can include a coupling circuit provides power and data to the remote network device. The coupling circuit can also be...http://www.google.es/patents/US6710704?utm_source=gb-gplus-sharePatente US6710704 - Power transfer apparatus for concurrently transmitting data and power over data wires
Power transfer apparatus for concurrently transmitting data and power over ...
