A power supply subsystem for providing electrical power to at least node over communication cabling, the power supply subsystem comprising: a management and control unit; a power supply interface for distributing power into the communication cabling substantially without interfering with data communication;...http://www.google.es/patents/US7006815?utm_source=gb-gplus-sharePatente US7006815 - Power supply subsystem for powering a node over communication cabling
Power supply subsystem for powering a node over communication cabling
