An apparatus, system, and method for providing DC battery backup power to Power over Ethernet, (PoE) Mid Span or End Point Power Sourcing Equipment, (PSE), such that in the event of the loss of utility power the PSE device is able to continue to provide power for some time while battery capacity remains....http://www.google.de/patents/US7498692?utm_source=gb-gplus-sharePatent US7498692 - Power over ethernet battery backup
