The cumulative effect of efficiency improvements can be quite substantial
Power over Ethernet (PoE) standards have made it possible to deliver power to networkdevices along the same Ethernet cable used for data, eliminating the need to provide a‘wall wart’ power cube for each device.
Network power is thereby consolidated at the
Power Sourcing Equipment (PSE) in the data-center, which has tremendous benefits of
lowering cost, simplifying infrastructure and providing backup power management.
Overall power management has been crudely addressed in previous-generation PoE
clients via power classification, but these have largely been limited and static solutions.
Download full PDF below