Power over Ethernet
OverviewTechniquesStandards developmentUsesTerminologyPower management features and integrationStandard implementationNon-standard implementations
There are several common techniques for transmitting power over Ethernet cabling, defined within the broader Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard since 2003. The three techniques are: • Alternative A, which uses the same two of the four signal pairs that 10BASE-T and 100BASE-TX use for data in typical Cat 5 cabling, i.e. pairs 2 and 3.