Patent
Powered device classification in a wired data telecommunications network
Roger Karam,John F. Wakerly +1 more
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TLDR
In this paper, the authors present a power discovery process for wired data telecommunication network power sourcing equipment (PSE) coupled to a powered device (PD) in which the PD is adapted to receive the power level corresponding to that class.Abstract:
In a wired data telecommunication network power sourcing equipment (PSE) coupled to a powered device (PD) carries out an inline power discovery process to verify that the PD is adapted to receive inline power, then a plurality of classification cycles are carried out to convey a series of inline power classes back to the PSE. The series of inline power classes may all be the same, in which case the PD is legacy equipment and is adapted to receive the power level corresponding to that class. If they are not all the same, information is thus conveyed to the PSE which may, for example, correspond to a specific power level to be applied or to other information.read more
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References
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Patent
Power transfer apparatus for concurrently transmitting data and power over data wires
TL;DR: In this article, a power and data coupler couples the network data signal and the power signal, received through a data input and a power input respectively, and transmits the coupled signal, to a distance of three meters or more, over the transmission line.
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Hanz Werner Herrig,David Nicholas Horn,Daniel Vern Peters,Randy Dean Pfeifer,Wayne Richard Wilcox +4 more
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