Detection, classification and mutual recognition of 4 pair power over ethernet

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United States of America Patent

PATENT NO 9823720
APP PUB NO 20160259387A1
SERIAL NO

15152962

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Abstract

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A method for verifying interconnection of a PSE and PD with 4-pair PoE capabilities includes performing a first classification event on first and second pairs, respectively, and detecting a first predetermined class current on first and second sets of twisted pairs, respectively. The method includes performing a second classification event on first and second pairs, respectively, and detecting first and second predetermined class currents on first and second pairs, respectively. After expiration of a first variable delay period related to a first pseudo-random variable of the PSE, the method includes performing a third classification event on the first pair and detecting a first derived class current on the first pair. After expiration of a second variable delay period related to a second pseudo-random variable of the PD, the method includes performing the third classification event on the second pair and detecting a second derived class current on the second pair.

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Patent Owner(s)

  • CISCO TECHNOLOGY, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barrass, Hugh Milpitas, US 28 407
Vetteth, Anoop Fremont, US 21 166

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