07793124 is referenced by 7 patents and cites 7 patents.

A power sourcing equipment (PSE) device is disclosed that includes an interface adapted to communicate with a powered device via wire pairs of a cable, a power supply circuit adapted to provide power to the interface, and device detection logic to detect the powered device coupled to the interface. The PSE device further includes power classification logic coupled to the interface and adapted to provide a power classification signal to the powered device. The power classification signal includes a first power classification signal and a second power classification signal to identify a power classification associated with the powered device. The power classification logic monitors the interface to detect a device classification response from the powered device and determines the power classification associated with the powered device based on the device classification response.

Title
System and method of classification in power over ethernet systems
Application Number
11/967808
Publication Number
7793124 (B2)
Application Date
December 31, 2007
Publication Date
September 7, 2010
Inventor
Russell J Apfel
Austin
TX, US
D Matthew Landry
Austin
TX, US
Agent
R Michael Reed
Polansky & Associates P L L C
Assignee
Silicon Laboratories
TX, US
IPC
G06F 1/26
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