Electrical computers and digital processing systems: support – Computer power control
Reexamination Certificate
2005-10-19
2010-12-21
Tran, Vincent T (Department: 2115)
Electrical computers and digital processing systems: support
Computer power control
C709S220000, C324S600000, C324S607000
Reexamination Certificate
active
07856561
ABSTRACT:
Novel system and methodology for detecting a Powered Device (PD) in a Power over Ethernet (PoE) system. A PD probing circuit generates a detection signal supplied to the PD and determines a PD response signal produced in response to the detection signal. Based on the PD response signal, the control circuit determines a detection value for identifying the PD. In particular, the control circuit concludes that the PD is a device satisfying a PoE standard if the detection value is in a first predetermined range, and concludes that the PD is a legacy PD device if the detection value is in a second predetermined range outside of the first predetermined range.
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Heath Jeffrey Lynn
Stineman, Jr. John Arthur
Linear Technology Corporation
McDermott Will & Emery LLP
Tran Vincent T
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