Transmission impedance for four-pair midspan powering in a...

Details Transmission impedance for four-pair midspan powering in a... Transmission impedance for four-pair midspan powering in a...

2011-07-05

2011-07-05

Wang, Albert (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

C710S062000

Reexamination Certificate

active

07975153

ABSTRACT:
A midspan power sourcing equipment (PSE) for operation with power over Ethernet (PoE). The midspan PSE provides powering over wire pairs that are also used for data communication. To ensure compatibility with legacy Ethernet devices, the ports used for transmission of data are designed with a low effective impedance at a frequency of operation.

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David Law and Wael William Diab, “100BASE-T normative 350uH inductance specification and IEEE P802.3at,” IEEE P802.3at DTE Power Enhancements Task Force, Jul. 16-19, 2007.

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