Switch with fully isolated power sourcing equipment control
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United States of America Patent
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Mar 23, 2010
Grant Date -
Jan 25, 2007
app pub date -
Mar 6, 2006
filing date -
Jul 21, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
In one embodiment, the invention is an apparatus (e.g., an Ethernet switch) having an isolated side and a line side. A line-side connector is connectable to a cable. An isolated-side physical-layer module (1) is electrically coupled to the connector via a signal-isolation transformer and (2) processes signals transmitted over the cable. A line-side power conditioning module (1) is electrically coupled to an isolated-side power switcher via a power-isolation transformer that converts an AC power signal received from the power switcher into a transformed AC power signal and (2) converts the transformed AC power signal into a cable power signal to be supplied via the connector to the cable in order to power a cable-powered device connected to the cable. An isolated-side control module performs a detection function in which the control module determines whether or not a cable-powered device is connected to the cable.
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