Microsemi Corp-analog Mixed Signal Group, Ltd.

Powerdsine, Ltd.

Microsemi Corp. - Analoged Mixed Signal Group Ltd

Dan Admon

Alon Zeev Ferentz

Yair Darshan

Roni Blaut

Yossi Shanava

Poldi Rimboim

Shimon Elkayam

Ezra Koper

A method for communicating settable priority data from a powered device being powered over communication cabling to power sourcing equipment, the method comprising: prior to connecting power to operational circuitry of the powered device, transmitting first multi-bit data from the powered device to the power sourcing equipment; subsequent to the transmitted first multi-bit data, connecting power received over the communication cabling to the powered device operational circuitry; receiving information from the powered device operational circuitry; disconnecting the received power from the powered device operational circuitry; and subsequent to the disconnecting, and prior to reconnecting power to the operational circuitry, transmitting second multi-bit data from the powered device to the power sourcing equipment, the second multi-bit data being a function of the received information, at least one of the first multi-bit data and the second multi-bit data being a function of a settable priority.

Powered device with priority indicator

A method of determining an effective resistance between a power sourcing equipment and a powered device, the powered device exhibiting an interface and an operational circuitry, the method comprising: prior to connecting power to the operational circuitry of the powered device, impressing two disparate current flow levels (I, I) between the power sourcing equipment and the powered device; measuring the voltage at the powered device interface (V, V) responsive to each of the impressed disparate current levels; measuring the voltage at the power sourcing equipment (V, V) responsive to each of the impressed disparate current levels; and determining the effective resistance between the power sourcing equipment and the powered device responsive to the V, V, V, V, Iand 1.

Determination of effective resistance between a power sourcing equipment and a powered device

A method for communicating multi-bit data from a powered device being powered over communication cabling to power sourcing equipment, the method comprising: exhibiting a signature indicative of a device to be powered over communication cabling; sensing a voltage level indicative of remote powering over communication cabling; prior to connecting power to operational circuitry, transmitting first multi-bit information; subsequently to the transmitting first multi-bit information, connecting power received over the communication cabling to the operational circuitry; receiving information from the operational circuitry; subsequent to receiving the information disconnecting the received power from the operational circuitry; subsequent to the disconnecting, transmitting second multi-bit information associated with the operational circuitry, the second multi-bit information comprising at least one bit being a function of the received information; and re-connecting power received over the communication cabling to the operational circuitry.

Powered device interface circuit

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Kiryat Tivon, Israel

Dan Admon