Reset device and method of power over Ethernet system
First Claim
1. A reset device used in a Power over Ethernet system comprising:
- a power terminal electrically coupled to an Ethernet transmission line that transmits an electric power signal having a power level from a power source to a powered device; and
a reset circuit electrically coupled between the power terminal and a ground terminal, wherein the reset circuit comprises;
a fixed terminal configured to receive a fixed voltage;
a resistive circuit electrically coupled between the fixed terminal and the ground terminal; and
a variable resistive circuit electrically coupled between the power terminal and the fixed terminal;
wherein the variable resistive circuit is configured to receive a control signal to vary a resistive value thereof to vary a voltage level of the electric power signal from the power level to a non-zero reset level;
wherein upon receiving the control signal, the reset circuit is configured to vary the voltage level of the electric power signal from the power level to the non-zero reset level for a predetermined time period to reset the powered device.
1 Assignment
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Accused Products
Abstract
A Power over Ethernet (PoE) system that includes a power source, an Ethernet transmission line, a powered device and a reset device is provided. The power source is configured to generate an electric power signal having a power level. The powered device is configured to receive the electric power signal through the Ethernet transmission line. The reset device includes a power terminal and a reset circuit. The power terminal is electrically coupled to the Ethernet transmission line. The reset circuit is electrically coupled between the power terminal and a ground terminal. Upon receiving a control signal, the reset circuit is configured to vary a voltage level of the electric power signal from the power level to a non-zero reset level for a predetermined time period to reset the powered device.
8 Citations
15 Claims
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1. A reset device used in a Power over Ethernet system comprising:
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a power terminal electrically coupled to an Ethernet transmission line that transmits an electric power signal having a power level from a power source to a powered device; and a reset circuit electrically coupled between the power terminal and a ground terminal, wherein the reset circuit comprises; a fixed terminal configured to receive a fixed voltage; a resistive circuit electrically coupled between the fixed terminal and the ground terminal; and a variable resistive circuit electrically coupled between the power terminal and the fixed terminal; wherein the variable resistive circuit is configured to receive a control signal to vary a resistive value thereof to vary a voltage level of the electric power signal from the power level to a non-zero reset level; wherein upon receiving the control signal, the reset circuit is configured to vary the voltage level of the electric power signal from the power level to the non-zero reset level for a predetermined time period to reset the powered device. - View Dependent Claims (2, 3, 4)
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5. A Power over Ethernet system comprising:
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a power source configured to generate an electric power signal having a power level; an Ethernet transmission line; a powered device configured to receive the electric power signal through the Ethernet transmission line; and a reset device comprising; a power terminal electrically coupled to the Ethernet transmission line; and a reset circuit electrically coupled between the power terminal and a ground terminal, wherein the reset circuit comprises; a fixed terminal configured to receive a fixed voltage; a resistive circuit electrically coupled between the fixed terminal and the ground terminal; and a variable resistive circuit electrically coupled between the power terminal and the fixed terminal; wherein the variable resistive circuit is configured to receive a control signal to vary a resistive value thereof to vary a voltage level of the electric power signal from the power level to a non-zero reset level; wherein upon receiving the control signal, the reset circuit is configured to vary the voltage level of the electric power signal from the power level to the non-zero reset level for a predetermined time period to reset the powered device. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A reset method used in a Power over Ethernet system to reset a powered device thereof comprising:
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generating an electric power signal having a power level by a power source of the Power over Ethernet system; receiving the electric power signal through an Ethernet transmission line by the powered device; receiving a control signal by a reset circuit of a reset device of the Power over Ethernet system, wherein the reset circuit is electrically coupled between a power terminal and a ground terminal, and the power terminal is electrically coupled to the Ethernet transmission line; and varying a voltage level of the electric power signal from the power level to a non-zero reset level for a predetermined time period to reset the powered device by the reset circuit, wherein the reset circuit comprises a fixed terminal configured to receive a fixed voltage, a resistive circuit electrically coupled between the fixed terminal and the ground terminal and a variable resistive circuit electrically coupled between the power terminal and the fixed terminal, the reset method further comprises; receiving the control signal to vary a resistive value thereof to vary the voltage level of the electric power signal from the power level to the non-zero reset level. - View Dependent Claims (12, 13, 14, 15)
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Specification