Auto-resetting span-power protection
First Claim
1. A method for deactivating a protective device, the method comprising:
- determining when an overload condition occurs on a communication medium;
when the overload condition occurs, deactivating at least one protective device by applying, for a first predetermined period of time, a short-circuit to an output of a power supply that provides a holding current to the at least one protective device; and
after the first predetermined period of time has elapsed, removing the short-circuit on the output of the power supply.
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Accused Products
Abstract
Systems and methods for auto-resetting span power protection are provided. In one embodiment, a method for deactivating a protective device is provided. The method comprises determining when an overload condition occurs on a communication medium; when the overload condition occurs, deactivating at least one protective device by applying, for a first predetermined period of time, a short-circuit to an output of a power supply that provides a holding current to the at least one protective device; and after the first predetermined period of time has elapsed, removing the short-circuit on the output of the power supply.
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Citations
23 Claims
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1. A method for deactivating a protective device, the method comprising:
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determining when an overload condition occurs on a communication medium;
when the overload condition occurs, deactivating at least one protective device by applying, for a first predetermined period of time, a short-circuit to an output of a power supply that provides a holding current to the at least one protective device; and
after the first predetermined period of time has elapsed, removing the short-circuit on the output of the power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A power interface for a network element having a power supply that produces an overload signal when an overload condition exists, the power interface comprising:
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means for generating a switching signal responsive to the overload signal; and
means for switching together a first output leg and a second output leg of the power supply, wherein the first output leg and the second output leg provide a holding current for one or more protective devices, the means for switching together responsive to the means for generating a switching signal;
wherein the means for switching together switches together the first output leg and the second output leg of the power supply for a first predetermined period of time in response to the switching signal. - View Dependent Claims (14, 15)
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16. A power interface for a network element, the power interface comprising:
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a shorting switch coupled across a first output and a second output of a power supply and adapted to apply a short-circuit across the first output and the second output when closed;
a switch controller coupled to the shorting switch and adapted to receive an overload signal from the power supply;
the switch controller further adapted to close the shorting switch coupled across the first output and the second output when the overload signal is asserted;
wherein when the overload signal is asserted, the switch controller is adapted to deactivate at least one protective device by closing the shorting switch for a first predetermined period of time. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification