Patent ID: 7915764
Filing Date: 2011-03-29
Classification: H04L

Abstract:
1. Relay circuitry that operates in a first state when power is not supplied by power-sourcing equipment to the circuitry and in second state when power is supplied by the power-sourcing equipment to the circuitry, the relay circuitry comprising: a first circuit for causing the relay circuitry to be placed in the first state when power is not supplied by the power-sourcing equipment to the relay circuitry, wherein the first circuit is operative to store charge from input signals to the relay circuitry when the input signals are of a first value, and to use the stored charge to maintain the relay circuitry in the first state; and switching circuitry that is operative to switch the relay circuitry from the first state to the second state when power is supplied by the power-sourcing equipment to the relay circuitry.