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System employing signaling at a powered communications interface to modify or override a power-withholding policy at a power-sourcing equipment
System employing signaling at a powered communications interface to modify or override a power-withholding policy at a power-sourcing equipment
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机译:在供电通信接口上采用信令来修改或覆盖供电设备上的功率保留策略的系统
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摘要
A power-sourcing equipment (PSE) has a powered communications interface to which a powered device (PD) is coupled. The PD presents a valid PD signature indicating that the PD is attached and capable of receiving normal operating power from the PSE. Per a power-withholding policy, the PSE operates in a power-withholding state to withhold the normal operating power notwithstanding the valid PD signature, and monitors for a signal via the powered communications interface indicating that the normal operating power should be delivered to the PD. The signal may be an alternative signature generated by a user-activated switch for example. In response to receiving the signal in the power-withholding state, the PSE enters a power-providing state in which it provides the normal operating power to the PD notwithstanding the power-withholding policy. An intermediate device (dongle) may be employed to generate the signal.
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