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802.3 af and at 802.3, PSE in addition to detect resistance when detecting PD detection capacitance,
Time：09-18
Such as: Af in 802.3 and 802.3 at agreement, PSE to detect when detecting PD resistance and capacitance, resistance can be detected by two points to obtain the voltage and current, so could you tell me how to detect the capacitance is?
