Power over Ethernet (registered trademark) detection of legacy powered device in the system

摘要

To provide a methodology and system for novel detection (PD) is powered device Power over Ethernet (registered trademark) in (PoE) system. PD probe circuit determines a PD response signal and generating a detection signal supplied to the PD, is generated in response to the detection signal. Based on the PD response signal, the control circuit determines the detected value to determine the PD. In particular, the control circuit, a second range outside the first predetermined concluded that is a device PD satisfies the PoE standard if there in a predetermined range of the first detected value, the detected value conclude PD is the legacy PD device if it is in a predetermined range of.