Patent attributes
A Power Over Ethernet (PoE) system includes Power Sourcing Equipment (PSE) providing data and voltage over Ethernet wires to a Powered Device (PD). Instead of the conventional detection and classification routine being performed every time the system is powered up, the pertinent data to determine whether to apply PoE to the PD is stored in a memory in the PSE. The memory is accessed by a controller in the PSE when the PSE is powered up. Therefore, a time-consuming detection and classification routine does not have to be performed each time the system is powered up. The system is particularly useful in automobiles where the particular PDs and PSEs are predetermined. The PoE data may be obtained the first time the system is powered up or may be stored in the memory when the PSE is designed or fabricated.
