Pin Name Description Information1 Tx+Rx/Tx might be swapped(Auto-MDIX)+/- might be swapped(Autom. polarity correction)PoE might also be injected via Rx/Tx lines2 TX-3 RX+4 SPARE 1 Power Supply (PoE)156 RX-7 SPARE 2 Power Supply (PoE)18Header: RJ451 411PRODUCT MANUALSANTARO core6. Internal and External Interfaces6.1 Ethernet (X24)Green LED (link) is default off and turns on when link is detected.Yellow LED (act) flashes during sending/receiving packets.1 Optional