PoE Status bits. You should check the following PoE Status bits definition. [ Ox0F bits Status define ] 0x00 value : Disabled 0x01 value : Searching PD 0x02 value : Delivering Power(Class%d) to PD 0x03 value : Delivering Power with force 0x04 value : Fault 0x05 value : If get the bit, you should check more Fault bits at 0x70 bits. 0x06 value : Requesting Power(Class%d) by PD The others : Unknown error [ 0x70 bits Status define ] 0x00 value : Fault : Over Volatage Lock Out 0x10 value : Fault : Maintain Power Signature Absent 0x20 value : Fault : Short 0x30 value : Fault : Overload 0x40 value : Fault : Power Denied 0x50 value : Fault : Thermal Shutdown 0x60 value : Fault : Startup Failure 0x70 value : Fault : Under Volatage Lock Out