(E, D, P) Three levels, the default state is "OFF", the function description is as follows after "ON" is turned on E is the "ON" state, port 9-16/17-24 can support long-distance transmission 10M/250m and VLAN transmission mode; when "OFF", 100 meters transmission. D is the "ON" state, port 1-16/1-24 can support AI self-healing mode; when "OFF", no communication self-healing function. P is the "ON" state, POE outputs total power and priority indication mode; when "OFF", no power indication function.