Thanks for your answer, but the deco x60 I am using is on the unit just above the television, I tried it with the cat6 network cable, unfortunately it gave the same negative result.

Hello, I bought it as Deco x60(2.pack) and it is installed as software on it (Deco X60(EU)_V2_1.5.1_20210204) I use one of this device as a router on the fiber internet side where I get service from...