According to the manual (English completely) LED indicator for so many, speed is also there. Normal occurrence in devices of this type (D-Link 1005D), the LED blinks orange or green. Well, unfortunately, was not the case and then another unlabeled network cable the perfect looking for a needle in a haystack go.
Therefore, back and rather spend 2-3 euros more. Then the little problems was found in 2min. Not my first TP-Link "I want to save" mistake. Shame