Hi! I thought I'd post this as a conclusion, for whoever might come after me: I did redo the connections once again (well, twice again, actually) with different connectors, and eventually, I got it...

Hi @KJK No luck with the coupler (it was worth a shot, though). I'll make one last attempts with new connectors, and if that doesn't work, I'll probably just give up (until I have to reopen a wall,...

@Tedd404 @KJK Thanks for your replies. The cable I used is indeed solid copper AWG23, but Cat 7, not cat 6a, which I'd assume is an improvement. I did redo the connections, thinking as @Tedd404...

Dear all, I appear to have a problem connecting two SG2008P managed switches together over a 25m CAT7 cable (very similarly to what is described in here:...

Hi! Anyone with a suggested solution, please? I'm still blocked and can't figure it out... Thanks in advance, Benibis

@terziyski Thanks for your quick answer. First link is one of the examples I followed to create my switches setup, I do believe I got it all right (but feel free to point any mistake that I may have...