Hi everyone, 

After following a tip from another forum member and from TP Link support, I thought my problems would be solved but guess what, they are not!

So I keep getting my 3 Decos M4 dropping out the internet connection mostly in the night once every 4-5 days.

Setup is as follow:

VOO Belgium ISP Modem -- Cable to DECO 1 -- Cable from DECO 1 to SWITCH -- Cables from SWITCH to DECO 2 & DECO 3 + 2x PCs (4 Ethernet outputs in total out of the SWITCH).

This is a so called Star Network from what I have been told to do. My network is in Router Mode. DECOS are in Ethernet backhaul.

I phoned TP Link in the Netherlands, they were very rude, a guy with a really strong Deutch accent put the blame on my ISP (VOO Belgium) which is not the case as everything works on that side (I tried with a cable to check connection while Deco went off). He then started to yell at me. I think @tplink has to remember that we are the customers here. 

So anyone has an idea on how to fix this unstability? 

Thank you.