Thanks for your reading, too bad nobody had a solution...
This box is too much "prise de tete" for me, I sent it back and bought another brand (eedomus+, where each and every parameter of the FGBS is known and explained and easy to change without creating it, giving it's number & size. Really a nice box...).
I can not afford to spend hours on each device to connect.
Have fun nevertheless, sure a lot of things to do !
Yves