Dear Daniele, thanks for the note.
I called the technical service as per suggestions and they have been really super efficient in sending a second router. It is a Sagecomm again but that fits in the cabinet.
However, whilst the initial Internet Box 2 is connected to the first of the two OTO fiber ports, this new one works only when connected to the second port. The unexpected result is however that from an internet speed close to 600/700 mbps of the original Intenet Box, the new Sagecomm works only at 100 mbps or less.
If I try to connect the new Sagecomm router to the first port of my fiber, it simply does not work.
Right now I have basically the choice between one connection that is fast with a box too big and one connection that is slow but fits in the cabinet. Is this normal or is there something that I am missing? Would the Zyxel router be maybe a better solution?
Thanks for your help.