I had this same problem - I wanted my "network center" to be in my office at the front of the house on the upstairs floor.

I eventually gave up thinking of having so much fiber optic going through the house, as the fiber optic in my area enters from the back of the house.

What I did was have the fiber optic cable enter into the wet kitchen. Then I design one small storage area there to keep just the optical network unit. Then from the storage area, I pulled 1 x CAT6 hidden in the wall to my office. So the router will be placed in my office. Optical modem and router not in one location, but joined by one long ass network cable embedded in the wall. As for the fiber optic phone line, I also put one phone socket in the area where the optical modem is, and this goes to my living room downstairs, where I'll place the cordless phone.