Hello, 

I will switch from Ziggo to KPN internet and TV at end of this month. There is optical fiber available in my house. But if I look at the installation guide of KPN, there is a NT box required to complete installation, and I didn't find it in my house. Does someone know whether one of the boxes in below picture are NT box, or I have to make an appointment with KPN technician to install it?
 

This picture includes all equipments related to internet in my house. 
 

And there is a box with KPN label:

If you know the answer, please let me know, Thanks a lot!