Can I Add a Hub After the ONT 1-211M-L but before the Verizon router

Hello,

I have my ethernet, cable tv and home phone through Verizon Fios.  All is working great!

I have an ONT 1-211M-L in the attic, and a Verizon router in the office.

In the back of the 1-211M-L I have a data port that goes to the other end of the house to the Verizon router in my office.  I also have a new ethernet cable that is terminated near the ONT in the attic. 

Question:  Can I interrupt the cable connection to the OTN and place it through a 4 port ethernet hub in the attic so that I can connect the new ethernet cable and still keep the connection going to the router?  Thanks for checking.