All that you need is an access point. The Technicolor Gateways are about the worse gateways out there. I run a Access Point that uses Power over Ethernet. It allows it to be placed anywhere that I can run Cat-5e to. As for that USB port. It is for those who wish to use USB for a Network connection.

If you look in my System Spec's and pictures, you will see that I run a separate Router behind my Gateway and then Access Points. Even before I got U-Verse, I was using a Arris 6412 modem, and the Cisco Firewall for handling everything.