I'm helping a friend set up a new router but he has run into a few complications that i don't really know a solution to. He has borrowed my old router which is a TP-Link Archer C7, which is an upgrade from his previous Technicolor TC8305C. The problem is the technicolor is a modem/router and the new router does not have a coax connector on it. I haven't been to his house to see for myself but from what i understand a coax cable is coming into his house going to a DTA (hd-dta100u) then to the technicolor modem/router. I was trying to find out what he would need to get the new router up an going.