Ihave a at& t router and a 1000mbs ethernet cable connecting from that to my net gear r7000 that can push +1000mbs. the cable hooking from the at& t router to the dsl separating cord(i think that's its name .it has one input and two out puts. one being used for the internet.) and my internet speed is less then 25 mbs . what do i change out to get rid of the bottle neck? the netgear is all set up and has a good ethernet cord. 40$ cord