No internet from Ethernet wall outlets
5 or 6 yrs ago I switched to AT&T for my cable TV & internet. The guy who did the installation altered some cables in my panel such that my cable box was plugged in to the ethernet outlet instead of the usual coax outlet. I've since switched back to Cox and I want to use that ethernet outlet for my Apple Tv. However, when I connect the ethernet cable, my Apple Tv is showing no internet connection. I'd appreciate any help/guidance. Thanks.