Failed to detect a DSL signal NAD-3305D | AT&T Community Forums (2024)

The Problem:
I bought AT&T internet, and it worked fantastically for the first few months. Then about 2 weeks ago, my internet connection has started randomly dying (sometimes multiple times in the same afternoon) and I am given the message "Failed to detect a DSL signal NAD-3305D"

I tried calling AT&T's tech support line (1-800-288-2020) only to wait ~30 minutes and then be connected to "Bob" from India who can't speak a single word of English, nor is understandable in his speech.

I spent 45 minutes scouring Google and AT&T's site looking for some kind of "Live Chat" feature that has been mentioned in some Google results, however, after all that searching I realized that the live chat doesn't exist on AT&T's site (at least not anymore).

The only results I have found which is relevant to my problem is another AT&T forum post where nobody gave an actual answer, and instead postedYe Old Classic: "Have you tried turning it on and off again?" Intriguing stuff, I know.

The Not-Good-Enough Solution:

If I wait ~5 minutes OR restart my router (which also takes ~5 minutes to fully finish) then my internet connection works just fine.
However, I ain't spending 75$ a month on an unstable connection that can fail at literally any point in time. I already stopped using WOW! internet prior to AT&T because it was ungodly worse than my unstable AT&T connection I have now.

The Question(s):
How do I fix said error? The tech support number is useless, and this "AT&T Live Chat" doesn't exist.
Is the problem a hardware problem / is it AT&T's fault, or did I break something without even touching the router?

I only use a wired connection. It comes from the junction box outside into the basem*nt, up into my room's wall where AT&T installed a wall jack, then goes from said wall jack into my AT&T router and into my computer.

The router is elevated off of the ground.