Rotated Grid, no problem. Just trying to save people as much time as possible and hopefully lead to a resolution. I'm still working on that part of it and will report back when done. I'm working with AT&T still at this point.

I can tell you at this point it's not the modems/routers (have tried 3 now), internal wiring, or the local loop. We're looking at a possible issue upstream, the other side of the local loop. (cable run from the central office)