Let me start by saying, if this post should be in a different category, mods- feel free to move it. I didn't see anywhere it really belonged, and it's borderline within the scope of these forums anyway...

As many of you know, I do the maintenance for a local bar. This is the site where the trouble is.

About a month or so ago, when we had our internet service from Consolidated un-suspended, we started having all kinds of issues with the DSL. Prior to the human-malware shutting down the world, this connection was relatively trouble free for the better part of a year. When the bar was forced to close, we put the internet on suspension (They shut it down, charge you a little under half price, and with a phone call it's back on in a day... in theory)

Like I said, before the plague hit, this thing worked almost flawlessly for a year.

After we reopened, the thing is down almost every day.

When I say "down" this may be an important clue... The two circuits stay synced up. The lights on the modem for DSL1 and DSL2 stay orange (meaning vdsl, as green means adsl) The "internet" light goes out and we have zero connectivity to the public internet. The LAN seems to stay up, but whoopee do...

The details:
40/10 Bonded VDSL, 2 "dry loops" ; I put dry in quotes because Consolidated actually puts battery on the pairs and a repeating message telling you the circuit phone number (To help prevent people cutting wires they think are dead, and damn handy too)
Nothing on our side had changed; same network topology, same router/modem, same connected devices, same everything. It was like a 4 month time capsule.

First service call:
Tech finds a couple bad pins on a 66 block and a bad "A" side, since it was basically operating on 1/2 a pair. When he left, pairs were good, system stayed up a day and a half... then kaput
I go to the cellar and check everything. Decide I don't like the looks of some of the pins on the blocks and swap us over to some new pairs in the house cable. Line sounds clean, modem syncs up, works for 2 days, kaput.

Second service call:
This tech was about as useless as they come. Because it was working correctly when he showed up, he wouldn't do anything. Except talk, and talk is cheap. He explained it seems like a loss of rout, not sync (duh) but because it was working, NTF.
If stupid customer service didn't have me reboot it as the first part of the call, it would still be out.... Then again, I can't run a bar with no internet, so either way I HAVE TO REBOOT THE GODFORSAKEN THING.

Third service call:
This tech is a cool dude... He is quite done with the company getting angry calls from me about my modem being down. He goes to the basement, tests the pairs in the terminal back to the CO with his sidekick, they look good. Goes to the bar office, checks the pairs at the jack. They seem perfect. He takes the modem, tosses it in the trash and installs a new one, new phone cord and all. Goes back to the CO, puts us on a different port on the OCCAM blade DSLAM, comes back out, runs some tests, declares us all good and leaves. Quite thorough, and more so than I've come to expect from CCI employees. 2 days later it's down again. A day after that it's down again.... and so on, and so on...

Every time its the same condition. Modem appears to be still synced up, but no routing. DSL lights are on solid, internet light is out. Reboot and it all comes back to life till it does it again.

Aside from bailing and going to the competition, anyone have any clues what the problem could be?

Tech #2 was convinced I have "too much on the network". I call BS, but sure... There's a tablet for a POS terminal, a Roku for the TV, and a laptop in the DJ booth. We also have a camera system which he was CONVINCED was the problem, so I pulled the ethernet cord out of it and the thing continues to crash. So, sorry try again. It uses about 1.5 Mbps upload and about nothing for download... so not even close to taxing the connection. And for the previous year it was connected and never had an issue.

I've tried isolating everything on the network, and nothing seems to be a cause. Any ides would be greatly appreciated.
Thanks

Chris