A simple check to see if you are getting a signal from the carrier is to put a bare LED across the pair. It'll light on the TX pair coming in from the CO.
That won't tell you anything about the RX side, but it's a quick/easy test.
Kind of hard to fake a T-1 tester. Nice thing is, they are getting cheap on the used market. Used to be they were several thousand dollars or more (way more) for a T-Berd type tester. But now that most are retiring T-1's and PRI's, the testers are showing up on the used market dirt cheap.
I've still got my old T-Com (long since out of business) tester that I bought probably 20 years ago. Still works...
I'd search e-Bay for a used tester with a return option. I bet you can find one pretty cheap. We used T-Berds at work and a few Sunrise hand held models.
In my previous life, I did CATV and our test equipment wasn’t universal in the way of just tossing into a system. Channel plans needed to be built , sweep points and frequencies for the telemetry needed to be entered for the specific system and the MAC address of the meter needed added to the CMTS to be able to do a docsis test. Now the newer equipment would auto build channel plans etc, but you were talking 10’s of thousands of dollars.
With a T-Berd or other test unit, are their specific parameters that would need to be entered into the machine based on the provider?
It’s an older system I’m working in, and will be moving to upgrades in the next few years, but in the meantime, I don’t want to rely on guessing it’s a telecom issue as it could take time for them To”dispatch”