Gentlemen - Thank you for your responses. I thought I knew T1 really well but, I have to admit, I am not too familiar with some of this.
We have a Sunrise T10 Tester so I should be able to insert the tester into the circuit in bridge mode and make some of these observations myself yes?
In what I am hoping is the simple fix, I am going to try replacing the unit just to see. If the new unit works (which I honestly don't expect), then I can bring the gateway back to our shop and tinker with it there.
Thank you again and, anything you can offer to further advance my knowledge, is appreciated!
Mike
