I originaly thought it was time related but have since seen it happen at all hours.

By AFC do you mean a terminal that is remote from the CO and provides POTS service, if so the answer is yes.It's located about 3000 feet from our building part underground. I do not know what feeds it but assumed it was Fiber, What is AFC?

But some lines are direct copper from the CO about 3 miles away and we have the same problem with them also. It does not seem to mater if the line is 48 volts tip to ring or 37, or have the tip almost at ground or at 8 volts. I cannot find a pattern.

Avaya still wants us to call Verizon and tell them the lines are bad but Avaya has not told us what to tell Verizon is wrong with them.

I already know what verizon's answer will be already "no trouble found"

Since seting the lnes to Loop Start from ICLID the problem has gone away but so has our Caller ID.