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Originally posted by FdTech:
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.
AFC stands for "Advanced Fiber Communications" most phone co. use this to extend our reach when the old cable started to deteriorate. What they might have done, is plow fiber to the cabinet and put an “AFC” shelf in place.
Is this issue happening on just 18 line, all the same every time or 18 at a time and different lines?
What I think might be an issue is this (and it happened to me) when using an AFC shelf to extend POTS line, if you are using T1AX’s cards you should run R-POTS cards. I think that this shelf might be having a “timing issue” with the T1AX card.

If they are running GR303 to that cabinet for POTS they NEED 2 DPL cards for your EOC & TMC channels. (two are need to for active and secondary again this would indicate a timing issue.)

Just a thought, but if you have 25 line why not have a T? I’m sure you would be able to cut cost by doing that.