I would think if it where cross talk I would hear it on the amplified butt set I have bridging the line and see some AC on the line, I hear and see nothing.

The thing that concerns me most with the lines is that some are not Tip Grounded and have 7 to 8 volts to ground where others are within .25 volts of ground

As I said, Avaia wants me to call Verizon but what do I tell them? The lines work fine with a Butt set the Comdial and a 2500 set. I know where this is going already and it's a bad feeling.