Cable length from Smart Jack to Box is about 25'.

XO replaced the repeater on the line and I've been running fine since. Not 100% sure why a repeated would cause the D-Channel to hang-up either. I guess if things are working then i'm content in not knowing why, atleast this time.

I'm still getting BPV's on the line but I just haven't been in that area to reset the card and reterminate the cable.