Mbhydro:
The same scenario re: the POTS (copper) telco was going on here in NJ, but I cannot attest to the truth of that.
They (Fios) brought a fiber line to my house, and I still have the copper drop intact. It may have been 'cut' somewhere in the telco infrastructure, but it still is there. The tech connected the existing telco to the new fiber 'box' on the house side, checked all the lines & that was it for voice.
