Re: not round here
VDSL and FTTC makes no difference to the copper run to the exchange. Apart from passing through a low-pass filter at the cabinet, there's no difference. Indeed, if you had ADSL before, the line would have passed through a similar low-pass filter at the exchange. (Plus a similar low-pass filter in your house). Unless there was a poor connection made at the green box, then I can's see why there would have been any difference to call quality at all.