I upgraded from ADSL to FTTC three weeks ago, on BT's Infinity 2 80/20 service, and was provided with a HH5 and no Openreach modem. I'm about 125m away from the cabinet, and the hub is reporting the maximum data rate as being well above the data rate I'm configured to receive.
The strange thing is that over the three week period, the noise margin (and so the maximum data rate) has been slowly dropping. The downstream margin started at 17.6 on the day of go-live (max. data rate 121370), and drops by about 0.2 a day -- no major drops, but little drops day by day.
24 Feb - 17.6 (max attainable 112613)
27 Feb - 15.1
03 Mar - 15.0
06 Mar - 14.4
08 Mar - 13.9
13 Mar - 12.9 (max attainable 105583)
It seems strange that the noise margin is dropping over time - is this normal? I'd think the noise of the line would stay fairly consistent over time.