I spent this morning with a BT engineer looking for the cause of >100 apartments with poor Broadband speed. We identified the culprit as a Compact Line SIG 8008 on the 14th floor.
With power on to the 8008 the flats get ~880K speed, with power off to it they get 5Mb.
Is this likely to be just a faulty 8008 and a straight swap (or a swap for something similar) or should I now just pass this on to a pro in aerials?