Your noise margin is high but it is nothing to worry about.
You're on 80/20Mbps product, you are current'y synced at 80/20Mbps. See
6. Data rate: 19999 / 79995
The noise margin is set to target of 6. If your noise margin is above 6 this means your line has the room to improve on speed. Your line is in a connection where it is being capped by your CP (Communication Provider, ISP) due to the product/service you purchased off them.
You can see what the estimate is for those margins here with number 7.
7. Maximum data rate: 32440 / 94831 This is known as your attainable rates, though if you start seeing these decrease it will be due to Crosstalk due to the increase of FTTC subscribers.
Many thanks for the info. For the record I am around 25 metres from the cabinet. I am on the Infinity 2 package, giving me a max 76/19.
As a guestimate, with information from maps showing neighbours speed test results and some local knowledge, I'd say that FTTC is only just enabled from the cab and there are still a good few properties to be switched on as such, in the local corner of Edinburgh. So I will keep an eye on the attainable and update.
Edited by deleted (Sat 19-Oct-13 23:25:25)