I have no idea actually. Ive got a BT engineer coming out tomorrow though via Eclipse, my line attenuation is 60/61db with a 6/7db noise margin generally, its frustrating to use and unacceptable.
Youre right at the arse end of where your broadband is gonna work, but ask to be put on the best pair on the E and D side with an RF3 filter and NTE2000.