adanf A quanto disti dal cabinet (o dalla centrale)?
la negoziazione dell'Annex M potrebbe quindi dipendere dalla distanza dal DSLAM ?
https://en.wikipedia.org/wiki/G.992.5_Annex_M
Annex M is an optional specification in ITU-T recommendations G.992.3 (ADSL2) and G.992.5 (ADSL2+), also referred to as ADSL2 M and ADSL2+ M. This specification extends the capability of commonly deployed Annex A by more than doubling the number of upstream bits. The data rates can be as high as 12 or 24 Mbit/s downstream and 3 Mbit/s upstream depending on the distance from the DSLAM to the customer's premises.
