attenuation

i have bsnl uld 850 plan but from 2 days my dsl is blinking constantly plz tell me is modem problem or line problem i post snr value snr value is 18.5 (downstream) and 18.1 (upstream) signal attenuation 41.3 (downstream) and 27.4 (upstream) loop attenuation 41.3 (downstream) and 27.6...