first in this it looks like even though you can access 20mbps speed the speed set to your line is 4mbps only.
the maximum upload limit one can get is 1mbps so its ok.usually when download rate is reduced the upload rate is also reduced at the same time that istrange. i also noticed downstream snr rate is excellent but upstream rate is low. i assume you are staying close to your exchange as your attenuation rate is low.
once things get cleared ask for an increase in speed .
here is my status for now
Downstream Upstream
SNR Margin (dB):8.3 20.8
Attenuation (dB):50.5 28.9
Attainable Rate (Kbps):6061 1121
Rate (Kbps):4998 621
the maximum upload limit one can get is 1mbps so its ok.usually when download rate is reduced the upload rate is also reduced at the same time that istrange. i also noticed downstream snr rate is excellent but upstream rate is low. i assume you are staying close to your exchange as your attenuation rate is low.
once things get cleared ask for an increase in speed .
here is my status for now
Downstream Upstream
SNR Margin (dB):8.3 20.8
Attenuation (dB):50.5 28.9
Attainable Rate (Kbps):6061 1121
Rate (Kbps):4998 621