Lately, I've been having disconnections and I've lost my phone line signal... There's no tone at all... I just checked my SNR margin and I was surprised to see a drop in performance...

Up Stream
512Kbps

Down Stream
1024Kbps

Operation Data
Noise Margin
8 dB (Up)
15 dB (Down)

Attenuation
32 dB

It used to much better... Could someone advice me on this???