Modem: Aztech DSL600EU
Us Rate: 512
Ds Rate: 608
US Margin: 20
DS Margin: 2
Modulation: MMODE
LOS Errors: 1
DS Line Attenuation: 46
US Line Attenuation: 50
Path Mode: Fast Path

I have facing frequent disconnection problem, plus the time taken for loading website is too long (although modem is connected) . My streamyx package is 512k. So, i wonder is my phone line problem or my modem problem. Anyone can give me some guideline?
Thanks.