Had it for years on 1mbps, fed up downgrade to 512K oso same, then kanot tahan keep complaining thru email .
the tech that came said it was my house wiring problem, bla bla, ding dong ding dong. Then I climbed up roof disconnect and pull down incoming telephone cable with the modem outside my house oso same.

finally tm HQ helpdesk asked them to change my port(dslam) to nearer to my house. problem solved, upgraded to 4mbps. happy ever after.

Now SNR >30db liao.

then do what I did, connect incoming direct to ur modem with a short cable to find out. just dun fall down when climb up high..