you guys should check with TM and file a report if they dont give u a resolution. could it be your router, pc with p2p running on the background or pc infected with virus? check your task manager on the networking tab and see if theres any activity during idle. if all above does not apply then it might be problem with the phone line. just my experience, no other isp performance is better than TM in malaysia.

I have been monitoring this forum for the entire week, and now i would like to say something.
My office fixed ip line had a slowdown like all of you and i too believed that it was due to the capping. However, i continue to bombard the cs with calls because our company depend on download speeds to get our job done. After a few calls, there is no improvement, so i urged to speak with the higher ups.
I got the direct contact number of the team leader and he asked me to email him directly a couple of results for local and international link. Based on the results, he admit there is something wrong with my line and it is because one of their international node is faulty now. He came up with a solution for me while they repair the node which will take 1 week time.
And the solution he provided me works, but I am not suppose to announce it. Please try to push your matter to higher levels and maybe you might be able to solve your problem.