[SmartMart]

I'm interested but unfortunately there's nothing I can do about it apart from offer advice. I had a similar issue a while ago and, just by pure chance, I found the cause of the problem: I discovered that the white cable running from the modem to the splitter was running parallel to a mains cable. Not only was it running parallel, it was touching for several feet. Once I moved the power cable away, the problem disappeared. In my case, it would appear that the modem cable was picking up interference (noise) from the power cable. Perhaps you should have a close look at all your cables.

Regards