I bought my Cisco 857 a week ago. I am using 128 Kbps ADSL. It provides about 96 Kbps download for about 2 hours and then the speed drops to zero. Then I turn its switch off for about one minute and then I put it on. Again it provides 96 Kbps download and after 2 hours the speed drops again to zero. This problem still did not stop. Anyone pleas advise.