That modem is a DPX100 and should really be replaced so another call to Tech Support is in order.
Open a browser and in the address bar put or click the link >
http://192.168.100.1/ the password and username are both root if required.
What I want you to post is the Downstream power levels including the SNR and the Upstream power levels for me thanks.
DO NOT POST YOUR MAC ADDRESS OR SERIAL NUMBER
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Check the frequency as well by clicking here
http://192.168.100.1/gscan.htm and if it looks like 331250000 then click the reset link below as it should be 331000000/339000000
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A Frequency fix for Scientific Atlanta DPX100 modems
Click the link and you will get a popup telling you " set successfully"
Close the message box and your modem will reboot and lock on to the correct frequency, this should help until your new modem turns up.
http://192.168.100.1/gscan.cgi?freq=0
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