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Modem keeps losing connection

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Message 1 of 13
6,119 Views

For the last week my modem has been losing it's connection about every 15 to 20 minutes.  Do I need a new modem?  I've rebooted everything several times.  I've unplugged everything.  I have wireless, so I disconnected the router and ran modem straight to the computer but I still have the same issue.

12 REPLIES
Posted by
Connection Expert

Message 2 of 13
6,088 Views

What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.




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Message 3 of 13
6,042 Views

When I click on your link http://192.168.100.1 I get "Internet Explore cannot display the webpage"

Posted by
Connection Expert

Message 4 of 13
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Posted by
Connection Expert

Message 5 of 13
6,030 Views

What is the exact make and model number of your modem / device ?




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Message 6 of 13
6,011 Views

It is a Motorola Model Number SB5120

Posted by
Connection Expert

Message 7 of 13
5,998 Views

That address is the correct one. Be advised that the modem may need to actually be in "sync mode" with the Comcast system (the "Online" light solidly lit) in order to access the user interface.




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Message 8 of 13
5,993 Views

Strange, the online light is on solid but I am still unable to access the link to get the stats for you.  I've tried typing in the address, and I've tried just clicking on your link.  You think I should place a service call and have someone out to check everything out?

Posted by
Connection Expert

Message 9 of 13
5,974 Views

Have you tried powercycling it ?




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Message 10 of 13
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I hate to sound dumb, but what is powercycling?

Posted by
Connection Expert

Message 11 of 13
5,960 Views

Unplug all connecting cables and wait 3-5 minutes. Then re-connect everything and give it the time it needs to re-sync with Comcast. Any difference ? If not, perhaps the modem has a hardware malfunction..




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Message 12 of 13
3,928 Views

I had the same problem, tried everything, even had comcast reset modem. Later found out   I had a bad telephone causing the problem. Changed phone and everything works fine.

Posted by
Connection Expert

Message 13 of 13
3,923 Views

Year old thread now closed.




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