Cherry's profile

New Contributor

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3 Messages

Monday, March 31st, 2014 6:51 AM

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Modem Resets and Stops Connecting

Hi,

I don't have anything to show on it, simply because I don't know how, but I have been having this problem for a while now. Every so often, (could be a week, could be a few minutes) my modem will just reset itself, cutting off my internet connection when I'm in the middle of doing something. Then, to make it worse, it won't connect again, the lights stopping and blinking on Send. The only way I can get it to start working again is if I disconnect the coax cable from the splitter that I use to hook up my TV and my modem. The TV works just fine with no interruptions or problems.

My modem is a Motorola SURFboard SB5101, issued from Cox. I connect my modem to a router via an ethernet cable. The router is a Cisco Wireless-G Broadband Router WRT54GS2 V1.

If there is more information you need, please ask.

Thank you!

Valued Contributor III

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4.2K Messages

11 years ago

Is it a SB5101U or just SB5101? If the latter, then that modem is very old and probably needs replacing soon no matter what. While your at it, upgrading to a DOCSIS 3.0 modem might not be a bad idea if its the same price or just a little more.

With that said, it sounds like the SB5101 is failing to connect on the upstream. Could be from a signal issue or a equipment problem. The fact that you have to disconnect and reconnect the cable cord to get the modem to connect is odd. Either way the modems signel levels should be telling. Here is a video on how to get them. Could you please post everything from the Signal page?

New Contributor

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3 Messages

11 years ago

The modem itself is just a SB5101.

Here is the information you have asked for.

Downstream Value
Frequency 855000000 Hz
Signal To Noise Ratio 36.0 dB
Power Level -1.2 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading



Upstream Value
Channel ID 2
Frequency 31200000 Hz
Power 54.0 dBmV

Valued Contributor III

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4.2K Messages

11 years ago

Your upstream power level is high. It should be below 50. Basically your modem is having to scream for Cox to hear it, and sometimes Cox cant, and that's when the send light blinks.

Now the question is what is causing your upstream power to be so high. Can you explain how the cable wire gets from the outside into the room the modem is in? Any splitters your can bypass your not using? Still not sure how the need for you to unscrew and reconnect the cable wire fits into all this.

Here is more info on what your cable signal levels should be. Feel free to ask any questions.

New Contributor

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3 Messages

11 years ago

I don't know the exact number, but there is quite a few. Later on in the day, I will try to connect a line straight to the modem from the closest point possible, and will let you know how it turns out. Thanks for the help, and I will get back to you by either tonight or tomorrow letting you know if it worked or not!

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