Internet issues with Netgear C3700-100NAS

Hello, and thanks for the information.

I got a new coaxial cable and now it looks like this. Is this better? what supposed to be normal or acceptable?

Thanks @BruceW ! So far everything is working fine. 

I'm planing on getting this modem SURFboard® SB8200 DOCSIS® 3.1 Gigabit Cable Modem. 

I get this upgrade should be ok?

Oh and here is the log:

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@jodarove wrote: ... Is this better? what supposed to be normal or acceptable? ...

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Yes, the signals the modem is reporting and improved and now withing spec, but please note that, if this is still the C3700-100NAS on a 300 Mbps plan, that combination is not one that Comcast approves.

The allowable signal level ranges (some of which cannot be read at the modem) are available at Internet Troubleshooting Tips previously linked.

Are you still having problems? If so, please post the modem's error log.

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@jodarove wrote: ... So far everything is working fine. ...

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Good to hear!

Quite a few posters here who upgraded to DOCSIS 3.1 modems capable of Gigabit service have reported an odd problem: all the modem's signal specs look good, but the modem experiences a lot of unexpected and unexplained dropouts. There's no way to know if that will happen to you except by trying it.

Not sure what to make of the error log you posted. The entries may represent a normal startup. I'd suggest keeping an eye on it to see what new entries appear.

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@jodarove wrote: ... I will update this when I get the new modem.

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Please do! We always like to hear how these thing turn out.

Thanks again @BruceW! I will update this when I get the new modem.

Hi @BruceW 

Hope you are doing well.

My problem is just getting worse. I did not upgrade yet my modem.

I check the connections outside my apartment.  

First pic: the cable is coming through neighborhs backyard and you can see in the pic that have that union there.

https://ibb.co/gMwvG1M

Second pic: Is the splitter.  In line goes to the landord house and the other one goes to my apt the basement.

https://ibb.co/8Y9rSdF

that line that it goes to my aparment go to a wall plate and from there to my router.

I dont think that little union (on the first pic)  is very helpful to my connection. 

Update: Technician is coming tomorrow to check out the connections. I will update after that.

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@jodarove wrote: Update: Technician is coming tomorrow to check out the connections. ...

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That's probably best. Unless there is obvious damage, it just isn't possible to evaluate the RF performance of coax cable, splitters, or connectors without special equipment.

Good luck!

Update

The technician came. He tested the connection with a modem and an app on his phone. He connected his modem to the cable before the splitter. Then he told me that the connections was good and that on his app show that I have 4 bars and that normally other people only has 3 bars.( I have no idea what he means about that)

I came to my laptop to check out the SNR, power, etc. and show to him, but he has no clue about any of this ( I was shocked.) but any ways so far is working.

My modem has been up for: 1 day 04:53:41 and this is how the numbers looks like:

And I have no new event logs.

Now that I'm posting this I realized that the SNRs in the channels, 6, 7 & 8 are fluctuating betweeen 41 to 33 dB.

Thanks for reading. 

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@jodarove wrote: ... I came to my laptop to check out the SNR, power, etc. and show to him, but he has no clue about any of this ...

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Wow. I hope that it continues to work for you, but if it was me, I'd insist that they send out another tech, preferably one who has a basic understanding of cable Internet signals.