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Re: 95% drop in internet speed happening since few days.

Contributor

Re: 95% drop in internet speed happening since few days.

We are having the exact same issues. Speeds were once awesome, and now they're cripplingly bad. I've replaced the router and modem, and the issue persists. SNRs are an average of 30 with lowest at 24.9 and highest at 36.2. Power is a little lower than I'd like. It's all below -15dBmV.

 

We have a guy coming out tomorrow morning to take a look, but I'm a bit annoyed by this. It was working fine, and then suddenly on Sunday it took a dump. Comcast claims there's nothing wrong, but this is someone else with the same issues. I'm paying them a lot of money per month for no data cap and fast speeds to be able to stream 4k content. This is not a good experience.

Diamond Problem Solver

Re: 95% drop in internet speed happening since few days.

Sounds like a drop or external issue with having levels that low, something your tech tomorrow should be able to troubleshoot properly.

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Expert

Re: 95% drop in internet speed happening since few days.


@tchin11 wrote:

Power is a little lower than I'd like. It's all below -15dBmV.


A little lower than you'd like ? FWIW, that's out of spec !! Good luck with the tech visit ! Post back with how things turn out.



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Contributor

Re: 95% drop in internet speed happening since few days.

Tech came out today, did some work and cleaned up a bunch of the cables. As per my troubleshooting it all got back up to speed. Then randomly it's back down again.

 

Current power is as follows:

 

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 25 621000000 Hz -9.8 dBmV 39.3 dB 0 0
2 Locked QAM256 4 483000000 Hz -12.2 dBmV 38.3 dB 0 0
3 Locked QAM256 5 489000000 Hz -12.7 dBmV 36.5 dB 0 0
4 Locked QAM256 6 495000000 Hz -12.3 dBmV 38.1 dB 0 0
5 Locked QAM256 7 507000000 Hz -11.1 dBmV 31.4 dB 0 0
6 Locked QAM256 9 519000000 Hz -9.6 dBmV 40.1 dB 0 0
7 Locked QAM256 10 525000000 Hz -10.0 dBmV 39.8 dB 0 0
8 Locked QAM256 12 543000000 Hz -12.5 dBmV 38.0 dB 0 0
9 Locked QAM256 14 555000000 Hz -11.5 dBmV 38.9 dB 0 0
10 Locked QAM256 16 567000000 Hz -9.3 dBmV 37.0 dB 0 0
11 Locked QAM256 17 573000000 Hz -8.9 dBmV 39.9 dB 0 0
12 Locked QAM256 18 579000000 Hz -9.6 dBmV 40.0 dB 0 0
13 Locked QAM256 19 585000000 Hz -11.3 dBmV 39.0 dB 0 0
14 Locked QAM256 20 591000000 Hz -12.8 dBmV 36.4 dB 0 0
15 Locked QAM256 21 597000000 Hz -13.6 dBmV 31.8 dB 92 0
16 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
17 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
18 Locked QAM256 24 615000000 Hz -11.7 dBmV 38.2 dB 0 0
19 Locked QAM256 26 627000000 Hz -9.5 dBmV 40.8 dB 0 0
20 Locked QAM256 27 633000000 Hz -9.5 dBmV 39.9 dB 0 0
21 Locked QAM256 28 639000000 Hz -11.2 dBmV 30.3 dB 0 0
22 Locked QAM256 29 645000000 Hz -13.3 dBmV 34.9 dB 0 0
23 Locked QAM256 30 651000000 Hz -14.0 dBmV 34.3 dB 0 0
24 Locked QAM256 31 657000000 Hz -14.6 dBmV 34.6 dB 0 0
 
<tabindex=-1>Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 2 5120 Ksym/sec 23700000 Hz 46.0 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 17300000 Hz 45.3 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 46.3 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 46.5 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

 

 

This all started last Sunday. Everything was fine until then.

Contributor

Re: 95% drop in internet speed happening since few days.

There are also 5 timeouts since the tech came to visit and said the cabling and drop looked okay. This all occurs with two different modems and routers, and even when the PC is directly connected. This honestly feels like an issue further down the line from our house at this point. When it works, it's great. Then time-outs start up, and the speed tanks. Then it recovers.

 

I have been praising how great comcast has been for us, but looks like our luck ran out.

Diamond Problem Solver

Re: 95% drop in internet speed happening since few days.

You need a tech back out, the downstream levels and SNR are still lousy.

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Expert

Re: 95% drop in internet speed happening since few days.

Yep Andrew. Agreed ! Thank you !



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Contributor

Re: 95% drop in internet speed happening since few days.

So I decided to do some investigation of my own. It turns out that the tech left trash from his work all over my backyard (I took pictures). Cable clippings, old connectors, plastic bags from the new connector. I also placed all of the items into a baggy as evidence. I also found out that all 4 of the cables going out from the box to the house are frayed badly where they go under to the crawl space. I replaced the main cable that was frayed the most and already see an increase in poerformance. Speed tests are constantly 290+. I'm going to wait another hour to be sure.

 

I have 3 more cables to go now to see if this completely solves the lower power and signal noise issues, but I'm happy to see consistent speeds and pings again.

 

Also I had a good chuckle at @EG's response of "a little low?!" Thanks for at least helping me laugh through the frustration.

Contributor

Re: 95% drop in internet speed happening since few days.

Just wanted to add an image of the cables:

 

J92HSH7

 

 

I took this section of the worst offender as a trophy:

 

5xSzUHl

 

 

It's down to the copper in the lowest section.

Contributor

Re: 95% drop in internet speed happening since few days.

Last upate. Looks like the cable was the issue. I'm now 4+ hours with no speed drops. Thanks for the help @EG and @CCAndrew! Anyone who reads this, don't be afraid to do your own cable work. Just a quick YouTube video and some cables and parts away from making your life a whole lot easier!

Diamond Problem Solver

Re: 95% drop in internet speed happening since few days.

You’re welcome, what are your levels now?

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Expert

Re: 95% drop in internet speed happening since few days.

We can't see your pics, so just curious as to what you did exactly ?



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Diamond Problem Solver

Re: 95% drop in internet speed happening since few days.

The pictures are just of how the cables looked like they were chewed up by an animal.

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Expert

Re: 95% drop in internet speed happening since few days.

O/k thanks Andrew !



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Contributor

Re: 95% drop in internet speed happening since few days.

So sadly my journey to internet bliss is not yet complete. We started having the same issues yet again. My levels were still way out of spec. I decided to try to clean out the connectors for dust/debris to make sure nothing else was contributing and I found water coming out of the PoE filter.  Yikes!

 

So I disconnected it, and used some compressed air to dry it out. After doing that here are the current levels:

 

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 22 603000000 Hz -9.0 dBmV 39.2 dB 0 0
2 Locked QAM256 1 465000000 Hz -5.1 dBmV 42.5 dB 0 0
3 Locked QAM256 2 471000000 Hz -5.6 dBmV 42.1 dB 0 0
4 Locked QAM256 3 477000000 Hz -6.2 dBmV 41.6 dB 0 0
5 Locked QAM256 6 495000000 Hz -8.3 dBmV 40.0 dB 0 0
6 Locked QAM256 7 507000000 Hz -7.7 dBmV 35.5 dB 0 0
7 Locked QAM256 8 513000000 Hz -7.1 dBmV 40.3 dB 0 0
8 Locked QAM256 9 519000000 Hz -6.1 dBmV 41.7 dB 0 0
9 Locked QAM256 12 543000000 Hz -7.4 dBmV 40.4 dB 0 0
10 Locked QAM256 14 555000000 Hz -8.1 dBmV 40.1 dB 0 0
11 Locked QAM256 16 567000000 Hz -6.6 dBmV 41.1 dB 0 0
12 Locked QAM256 17 573000000 Hz -6.0 dBmV 41.8 dB 0 0
13 Locked QAM256 19 585000000 Hz -6.5 dBmV 41.3 dB 0 0
14 Locked QAM256 20 591000000 Hz -7.3 dBmV 40.5 dB 0 0
15 Locked QAM256 21 597000000 Hz -8.7 dBmV 39.3 dB 0 0
16 Locked QAM256 23 609000000 Hz -9.7 dBmV 38.9 dB 0 0
17 Locked QAM256 24 615000000 Hz -9.3 dBmV 39.4 dB 0 0
18 Locked QAM256 25 621000000 Hz -8.1 dBmV 40.3 dB 0 0
19 Locked QAM256 26 627000000 Hz -7.4 dBmV 40.8 dB 0 0
20 Locked QAM256 27 633000000 Hz -6.6 dBmV 40.8 dB 0 0
21 Locked QAM256 28 639000000 Hz -7.2 dBmV 40.3 dB 0 0
22 Locked QAM256 29 645000000 Hz -8.9 dBmV 39.4 dB 0 0
23 Locked QAM256 30 651000000 Hz -9.6 dBmV 38.6 dB 0 0
24 Locked QAM256 31 657000000 Hz -10.6 dBmV 37.8 dB 0 0
 
<tabindex=-1>Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 45.8 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 17300000 Hz 45.0 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 23700000 Hz 45.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 45.8 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

 

 

I'm going to order a new filter and just outright replace it, as well as make sure the connections are water tight.

Diamond Problem Solver

Re: 95% drop in internet speed happening since few days.

If the filter has water, chances are pretty good your drop has water too. Signals are still low but you haven’t said how many splitters etc you have. I would lean towards the drop needing replaced though.

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Contributor

Re: 95% drop in internet speed happening since few days.

Thanks @CCAndrew. So for splitters the drop connects to the box outside, and it's a single cable from the line to the house. Then that line goes into to the box. There isn't anything else inside the box (was outside with the tech yesterday). That line then just connects to the filter where I found the water. That then connects to the cable that was really badly chewed up (that I repaired), this line goes under the house to a connection point that I haven't been brave enough to face the spiders to investigate yet. That then goes to the connection I'm using in the wall where the modem is connected, and then there are 3 other lines back out to the box again for some reason. That splits to other connections that we aren't using. I'm going to cap those all off as in the box and remove the splitter to stop as much line bleed as I can. Hopfully this will reduce any additional noise.

 

I ran some cable directly from the filter (before I discovered the water) and the signal and SNR looked about the same as above. So I think that the water logged filter is likely the main culprit here. I'm also going to investigate a small water tight enclosure to go around the filter connections so the cables go in, filter and connections are protected, and then the cable goes out. I don't think I can repalce the enclosure box though, as we are only renting this place.

 

If this last attempt still doesn't work. I'm going to ask for a tech to come back to look into the line drop to see if there's additional water ingress on that line. The techs that were here yesterday were not very helpful, and kept trying to blame my modem (Approved Netgear C600 and back up C500) as well as my router as the issue. I ended up just telling them that I'd call support for additional help since they weren't willing to look into anything else. So I'm also likely going to ask for a tech that is a bit more seasoned and thorough here as well.

Diamond Problem Solver

Re: 95% drop in internet speed happening since few days.

It may also be the old splitter underneath that needs changing too if it’s not the drop. Someone’s going to luck out and have to get in the crawl space.

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Re: 95% drop in internet speed happening since few days.

I'm trying to eliminate all possibilities before we send someone to spiderville, and thankfully it appears it is related to water in the line. So spiderpocalypse avoided. For now.

 

So I woke up today and again we had issues. I went out and checked again. Water in the filter. I looked inside the cable from the drop and I see corrosion. So I went looking for another place the water could get in, and ther is a cable bridge under the roof overhang that was clipped in really bad spot where it could be inundated with water during heavy rain (the last week here) and covered in tape that was no longer doing anything. I removed the tape and opened up the connector bridge, and sure enough, water. So the water was likely coming down through there. I cleaned out the connectors, and retaped the bridge. I also moved it back and zip-tied it away from the water ingress crevace.

 

I have some waterproof connectors coming tomorrow. I'll redo that line down to the box and see if that finally resolve the water issues, but this could've all been handled and fixed if the tech actually did what he was supposed to do on Thursday.

Contributor

Re: 95% drop in internet speed happening since few days.

Final update! The new tech came out early on Monday, and since then the connection has been great. He's going to come out again on Saturday to look for any water ingress in the main line as well. He replaced all connections with weather proof ones, and did a great job. Things are back on track, and the connection is better than ever.