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9 Messages
Seriously slow download speeds for 9 days now
Comcast did some scheduled maintenance in my area about 9 days ago and ever since then I have been getting intermittent and random slowdown of my download speed. Of course I got the usual runaround from the CSR rep at Comcast so I figured I would give the forums a shot to see if any of you could assist me in determining if the problem is with my modem (what comcast thinks) or with something that Comcast did to screw up my service when they did the maintenance 9 days ago (what I think).
Modem: Netgear CM400
My Provisioned Speeds: 150/10
Here is what my speedtest result and modem up/down stream settings look like when I am having issues and before I restart my modem:
Ping: 31ms - Download: 3.12mb/s - Upload: 11.70mb/s
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| Current System Time: Thu Sep 19 20:41:16 2019 |
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And here is what my speedtest result and modem up/down stream settings look like when I am NOT having issues and after I restart my modem:
Ping: 30ms - Download: 175.92mb/s - Upload 11.84mb/s
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| Current System Time: Thu Sep 19 20:57:40 2019 |
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| System Up Time: 00:12:43 |
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To be honest I do not see much difference in the up/down stream figures when my internet is working properly and when it's not so I don't know how useful that information is, but I included them anyway.
I do have a router, but I took it out of the equation and directly connected my modem to my computer via a Cat6 cable and that did not seem to change anything.
Trying different cables did not seem to make any difference either, nor did reseating the cable splitter.
The modem is warm, but not hot and feels the same temp even when everything is working fine.
I also connected directly to my laptop just to make sure the problem was not with the ethernet port on my desktop and I had the same result.
I am kind of out of ideas at this point but willing to take suggestions and thanks for any and all replies in advance.
EG
Expert
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111.4K Messages
6 years ago
The downstream power is on the low side and it may be intermittently fluctuating even lower to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
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EG
Expert
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111.4K Messages
6 years ago
Multiple dwellings are particularly troublesome ! That's a good splitter ! If there is nothing that you can do from those tips, then as stated, get a tech out to investigate. Good luck with it !!
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mictodd73
New Poster
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9 Messages
6 years ago
@EG
Thanks for the reply and I only have one splitter in my apartment and it is the one that was supplied to me by Comcast. Here is more info about it:
It is not gold plated or anything like that and seems to have the recommended specs that you said I needed so that part should be fine. I live in an apartment complex and I cannot even see the outside cable line anywhere so I cannot even check to see if there is any issue there.
As far as taking the splitter apart and cleaning it goes, I do not have the skills or tools required for such a task but I do have a couple of coax couplers laying around that I could use instead of the splitter since I am only using one line on the splitter anyway.
I am not sure if it wll make any difference though, but it's worth trying I suppose.
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