·Verizon Wireless
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Connection going from normal to very slow every 2-3 daysAbout a week and a half ago, my connection all of a sudden got very slow so after many modem and router resets with no change, I called Comcast. They said the signal levels on my modem looked fine and they couldn't really do anything to fix the issue. I just let it go and couple days after that, my speeds went back to normal, but then, a couple more days after that, I started to get slower speeds again, but for some reason, I just let it go again and they again returned to normal after a couple more days. Well, it's been a couple days again and speeds are again back to being slow. I thought it might be the router so I plugged the modem directly into a computer and no change. I've never experienced anything like this in the 8 plus years I've had Comcast. So, before I make another call to Comcast, I would like to get your opinions on this and if there is anything else I can do to try and resolve the issue. Thanks.
Here is what my modem currently shows:
It's the Arris TM402P
Downstream Freq/Power: 705.000 MHz -9 dBmV Signal to Noise Ratio: 35 dB Modulation: QAM256 Upstream Freq/Power: 29.000 MHz 46 dBmV Channel Type: DOCSIS 2.0 (ATDMA) Symbol Rate: 5120 kSym/sec Modulation: QAM64 |
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tshirt Premium Member join:2004-07-11 Snohomish, WA |
tshirt
Premium Member
2012-Sep-27 7:22 pm
downstream power is pretty low, COULD be a potential problem, depending which way it swings. SNR looks ok for such low power. Upstream looks ok. |
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·Verizon Wireless
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said by tshirt:downstream power is pretty low, COULD be a potential problem, depending which way it swings. SNR looks ok for such low power. Upstream looks ok. Well, now it's -8 and it does say For all modems: -10 dBmV to +10 dBmV "Recommended". The main thing I don't get is why is my speed going from normal for 2 or 3 days to super slow for 2 or 3 days, back and forth like that? |
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Extide join:2000-06-11 Salt Lake City, UT |
to fonzbear2000
SNR is way more important than the power level itself. With a 35db level it seems ok.
Keep some logs of the exact times it is fast/slow. See if there are any correlations (like slow in evenings/etc). Also have a look at signal levels when it is slow. |
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·Verizon Wireless
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said by Extide:SNR is way more important than the power level itself. With a 35db level it seems ok.
Keep some logs of the exact times it is fast/slow. See if there are any correlations (like slow in evenings/etc). Also have a look at signal levels when it is slow. It stays slow for 2-3 days straight and then goes to normal for 2-3 days straight. All day and night. The signal levels I already posted are from right now which is slow. |
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tshirt Premium Member join:2004-07-11 Snohomish, WA 1 edit |
to fonzbear2000
A 3.5dBmV fluctuation in signal on any given day is totally within normal range. so assuming your modem is exactly right about the level(it's not a precision meter, but a "close enough" sort of reading) depending on exact when you took the reading, it could actually be down at -12 or so part of the time, throw in changing temps/seasonal manual adjustments, and you could have such a low signal that your modem is constantly saying "sorry, I didn't hear that, please say again" continual resends could explain the bad performance days. It is borderline enough to make it worth calling in for a tech and fixing/adjusting it before you totally lose contact. |
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·Verizon Wireless
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I called Comcast again and they said the modem was getting lots of packet loss and that it was probably starting to die. I got a new modem and all is good now. Thanks so much for all your input. |
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