NMK @comcast.net |
NMK
Anon
2015-Feb-20 7:35 pm
[Connectivity] I can track my internet getting slower with tempSo in the past couple days the temp here in Indianapolis has been -11 at some times. During the evening when it dips the most i can honestly watch my internet speed and ping become worse as the temp goes lower. Currently the temp is 15 degrees and my dl speed is only 3.5 mbps (normally 50) but upload is fine at 11.18. Last night when it went down to -11 my internet stopped functioning.
Any suggestions here? |
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train_wreckslow this bird down join:2013-10-04 Antioch, TN Cisco ASA 5506 Cisco DPC3939
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Post a screenshot of your signals from » 192.168.100.1 or » 10.0.0.1 . While the levels will normally will fluctuate with colder/warmer temps, you may have other signal problems that we can troubleshoot. Also describe your home network setup (how you are testing speeds, router, wired or wireless, etc.) |
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to NMK
For me, when the outdoor temperatures have been near 0 degs F (like this morning), the downstream carrier levels displayed by my ARRIS TM822G eMTA are about 8 dB higher than usual (but the SNRs drop by 2 dB or more). The upstream carrier levels only decrease by 1 dB or less, however. I've never noticed any change in my speeds, though. See this thread from last winter: » [Connectivity] I hate cold weather |
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nmk @comcast.net |
to train_wreck
here is the signal. Im getting about 5-7 down right now. Keeping in mind i normally get 50. I talked to comcast and they are supposed to have someone look at the outside line but who knows if they will actually come out. |
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train_wreckslow this bird down join:2013-10-04 Antioch, TN Cisco ASA 5506 Cisco DPC3939
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So according to this: » Comcast High Speed Internet FAQ » What should my Signal Levels be?Your downstream SNR is right at the minimum, and you have a considerable amount of codeword errors. This likely will be a truck roll thing. One thing, what's the path of the coax cable going from the modem to the eventual outside of the house? Any splitters or other pieces of equipment connected? |
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NMK @comcast.net |
NMK
Anon
2015-Feb-21 12:54 am
The cable runs from the box in the street to the box on the house. Lovely that i have alot of errors. Appreciate you guys looking at it |
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I'm thinking that maybe the downstream transmission rate isn't actually dropping, but the net user data throughput is, due to all the packet retransmissions that are occurring, given all those "uncorrectable" codeword errors shown. Each time the modem cannot correct an errored codeword, it must request that the CMTS re-transmit it again [and then hopefully receive it "unerrored," or can at least correct any errors in it using the "Forward Error Correction" (FEC) coding that's used]. |
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NMK
Anon
2015-Feb-21 10:55 am
So do you think a new modem is in order or that it's the equipment out side |
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said by NMK :So do you think a new modem is in order or that it's the equipment out side Given the variation with temperature, I would say it's most likely due to something outside. |
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telcodad |
Sunny and 45 degrees |
said by telcodad:For me, when the outdoor temperatures have been near 0 degs F (like this morning), the downstream carrier levels displayed by my ARRIS TM822G eMTA are about 8 dB higher than usual (but the SNRs drop by 2 dB or more). The upstream carrier levels only decrease by 1 dB or less, however.
I've never noticed any change in my speeds, though.
See this thread from last winter: »[Connectivity] I hate cold weather Well, now that we're experiencing sunny skies and above 40 degs F temps here today, my downstream signal levels and SNRs are headed the other way now (into the crapper), especially on the highest 2 channels in frequency. What line equipment could be responsible for this? |
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gar187erI DID this for a living join:2006-06-24 Seattle, WA |
bad/stuck adu, amp going bad, power back malfunctioning...
your signal gets worse the higher it goes....could be water in tap.... |
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said by telcodad:said by telcodad:For me, when the outdoor temperatures have been near 0 degs F (like this morning), the downstream carrier levels displayed by my ARRIS TM822G eMTA are about 8 dB higher than usual (but the SNRs drop by 2 dB or more). The upstream carrier levels only decrease by 1 dB or less, however. Well, now that we're experiencing sunny skies and above 40 degs F temps here today, my downstream signal levels and SNRs are headed the other way now (into the crapper), especially on the highest 2 channels in frequency. What line equipment could be responsible for this? said by gar187er:bad/stuck adu, amp going bad, power back malfunctioning...
your signal gets worse the higher it goes....could be water in tap.... OK, thanks. Thankfully the Video QAM carriers that the NASCAR Daytona 500 race are on are lower in frequency (273 MHz SD / 471 MHz HD). Although I do have the ability to receive the NYC Fox station OTA if necessary. |
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to telcodad
I've had an outage all afternoon since 1pm with the Upstream power levels reporting 50 and 51 dBmV from my usual 48.3 dBmV and my modem not being able to latch onto any upstream channels. I called Comcast, they said it was a firmware update to Motorola and Zoom modems for NJ according to an email from the engineers and that I shouldn't have another issue. Modem never got an update (and I've seen nothing on the forum about people reporting any updates) but the connection came back. I went out and came home around 3pm and found the same problem. Was on the phone with techs, they simply said the modem was reporting as offline and couldn't really help me but either replace the modem or have a tech come out. So that's what I did. Modem came back online about 83 minutes ago and upstream dBmV is back at 48.3 and 49.0 though I still want the tech to check things out outside, might need line maintenance to check it? I honestly am thinking the fluctuating temperatures and rain and snow is becoming an issue. |
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gar187erI DID this for a living join:2006-06-24 Seattle, WA |
nothing works well in zero degree temps....cable included
a .7 flucuation in levels isnt going to cause you to go offline, something else was going on. you wont get a line tech to check it out if your modem is online. they have wider more pressing issues to deal with. if you service guys finds something though he will submit a ticket for it. |
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train_wreckslow this bird down join:2013-10-04 Antioch, TN Cisco ASA 5506 Cisco DPC3939
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to telcodad
said by telcodad:I'm thinking that maybe the downstream transmission rate isn't actually dropping, but the net user data throughput is, due to all the packet retransmissions that are occurring, given all those "uncorrectable" codeword errors shown. Interesting, never considered that correlation. So the "codewords per second" may be normal, but the "megabits per second" may not. |
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Early Morning and 1 deg |
And now, early this morning, it's 1 deg F outside and my downstream signal levels are way up (more than a 20 dB swing), with the SNRs 3 to 4 dB worse than normal (most likely due to noise amplification somewhere). |
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