I've been having this problem for pretty much weeks at this point with no end in sight. As frustrating it is in itself, it's even more enfuriating because the thing seems to do this whenever it pleases.
To make the long story short without leaving out important details before I go on a research paper long rant: My internet keeps dropping out at random times for only 1-3 minutes at a time. It's always back very soon, but then it goes down again, sometimes hours later, sometimes IMMIDIATELY after. It is completely random, the last person I spoke to suggested this is because of my internet speed (my speed is fine for what I do, I have no complains about it, and I do quite a few speed-reliant things) and that I use too many things at the same time, and that I should minimize the amount of things using WiFi/Ethernet at the same time, yet it went down 4 times in 50 minutes the other night when I was trying to watch a YouTube video on my phone, and worked for hours on end while I played a really fast paced video game connecting from the West coast of the US to a European server.
There was a precedent to this, it used to go down much less frequently but it did so for longer periods of time. I called Time Warner, we arranged to have a tech come out, but eventually I got a call from them saying it was fixed, so we cancelled the appointment. And it WAS fixed. It worked for about a week or so, then it started doing what it's doing now. I made a call, they said they made some changes to the settings and that it should work now, but that was not the case. I called most recently yesterday, they said they changed some things again and they'll monitor it and I should give it until Tuesday (3 days from now) while they monitor it, if nothing happens they'll send a tech out. It's still doing the same thing and it shows no signs of stopping, and I am DEFINITELY not willing to let this mess up my 4 day weekend if I can help it.
Some notes: I have tried switching channels multiple times, 1, 6 and 11 all have it happening. As silly as it sounds I have tried to rotate, flip, etc the modem/router box (it's the one Time Warner gives out, an Arris, not sure of the model but probably the newest one since this was installed about a month ago), didn't help, neither did resetting it. I use the 2.4g connection and don't really touch the 5G, but they both go down simultaneously. The 2.4g blinks sometimes but the connection works anyway, but when it goes down, all the lights stay on for a while, then the 2.4g and 5G lights go out, while the Online light starts blinking, until it all goes back to them constanlty being on again and the internet coming back on. I do NOT have any TV and there's nothing that should be interfering. I only use my laptop, desktop and phone, at least as of late.
Any help would be greatly appreciated, if you need me to provide event logs or something similar, tell me and I will do so.
Some things I missed/got wrong: The US/DS light actually blinks, the Online light completely shuts off, the model is an Arris DG1670A which seems is NOT a new model.
copy and paste the modems signal level and error log pages, hopefully a few hours after a reset. Need real history.
Sorry for the late reply. Here are the logs. I have also turned off 5G, let the thing have its own outlet, turned off Firewall, enabled WMM and AP Isolation, it lasted a few days without turning off, now it started doing it again. Literally nothing I try helps. And after I fix it, it just gets worse.
|Downstream 1||32||705.00 MHz||7.60 dBmV||40.95 dB||256QAM||3801452||4||35|
|Downstream 2||9||567.00 MHz||10.20 dBmV||40.37 dB||256QAM||5114338||1||0|
|Downstream 3||10||573.00 MHz||10.30 dBmV||40.95 dB||256QAM||1621375||0||0|
|Downstream 4||11||579.00 MHz||10.00 dBmV||40.95 dB||256QAM||5637639||0||0|
|Downstream 5||12||585.00 MHz||10.20 dBmV||40.37 dB||256QAM||252849||0||0|
|Downstream 6||13||591.00 MHz||10.10 dBmV||40.95 dB||256QAM||182089||0||0|
|Downstream 7||14||597.00 MHz||10.00 dBmV||40.37 dB||256QAM||2532886||0||0|
|Downstream 8||15||603.00 MHz||10.00 dBmV||40.37 dB||256QAM||4366977||0||0|
|Downstream 9||16||609.00 MHz||9.70 dBmV||40.95 dB||256QAM||8343008||0||0|
|Downstream 10||18||621.00 MHz||9.70 dBmV||40.95 dB||256QAM||884096||0||0|
|Downstream 11||19||627.00 MHz||9.30 dBmV||40.95 dB||256QAM||10281997||15||0|
|Downstream 12||20||633.00 MHz||9.40 dBmV||40.95 dB||256QAM||17674890||0||0|
|Downstream 13||24||657.00 MHz||8.50 dBmV||40.37 dB||256QAM||4716091||0||0|
|Downstream 14||28||681.00 MHz||8.00 dBmV||40.95 dB||256QAM||2775452||0||0|
|Downstream 15||29||687.00 MHz||7.50 dBmV||40.95 dB||256QAM||2612982||0||0|
|Downstream 16||30||693.00 MHz||7.80 dBmV||40.37 dB||256QAM||1681901||0||0|
|Reset FEC Counters|
|UCID||Freq||Power||Channel Type||Symbol Rate||Modulation|
|Upstream 1||90||23.30 MHz||44.50 dBmV||DOCSIS2.0 (ATDMA)||5120 kSym/s||64QAM|
|Upstream 2||92||37.00 MHz||49.75 dBmV||DOCSIS1.x (TDMA)||2560 kSym/s||16QAM|
|Upstream 3||91||30.60 MHz||46.00 dBmV||DOCSIS2.0 (ATDMA)||5120 kSym/s||64QAM|
|Upstream 4||89||18.50 MHz||44.25 dBmV||DOCSIS1.x (TDMA)||2560 kSym/s||16QAM|
|Date Time||Event ID||Event Level||Description|
|9/6/2016 13:18||82000400||3||Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:cf:e2:9d:0b:42;CMTS-MAC=00:01:5c:67:7c:5d;CM-QOS=1.1;CM-VER=3.0;|
|9/6/2016 13:19||82000200||3||No Ranging Response received - T3 time-out;CM-MAC=14:cf:e2:9d:0b:42;CMTS-MAC=00:01:5c:67:7c:5d;CM-QOS=1.1;CM-VER=3.0;|
|9/6/2016 20:15||82000400||3||Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:cf:e2:9d:0b:42;CMTS-MAC=00:01:5c:67:7c:5d;CM-QOS=1.1;CM-VER=3.0;|
|9/6/2016 20:16||82000200||3||No Ranging Response received - T3 time-out;CM-MAC=14:cf:e2:9d:0b:42;CMTS-MAC=00:01:5c:67:7c:5d;CM-QOS=1.1;CM-VER=3.0;|
|9/6/2016 20:29||82000400||3||Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:cf:e2:9d:0b:42;CMTS-MAC=00:01:5c:67:7c:5d;CM-QOS=1.1;CM-VER=3.0;|
|9/6/2016 20:30||82000200||3||No Ranging Response received - T3 time-out;CM-MAC=14:cf:e2:9d:0b:42;CMTS-MAC=00:01:5c:67:7c:5d;CM-QOS=1.1;CM-VER=3.0;|
You need to make sure everything is tight and no extra splitters. If nothings obvious, You're going to need twc out, something is causing the T3 and T4 errors and resets.
TWC have been nothing but unhelpful, contradicting themselves left and right. I don't have any splitters whatsoever. Everything's plugged in directly to the wall.
Doesn't seem so. I'll call them to send out a tech, but basically the error resets in the logs is it not getting enough power or?
T3 and T4 issues are usually an upstream data collision or loss issue, can be electrical noise, radio ingress, bad modems elsewhere on the node.
We as users don't have access to the CMTS side at the head end to see what the upstream looks like.
So you gotta call TWC
Especially neighbors that are having the same problem, It might get escallated to someone that cares to troubleshoot it
Your levels look good, but there's too many T3 or T4's a day.
A lightning strike in my neighborhood caused this today:
|Sep 07 2016 13:55:40||3-Critical||T05.0||SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:77:ac:;CMTS-MAC=00:01:5c:8a:80:62;CM-QOS=1.1;CM-VER=3.0;|
But it didn't reset the modem
I was getting daily T3 errors thanks to a bad hardline connector down near the end of the node, yet my levels were good. That was repaired last week, it was locatable by the excessive egress/leakage at that pole and I pretty much had it narrowed down to 2 of 6 connectors up there. Since then, only a few T3 and T 4's occured when the tech was replacing modules in an amp upstream of me. There are still a bunch of subscriber drops that need to be repaired.
It's always worst than pulling teeth to get TWC to fix anything other than at your own address.
Tech is up on the pole and won't replace the green F connectors that were bad 4 years ago...
The latest batch of F connectors that have the rubber seals are absolute junk, All of mine are split open after just 3 years outdoors and are not in any direct sunlight .