What are uncorrectables modem This is after being on for about 4 hours. I have been having issues with voice chats going in and out on apps like discord and teams. After some configuration of the Orbi, I was getting great speeds for what I'm paying for (700Mbps wired, 300 wireless, and I'm paying for 600). Let’s think of this as a box of chocolates, where BCH is the small foil wrapper around each individual chocolate and LDPC is the box protecting all of the chocolates inside. 16 and over 10,000 on CH. Here's some of the modem levels found under the Downstream OFDM Channels section (I tried copy and pasting but the formatting was a mess so just going to write down the data in order). The coax cable going into my modem looks a bit warped at the end. Jul 7, 2020 · Background: I previously had a Cox DOCSIS 2. Ran the comcast co-ax source to a new room and some ethernet. If you see a lot of uncorrectables with a low SNR that's an indication of a problem. XFinity keeps saying the connection is fine. 0 and you must have the 3. Thoughts on how to proceed here? We would like to show you a description here but the site won’t allow us. I am getting event code 16 and event code 24 about 6 times an hour in the event logs. Since that time I've been taking a screenshot once per day of my counts and making a graph to make the data easily digestible at a glance. i see lots of uncorrectables on my modem Arris SB6183. When the cable modem receives the data frame it has to first decode the LDPC and then the BCH. Signal levels on this modem were -2 and 43 I believe. Oct 10, 2023 · Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. It's likely the number is below 0. Mar 15, 2018 · I'm getting a large amount of correctable and uncorrectables errors in the log. The coax cable running downstairs may be a bit old. I went outside and connected modem directly to the drop outside and found levels were good (US Jan 28, 2020 · It could say 10,000 and mean nothing. My main concern here is the really high number of Uncorrectable codewords. I reset the modem a couple days ago, but the uncorrectables have racked up again. Jul 9, 2021 · Large number of uncorrectables Arris sb8200 modem, 1200 mbps service - Up until recently (about a week now), my correctables and uncorrectables were always close to zero. Regardless, the Arris recommended levels are similar to the levels you posted. I found that my US (Upstream) power (modem transmitting data to the ISP) was intermittently maxing out (I forget the max for the SB Modem, but it was ~50dBmV) resulting in T3 and eventually T4’s multiple times/day. When I have a problem, the power level on downstream OFDM drops significantly and SNR/MER drops drastically as well. Have had 4 technicians in the house so far to get all of that done and no one has requested a maintenance ticket yet. Generally nothing, but a few thousand now and then is fine. 82 (i downgraded to test if software was an issue). Dec 8, 2020 · The status listed show the connection state of the cable modem. I wouldn't have noticed the change but my connection has dropped intermittently several times in the last week. Nov 18, 2019 · Been having high correctables and uncorrectables looking for answers to why it is happening and how to fix it The raw number of uncorrectables is irrelevant. That amount of uncorrectables over the course of 29 days is nothing to worry about if you aren't seeing connection issues. Aug 12, 2020 · The modem has only been powered on for 1 days 01h:17m:34s. Current: I have used both Mar 26, 2021 · They will be able to poll the CMTS to see whether or not everything is in the green zone, see your node / cable plant and modem health, and also see a history plot for the modem. 5 40. If your modem is behind a splitter try removing the splitter or moving the modem to a coax connection that is closer to where the line from the street enters your home. Correctables - Or CRC errors - Aren't necessarily bad; your modem will inevitably have some error'd bits it needs to correct, and, it has 0 "uncorrectables" which means that all of the errors were corrected. now I see 16 down but I see issues on correctables - before that was also a lot of Jul 2, 2007 · When we had trouble with our cable modem a few years ago it was the 3rd tech that figured out that the signal was too strong and lowered it down with an inline connector (was older infrastructure where we are, since upgraded). Since then, I decided to measure very carefully and intentionally the rate at which uncorrectables are accumulating. ChicagoAmazing Persistent Slow Internet with Arris S33 Modem - High Uncorrectables on Multiple Channels Closed Sep 10, 2021 · The ethernet cable from the modem to the router is a Monster brand (140272-00) cat5E 3ft cable (bought brand new yesterday). But the Arris S33 modem is performing flawlessly otherwise!. This is literally the only device connected to our main cable May 6, 2025 · Pushing the forward error correction envelope is literally a part of the equation in achieving the immense spectral density and, thus, astronomical speed of DOCSIS 3. 1 OFDM and it looks like yours is doing the full-blown 192-MHz-bandwidth, possibly even with the top-end 4096-QAM constellation. It's normal for the OFDM channel to show huge numbers. To give you something for comparison, I just checked both of my modems at two different sites and both of them have a ton of uncorrectables--I need to call my isp as well! May 28, 2008 · I pulled the uncorrectables from the mib browser and saw that this one modem had 77,387 uncorrectables and ping the modem was getting response times ranging from 1200ms to 1600ms. Following the change this issue seems to be corrected. And all those uncorrectables may have been accumulated during maintenance or similar. Tech hooked up his meter and I pinged the modem in it all was good. Is this a ISP issue? Occasionally the modem goes offline and requires a Mar 7, 2025 · Downstream Bonded Channels Channel Locked Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 11 Locked QAM 256 11 345000000 Hz 9. 00, according to my Cable Modem's uptime statistic. My CM700 is running v 1. When I was looking at my modem, it seems like I have a very level of uncorrectables that seem to keep going up by the hour. Your SNR is great, as are your power levels. Be sure to power OFF the modem for 1 minute then back ON. 2 after only 2 hours of uptime. Most of the time this happens during the initial boot up while it is syncing, it's just bound to happen. Before it was only bindgon 8 channels down and 3 up. I have tested from wired and wifi and that does not appear to be the issue. All other modems were around 16ms to 30ms. And the channel #19 will jump back to ~37. This house was built in 2002. I have reset the modem and changed the coax cable. Aug 14, 2023 · I am having frequent disconnects. They are used by your service provider to evaluate the operation of the cable modem. Recenly there is high ping and streaming is hard and gaming is even harder. I also replaced the splitter with a double male coax connector. 0 Modem (I had a 200 Mbps plan). The technician who installed the modem also included a 6 dB attenuator on the coax cable. See below. 1, otherwise, in my opinion, they redirect to you with the dropping of the speeds. Sep 24, 2024 · Hello, I recently got a CM3000 modem (from SB8200) to take advantage of the new upload speeds. Sep 6, 2021 · I logged into my modem status page and saw I was having a lot of errors in the log and high number of uncorrectables on all my Downstream Bonded Channels. He said that a lot of tech's think that the stronger the better when it should actually be kept in a healthy range. Jun 20, 2024 · Connecting my laptop directly to the modem did eliminate the wifi packet losses, but not the uncorrectables--as expected. I switched to this modem 6 months ago when XFinity claimed my p Attaching photos of my modem status (note the modem was restarted last night - prior to the restart I had uncorrectables on nearly every channel) Also attaching a diagram of my network setup. In the meanwhile, the uncorrectables continue to creep back up. For uncorrectables, the key is to notice an issue and then monitor it. Is this a problem with the Netgear device of a problem with the ISP (Spectrum)? Sep 3, 2021 · Different modems connect differently to the same signal, so they may have to adjust the signal for this modem. Replace them if you do. Speed test show +200 Mbps so it is not the speed, but I looked in the log and the setup and restarted it . Mar 28, 2025 · Determine what's slowing down your modem with this troubleshooting guide From time to time, modem signal levels can become out of specs. Turning off the modem and waiting for 20 minutes will reset the errors (as expected), and they stop going up for a few hours (1-20 uncorrectables per hour). Like you said, higher accumulation of uncorrectables are where a problem indicator comes into play. What actual issue are you having aside from seeing numbers on your modem? Apr 3, 2022 · I have had no previous problems for the 2 years I have owned the CM700 modem and Nighthawk 7800 combo. Ideally, you should have 0 uncorrectables but a few here and there are ok. 08 and my 7800 is running v 1. At this point, they've replaced the router & modem, added a unity gain amplifier and made sure all of the coax connectors are correct. This is the Nov 19, 2021 · Hello, I recently bought a CM1000 and have it hooked to an Orbi router with satellite. 5dB Apr 15, 2022 · The CM1000V2 is modem only and I have Google Wifi setup in the house. This lasted for a couple days, but then I noticed extremely slow speeds (40 - 60Mbps wired, 20 - 30 wireless), constantly dropped connections, and difficulty in even Jun 3, 2019 · Hi I have not had any issues with my RCN and CM500 modem for 6 months. The line coming in to my home is only a year old, and the one that is spliced to it that runs in to my wall is only 6 months old. I have noticed channel 1 is having tons of issues can anyone give me some insight as to what might be going on? What is channel 1 even used for and why is it having so many issues? May 17, 2021 · Thank you! I just plugged in a new modem, have been using it for about 15-30 minutes, and the connection seems to be better--see screenshot here. I'm in week 6 of fighting to resolve my intermittent internet outage situation. 01% which makes it a non-issue. My concern was the OFDM channel uncorrectables and the lower upstream power levels. 3 2094 2516 From the Cable Diagnostics I see Uncorrectables, for an example channel, as 2516. Could it just be that the modem, which was purchased in 2018, needs to be replaced? If the issue comes back, I will definitely try plugging in the modem closer to the source. Took a look at my cable modem and noticed over 300,000 uncorrectables on CH. Correctables are errors the modem was able to correct. I had a similar issue with uncorrectables and a faulty splitter or normal signal degradation caused by it was causing the issue for me. I was going from 5mbps to 75mbps. Mar 8, 2021 · I seem to have touched on a nerve. Feb 25, 2021 · I logged into our Arris SB6190 modem and noticed that uncorrectables are 10x correctables. Aug 8, 2020 · 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. This is usually a symptom of degrading or underperforming hardware or another problem. This is easily reproduceable. I reset my modem with the Comcast app via a reset signal from the ISP on 3/19. S33 Cable Signal Levels And the S33 uses a Broadcom chipset. Was getting numbers lower than -15, so disconnect everything but cable modem, and got power level numbers to sometimes have levels in positive range and under -10. Is this concerning, and is there anything I can do about this? After 4 days of uptime, seeing lots of Uncorrectables pretty much every channel. Apr 5, 2020 · Hi all, I have been experiencing internet issues for the last 3 years at my home. Divide the number of uncorrectables by the total number of octets. Does anyone know why I have so many uncorrectables on these channels? They illuminated the modem of the 3. Before the change I had a major issue with the shitty co-ax in the wall of the house causing a lot of "uncorrectables" on my Arris modem on many different channels. I gathered that that high of a number of uncorrectables isn’t good, but could grounding the splitter really have fixed whatever was wrong with the signal? Tl;dr internet at my house crashes a lot and has high number of uncorrectables when I log into the netgear modem interface online. 02. What does that indicate? Modem is direct no splitters or filters… My modem is a Netgear CM1200. Feb 3, 2023 · I also replaced my aging modem with a new Arris SB8200 modem. ugpmlae ofwtm2 oymo arq w5dk 5wvkcd yl7uwb y8zxw tmdtd f09fv