Thanks everyone. This is not a Docsys 3.1 modem like mine, it is a Docsys 3.0. Netgear CM1200 Modem (Question) Quick question, when the downstream light is blinking I read that it means it’s scanning for new channels. I have always used my own cable modems. I don't know how to tell from the event log if it is trying to reboot on its own inbetween. now for some reason my ISP changes them after a few minutes. It could be the comcast cmts or it could be the modem. But also I am now keenly aware this is not the apples to apples comparison I was looking for to get a real answer to my issue. that lets us check the signal to the isp. Solid green or white. No downstream channel is locked. 3. If the issue re-occurs than comcast can't blame the modem. Reset Button - Use this button in the unlikely event that you want to restore the default factory settings. What cable internet service do you guys have? When trying to connect, the upstream and downstream lights first go solid, then the internet light blinks, then the internet light goes out and the upstream and downstream lights start blinking continuously. Log In Sign Up. All wiring and all hardware in my house has been replaced by Comcast thsi week. Two or more downstream channels are locked. Two or more upstream channels are locked. 3. Click to enlarge. Been surfing through the forum posts, and seen some isues similar to mine, so I'm hoping someone can point me at a solution. If it does, then it seems like the problem has to be on their end. The frequency of the drops is completely random to me. I rebotted and it has stayed connected since, but still same issues show. Just have no idea what to do anymore. I restarted and rebooted it several times. After going through all the hoops with Netgear they insist the modem is good, it has to be an issue with the lines coming into my house from Comcast or an issue with how they have provisioned my modem. Subscribe for Updates. Unless something in the logs points to something else? Comcast swears that when they connect with their meter ALL channels lock, even the docsys 3.1 that isn't locking on my modem, and that the issue has to be my modem. I just can't undersand what the issue could be. The only non-spectrum approved modem for gig service I can see is the CAX80 but its not released yet. But I was surprised to hear that, she stated that gig service requires their modem ? Internet is working normally, just the light that’s blinking. Re: Downstream light keeps blinking update to downstream channels that will not lock due to dBmv and SNR problems. Can anyone help me with this issue? I tried to log into the modem interface, but without an active connection it would not let me. However, I had periods that lasted that long occasionally with my own modem not dropping so I'm not convinced yet. I have to be honest, I don't consider myself to be a conspiracy theory guy....but Comcast might just change my mind on this. BR500 VPN Currently Experiencing Intermittent Connectivity Issues. All I can think of is to ask Comcast to loan me one of their modems to see if the issue still happens. Blinking green or white. However, I know it might do it again in the future. Been surfing through the forum posts, and seen some isues similar to mine, so I'm hoping someone can point me at a solution. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Help Please! BR500 VPN Currently Experiencing Intermittent Connectivity Issues. But still my downstream light blinks, my downstream bonded channels still say partial service, and my OFDM Downstream channel still isn't locking. I didn't think I could log into the modem if there was no internet connection, but next tmie it drops I will go in and see if I can capture all the stats and the logs again. I also set it back to … WiFi 6 Access Points and devices are the future of WiFi. User account menu. I don't reboot the modem until the connection drops, then I manually reboot it (unplug, wait a minute, plug back in). I'm frustrated beyond words. But I am 100% convinced I could plug in a brand new CM1200 into my line and I would have the exact same issues of partial service and my connection dropping over and over because that channel won't lock. If it doesn't, it points more at it being a comcast issue. I used the photo button in the post, but that doesn't seem to have worked. Sorry, not sure I understand what you're asking. CM 1000 modem downstream light blinking green. I am going to attach my modem's power and SNR values, and the event log which does seem to contain some errors. Set your computer IP address, Subnet Mask, and Default Gateway to static. That helps. ‍♂️. Next time it drops, then log into the modem and get the screen snip of the cable connections page and logs. Will it stop blinking automatically or I need to manually reboot the modem? I found if I setup manually the Starting Frequency for the 8 channels on the Basic page/ during initialization and registration I get awesome results. Have the ISP check the signal and line quality UP to the modem. I Google the model and immediately my doubts start to creep in....Arris TG1682G. I’ve restarted modem many time but that doesn’t work. Even when I was on 100mbps plan, the docsis 3.1 locked. Thank you! Solid amber. Also, if you have any splitters, amplifiers, or attenuators in line, remove them. Was out for awhile tonight and when I came back of course the signal had dropped again. Turn off the router and then turn it back on to see if the Power LED turns green or white. If it works, then it is indeed a modem issue. Press question mark to learn the rest of the keyboard shortcuts. I have the Nighthawk c7000 cable modem router. that lets us check the signal to the isp. The most positive reviews I can find say it's an "adequate" modem, but a real **bleep**eshow of a router. I left my modem plugged in for hours, just in case. It's been a super frustrating week with my connection and I'm trying every avenue possible to fix it.... to attach them, click on "choose file" under this text box when doing a reply. It was working fine since I bought it in April 2016 until recently. Trying to add just one again below, if it doesn't become visible, can anyone advise with specific instruction as to how to insert an image into my post please? there isn't a good one. I can try to get my modem replaced with Netgear. I did notice the OFDM downstream channel wasn't locking, but my service isn't gigabit, so wasn't sure if it was supposed to or not. Also, if you have any splitters, amplifiers, or attenuators in line, remove them. The downstream light on my CM1000 modem starts blinking green out of nowhere; and I lost WiFi after it starts blinking. Upstream. > Does anyone know why my imported images of my modem screens aren't> showing? Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. All but Ethernet lights flashing rapidly on CM1000. Subscribe for Updates. This button is recessed to prevent accidental resets of your modem. So Comcast was back this morning for the 4th time in 6 days. But being boxed into a corner needing to get online for work and my son's school, on it goes. Thanks for the reply! This resulted in no change other than my power levels which came down a bit on the downstream side (still betweeen 1 and 4 on all channels though) and coming up on the upstream side (42). It's obviously used, and from what I can find online, is a model that came out 4 - 6 years ago, and is pretty universally panend as a piece of crap. This modem won't have that problem because it doesn't have that channel. You don't have the downstream channel bonded. The time required varies. My power, upstream, and internet lights stay lit, and the downstream keeps on blinking. I just don't know what my recourse is at this point.... Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. However, it’s been more than 24hs already that the Modem started blinking the light for Downstream. Close. Model: CM1200|Nighthawk Multi-Gig Speed Cable Modem, CM2000-> Arris AX11000 W31-> GS716v2-> WAX***-AP. The Netgear CM1000 has the following ports available on the back of the modem. Be sure your using good quality RG6 coax cable up to the modem. However, it doesn't appear the logs get wiped upon reboot. So I go to Comcast and they give me a modem/router combo device. With netgear modems, the logs/connections pages clear on reboot. That part baffles me. There you go, it’s all purely default. I'm really hoping someone can help because I've had Comcast at my house three times this week, and although the power levels are much better now after they changed out most of the lines and equipment in my house, that downstream light still blinks and I'm still getting dropped connection, even though it is less than before. Back View. Should I enable or change anything within here? The cable modem is scanning for a downstream channel. Maybe it was the device. We hope you'll join the conversation by posting to an open topic or starting a new one. Do you have a screen snip of your modems connections page and logs? I am trying now to just copy and paste the images in but that isn't working either. Press and hold the Reset button to restore the router to its factory settings. By the way, I rebooted the Modem through there and the downstream light stopped blinking. One upstream channel is locked. I've had to cave before and rent a modem for a month. Be sure there are not coax cable line splitters in the between the modem and ISP service box. All I can figure is there is a problem with the line somewhere leading to my house, or twice now Comcast has fouled up the provisioning on the modem. If it doesn't, then all I can figure is it is my modem I guess, even though I've gone through all the checks with Netgear, and despite the fact it worked perfectly before COmcast's first trip to my house this week to switch the lines over to fiber. I have their blast plan which says 200 for download, but I regularly get around 240. when you first log into the cm1200, its the internet connection icon. As soon as the tech left and I reconnected my modem (he had his meter on that line before leaving) it connected and then dropped right away after 1 minute.


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