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CM1200 useless on Charter/Spectrum after they enabled OFDMA on upstream channels
Purchased a CM1200 modem a few months back to use with my spectrum service. Has been working fine for the last 3 months with OFDM on the downstream channels and regular upstream bonded channels. Ab...
Any motion with this and Spectrum? I'll also DM you just in case there's something I can do or test... because this just recently started happening to me as well. Endless T3 and T4 timeouts, causing eventual connection instability/intermittency.
Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
Draco wrote:Any motion with this and Spectrum? I'll also DM you just in case there's something I can do or test... because this just recently started happening to me as well. Endless T3 and T4 timeouts, causing eventual connection instability/intermittency.
I have two contacts at netgear who worked on my behalf to get my own modem upgraded to firmware version 3.02.01. Charter should be making 3.02.01 the new default version for anyone using a CM1200. They are dragging their feet and not responding to my repeated emails. It is very frustrating. I have threatened another FCC/BBB complaint as others are now reaching out as they enable OFDMA in more markets across the country.
Interesting. Well here's hoping I can eventually get that done. This a user-initiated thing or something done on Spectrum's end?
Hardware Version 1.01 Firmware Version V1.02.01 Well after A LOT of reading on this same issue with threads even you replied to, I feel bad even bumping this thread to the top!
Shame on Spectrum for holding out this long. I wish I knew when they did this "upgrade" and it sounds like I need to dig down deep to get it fixed. Sad.
For anyone else coming across this thread feel free to read up here instead:
https://www.dslreports.com/forum/r32832397-Netgear-CM1200-is-now-crap-OFDMA-just-enabled-on-upstream
Guess that FCC/BBB report is in order.
Sorry revisiting this thread as I’ve just recently had the same issue. Been back and forth with spectrum and they are telling me it’s an issue with docis 3.1 and want to flip out my modem with theirs. You were able to have them push out a firmware update? Netgears site has listed the v 1.02.01 for spectrum updated firmware. Who/how did you get them to update to 3.02.01. I feel like I’m going to call and say upgrade and they are just going to do no dice. This seems like it’s been an issue for years where ofdma upstreams are being used. Any help would be greatly appreciatedI was able to get two contacts at netgear who coordinated with spectrum and pushed the newer firmware out to my modem and exempted it from being downgraded. I will PM you their email addresses. They are well aware of the issue and pushing to get the firmware approved for system wide deployment to all users running the CM1200