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Forum Discussion
EverymanToo
May 28, 2025Tutor
New CM205V Interferes with TV Signal
When a CM2050V is connected to a three-way coax splitter (the modem, and two TVs to Xfinity Voice/Data/Cable television service, it disrupts the signal to the two tvs. Disconnect it, and the TVs are...
- Jun 06, 2025
Way too many correctable/uncorrectable errors for a 24 hour period of time.
DOCSIS 3.1 is backward compatible with DOCSIS 3.0. I do not think DOCSIS 3.1 is backward compatible with DOCSIS 2.0. If you are looking at DOCSIS 2.0 hardware, you want to check the coax type to ensure it is correct for the current DOCSIS 3.1 connections (RG6).
What were the upload/download throughputs with your new splitters in place?
You might find some ideas in chapter 3 of this reference: https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
EverymanToo
May 29, 2025Tutor
Info as requested. Looks like an awful lot of errors...
- FURRYe38May 29, 2025Guru - Experienced User
Ya, tons of correctables and un-correctables that should be mostly zeros.
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.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/ - KitsapMay 29, 2025Master
Info as requested. Looks like an awful lot of errors...
Yes, but you cut off the part that would provide more of a complete picture. Such as the system up time. The correctable/uncorrectable values accumulate over time and reset to zero when your modem is rebooted. With the information you provided, no one knows the time frame.
- EverymanTooMay 30, 2025Tutor
I don't see an uptime stat on the report generated by the CM2050V. I see it in the cable modem stats on the C7100V, which is currently online (for 114 hours of Up Time, it shows errors in the low thousands on downstream channels 1-16 and does not provide error counts on upstream channels. The CM2050V is not online at present. When I try again next week, I'll try to get more useful info. Sorry about that. Thanks again.
- FURRYe38May 30, 2025Guru - Experienced User
Also please post the firmware version on the CM modem.