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Forum Discussion
Downstream Flashes
Downstream starts flashing every couple of weeks. Only have 1/5 internet speed, then eventually no internet when this happens. Reboot used to work, not anymore. Attached are modem logs. Let me k...
Power levels are all over the place and some channels are too high:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
All channels should be with in 3db of each other.
You have lots of correctables and un-correctables that should be mostly zero.
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://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
Here is the chain up to modem---> ISP coax coming out of ground is connected directly to rg6 coax, which is run through wall and connected directly to modem (no connector plates.).
1. Can the modem be the problem?
2. Can length of coax be the problem?
Thanks again for any help!
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly. Have them review the logs you posted here and the info included here in this thread.