NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
CM700 Connection fluctuating between slow (10mbps) and normal (250mbps) throughout the day.
Model: CM700 DOCSIS 3.0
Firmware: V1.02.08
OS: Win 10
Home office/remote work
I've had this modem for about 1.5 years. For about 3 months it worked fine at my previous residence, until I moved to the current residence with all the same hardware setup. A few months into being at the current residence I started getting kicked off my work VPN numerous times a day. I could log back on immediately after so the connection wasn't dropping, but seemed to be slowing down very quickly and then spikes back up to normal speeds. Some days a few times per hour, other days 30+ times. I've had my ISP out about 4 times, and each time they've done something different including replacing the coax line from the box out back into the house and making changes at the main hub box upstream somewhere in the neighborhood. Each time the issue is resolved. For about 2-3 months, then it starts again. ISP says the connection looks find on their end and have basically said I need to upgrade to DOCSIS 3.1, but wanted to check if there was anything at the modem-level that could be causing it before I invest in another modem so soon. The firmware is up to date and the downstream/upstream numbers are all within expected ranges. Screenshots for reference.
2 Replies
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?
You have lots of Criticals and Correct and Un-Correcables that should be all zeros. ISP needs to look into this.
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.
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?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.htmlYou have line issues. high errors, unlocked channels, and issues in the logs.
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, bad/old/cheap connectors, or corroded connections. Replace them if you do or suspect there might be.
If you can, simply connect the modem right where the coax comes into the home. This prevents wiring in the home from being the issue. And some ISP’s charge if the wiring issue is in the home. So this helps prevent this.If that doesn't help, the isp needs to check the line.
