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976Monkey's avatar
976Monkey
Aspirant
Sep 20, 2018

CM700 suddenly has slow internet connection speeds

My internet connection is running very slow, to a stand still. I’m using the apple airport extream for a router which is working fine, but the modem seems to be giving issues. Checked the firmwear and it’s the latest recommended, but speeds are as slow as 2.4mbps on multiple speed tests. I had Comcast come round and the wiring all checks out, after a reset the modem was working again but the speeds go from 180mbps on the WiFi back to 2.4ish. Any ideas or do I need to change my modem?
Hardware
Troubleshooting

5 Replies

    • DarrenM's avatar
      DarrenM
      Sr. NETGEAR Moderator
      Sep 25, 2018

      Are you able to post the modem logs and the power levels?

       

      DarrenM

    • vkdelta's avatar
      vkdelta
      NETGEAR Employee Retired
      Sep 25, 2018

      your RF line is noisy. If you see your downstream, you have tons of uncorrectables. Over 200,000 on some channels. This will impact performance and it needs to be fixed.

       

      In home wiring: Either you have bad cable, bad connector or bad splitter in your home.

      Outside wiring:Get your ISP to check the noise and replace the cables if necessary

      • 976Monkey's avatar
        976Monkey
        Aspirant
        Sep 26, 2018
        Thanks for the suggestions, but your not correct. I had Comcast out and they checked all the wires and re-ran the internal wire, changed connection points and checked the remaining wires. Modem started running normal for about a minute then same thing. I ended up buying another modem and the issue went away, now all is running correct, not really happy that my Netgear didn’t last that long (little over a year). Time to look at other options maybe.