Firmware: v2.02.04S.no: 5FV30577A110Dmodel: CM1150V Just bought this model to replace Xfinity modem. This modem is extremely slow and its get slower in afternoon and night. I connected directly to modem and getting Upload 19.31 Mbps and Download 24.43 Mbps. Is there something i need to do or just return this modem...

Hi Furrye38,I have done those setup already. Xfinity send config file twice but no luck. talk with Netgear tech and i ran fluke from Coexial cable to other line, there wan't any noise. Netgear tech send me another modem. I hooked up and ran speed test, it was about gig upstream and 50 down. It was faulty modem. I just replaced with new one..

cm1150v slow with xfinity | NETGEAR Communities

3 Replies

FURRYe38
Guru - Experienced User
Oct 06, 2020
Have the ISP check the signal and line quality UP to the modem.
Be sure the ISP sends the configuration file and 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 them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
- orion651
  Aspirant
  Oct 14, 2020
  Hi Furrye38,
  I have done those setup already. Xfinity send config file twice but no luck. talk with Netgear tech and i ran fluke from Coexial cable to other line, there wan't any noise. Netgear tech send me another modem. I hooked up and ran speed test, it was about gig upstream and 50 down. It was faulty modem. I just replaced with new one..
  - FURRYe38
    Guru - Experienced User
    Oct 15, 2020
    Glad a new modem fixed it.
    Enjoy. :smileywink:

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cm1150v slow with xfinity