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Forum Discussion

Gunnerpunk's avatar
Gunnerpunk
Aspirant
Mar 23, 2023

CBR750 Slow upload speed

Hi, I just installed the AX4200 WiFi Cable Modem Router (CBR750) and I am getting the expected 600+Mbps download, but upload is only around 5Mbps when I was getting (and am paying for) 40Mbps with th...
plemans's avatar
plemans
Guru - Experienced User
Mar 23, 2023

Do you have a screensnip of the cable connections page and event logs? 

Gunnerpunk's avatar
Gunnerpunk
Aspirant
Mar 23, 2023

These all look to be from the time I was initially setting up the modem, possibly before the firmware updated:

Thanks for looking!

  • KevinLiT's avatar
    KevinLiT
    NETGEAR Moderator
    Mar 23, 2023

    Hello Gunnerpunk,

     

    Welcome to the NETGEAR Community!

    I understand that you are experiencing lower upload speeds than you originally expected. Please ensure that you are using the current FW version 4.6.14.4.  

     

    If you are not on the current FW please follow the instructions below to update your CBR750 Mesh System:

    How do I manually upgrade firmware on my Orbi router using orbilogin.com? | Answer | NETGEAR Support

     

    Please navigate to the link below to download the current FW for your CBR750 Mesh System:

    Orbi CBK753 | WiFi System | NETGEAR Support

     

    Best,

    Kevin

    Community Team

     

    • Gunnerpunk's avatar
      Gunnerpunk
      Aspirant
      Mar 24, 2023

      Yep, I mentioned in my original message that I am on the latest firmware.

      • KevinLiT's avatar
        KevinLiT
        NETGEAR Moderator
        Mar 24, 2023

        Hello Gunnerpunk,

         

        Thank you for verifying that information!

         

        I would like to endorse you to our support team to further troubleshoot your CBR750.

         

        Please PM the following information so I can endorse you to our support team:
        Name:
        Email:
        Phone Number:
        Device Model:
        Firmware:
        Serial Number:
        Preferred time to be contacted:
        App version:

        Please provide this information as soon as possible!
        I look forward to hearing from you!

        Best,
        Kevin
        Community Team

         

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Mar 24, 2023

    Power levels look good and no Correctables or Un-correctables. 

     

    However there are Errors, Criticals and Warnings that the ISP needs to look into and resolve. These indicate a modem side and line issue between the modem and ISP service box. 

     

    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