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Alpha1991's avatar
Alpha1991
Aspirant
Jun 14, 2023

CM1000v2 modem with slow speeds of 480mbps

I have been using my CM1000v2 Modem for the past six months. My plan with xfinity is 1200 Mbps. I recently gotten in contact with them and they send an electrician over. They fixed an issued on the outside but still have no more than 480-560 Mbps. I spoke to a rep online and she did all types of test and she tells me is my modem. While, I am still trying to figure out what happen. It has been going like this for the past 3.5 weeks. I usually get around 850-980 Mbps but this is by far less. Xinifty said is my modem, but I see there is a problem.

27 Replies


  • Alpha1991 wrote:
    I have been using my CM1000v2 Modem for the past six months. My plan with xfinity is 1200 Mbps. I recently gotten in contact with them and they send an electrician over. They fixed an issued on the outside but still have no more than 480-560 Mbps. I spoke to a rep online and she did all types of test and she tells me is my modem. While, I am still trying to figure out what happen. It has been going like this for the past 3.5 weeks. I usually get around 850-980 Mbps but this is by far less. Xinifty said is my modem, but I see there is a problem.

    What is the brand name and model number of the router you have connected downstream of your CM1000v2?

     

    Do you have a PC with an Ethernet port you can connect directly to your CM1000v2 for testing?

     

    If yes, use the Ookla installable test application on the PC.  Power down your modem and the PC.  Power up your modem and give it plenty of time to boot and stabilize.  Connect the Ethernet to your computer and boot your computer.  Be patient, it might take a few minutes for your PC to get an IP address direct from your ISP.

    • Alpha1991's avatar
      Alpha1991
      Aspirant
      What is the brand name and model number of the router you have connected downstream of your CM1000v2?

      I am a bit confused by this, what do you mean? I thought that was private information. Sorry! New to all of this. I will send out what router log said.
      • Kitsap's avatar
        Kitsap
        Master

        Alpha1991 wrote:
        What is the brand name and model number of the router you have connected downstream of your CM1000v2?

        I am a bit confused by this, what do you mean? I thought that was private information. Sorry! New to all of this. I will send out what router log said.

        Just exactly what it says.  You are complaining about the throughput performance of a cable modem, CM1000v2.

         

        Downstream of that modem you should have a router of some unknown brand name and unknown model number that you connect to some unknown device where you are testing performance.  Difficult to provide assistance without knowing what hardware is connected in the data stream path.

         

        When you say send out what router log said, nothing is found.  Where did you send it?