Forum Discussion

Wicked_Estilo's avatar
New Contributor

why is it that i need a docsis 3.1

why is it that i need a modem that supports 1G speed plus for an upgrade to 500mps? i have a netgear cm600 docsis 3.0 witch supports up to 960mps and i was told i needed to upgrade to the to the docsis 3.1. it makes no sense to me can anyone help?

3 Replies

  • dundee2002's avatar
    New Contributor II

    No reason to upgrade as long as the old modem works well now.

    • Dave9's avatar
      Contributor III

      They will require an upgrade to DOCSIS 3.1 for 500 Mbit plans and higher. There's no scam. Even though the manufacturer gives a huge speed number for that older modem, you never want to run a modem at more than 50% of its rated speed for various reasons. That's why they require the faster modem for a 500 Mbit plan. It's worth the upgrade anyway just to get the OFDM channel.

  • SharonL's avatar
    Former Moderator

    Thank you for reaching out to the Social Media Team. If you subscribe to Ultimate or Gigablast, then you need to upgrade to a DOCSIS 3.1 device to receive full download speeds. You can visit our site for Cox Certified Cable Modems at

    If you need further assistance, please reach us on Twitter at @CoxHelp, visit us on Facebook, or email us at Provide us the name on the account with the complete service address with a link to this thread so we can get started. Thank you.

    Cox Support Forum Moderator