Optimum / Cablevision Cable Modems

See this before buying a cable modem for Optimum. After lengthy research, we found these modems to be compatible with Altice One services Optimum and formerly Cablevision. There is no official list of approved modems provided by Altice. They just state on their website that “There are many DOCSIS modems that will work.” However, not just any DOCSIS modem will work. Use the guides below to find the most compatible cable modem for your services and speeds. Customers who have the Altice One cable box should not order their own modem. The Altice One provides for the Internet as well as TV and some other features all in one unit.

Best Modems For Optimum By Altice

These cable modems do not have WiFi or Voice abilities. They would have to be used with a separate WiFi router.


  • For Tiers Up To 400 Mbps
  • 16 Download Channels
  • Read More – MB7420


  • For Tiers Up To 400 Mbps
  • 16  Download Channels
  • Read More – SB6183

Best WiFi Modems For Optimum By Altice

These are WiFi modems that are compatible with Optimum services. They have a built-in WiFi router so no other piece of equipment is necessary.


  • For Tiers Up To 400 Mbps
  • 16 Download Channels
  • AC1600 WiFi / 4 LAN Ports

Optimum Voice Cable Modem eMTA

Currently, this is the only retail voice compatible modem available.  It should only be purchased directly from ARRIS.


  • ​Two Voice Ports
  • For Tiers Up To 400 Mbps
  • 16 Download Channels
  • Use With A Separate Router
  • View More On ARRIS.com

FAQ About Optimum Cable Modems

What is the best compatible cable modem for Optimum by Altice?
There really isn’t a better one. It depends on the Optimum service tier and options you’d like included such as WiFi or Voice. As a stand-alone cable modem (no WiFi or Voice) for tiers up to 400, we recommend the Motorola one described above.

Can I use my own modem for phone service with Optimum?
Yes. Currently, there is only one supported model available in retail that’ll work. It’s listed above and should only be purchased new from ARRIS.

What is Altice One?
The Altice One is a cable box, cable modem, WiFi Router, streaming player, and phone box all in one unit. Customers can expect to pay $20.00 extra every month for using this equipment from Optimum. However, you can elect to use your own Internet equipment as listed above.

How much does Optimum charge a month for a modem?
That depends on which model you lease. You can expect to pay up to $10 a month, month after month.

How To Activate Your New Optimum Cable Modem

Review the following document to get your modem connected and setup. Then, visit https://install.optimum.com/JointInstall/ to add the modem to your account. Note – not all customers can use this method. You may have to contact Optimum support.

Optimum, Altice, and Cablevision names and their respective logos are properties of CSC Holdings. We have no direct relationship with either company.