optimum cable modems 2021

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. See below for WiFi Modems.

NETGEAR / Optimum Cable Modem CM600

Optimum Speed Tiers

Depending on your location, the available package names and speeds may differ.

  • Optimum 10 (10 Mbps down)
  • Optimum 60 (60 Mbps down)
  • Optimum 100 (100 Mbps down)
  • Optimum 200 (200 Mbps down)
  • Optimum 300 ( 300 Mbps down)
  • Optimum 400 (400 Mbps down)

Best WiFi Modem For Optimum By Altice

This WiFi modem is compatible with Optimum services. It has 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 WiFi Cable Modem

Optimum Voice Cable Modem eMTA

Currently, this is the only retail voice compatible modem available. 

Optimum Voice Cable Modem
Optimum Voice Cable Modem


Avoid These Modems

Contrary to what other sites may tell you, the following modems DO NOT work with Optimum services. This is based on ratings, reviews, and other information relating to the poor operation of these modems. This includes modems affected by the bad Intel Puma 6 chipset which has caused a tremendous amount of headaches.

  • ARRIS SURFboard SB6190
  • ARRIS SURFboard SBG7580AC
  • Linksys CM3024

The NETGEAR CM700 is not approved for use by Altice Optimum. Anyways, the CM700 should also be avoided at all costs due to it being built with the poor Intel Puma 6 Chipset. This Chipset has caused a lot of latency issues. The Puma 6 Chipset is even the subject of a class-action lawsuit. It is contained in all 4 of the models as well.

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.

Associated Altice / Optimum Items


Altice Amplify – High-Fidelity TV Smart Speaker with Sound by Devialet, Alexa Voice Control, Bluetooth and Wireless Streaming
Cablevision UR2-CBL-CV04 Universal Remote Control
ALTICE Remote Control with Bluetooth, Speech, and Netflix Button Batteries Included
OPTIMUM CABLEVISION Remote Control DVR W/Batteries & Instructions

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.

Optimum Modem Setup

 What Do You Think About This Page? 

Your feedback is very important to us. We use it to enhance the information here for others. Please feel free to leave questions or comments below.


Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.