DOCSIS 3.1 cable modems are still developing across the country. However, some businesses and even some households are using DOCSIS 3.1 technology today. If you subscribe to Gigabit plans such as XFINITY 1 Gig or Gigabit Pro, Cable One GigaOne, or Mediacom Xtream Gig, you’ll need a DOCSIS 3.1 compatible cable modem. Some may be offered only through your cable company. However, some companies may let you buy your own modem.

XFINITY DOCSIS 3.1
Comcast XFINITY Modems DOCSIS 3.1 Gigabit Modems List

NETGEAR Nighthawk CM2000 Multi-Gig DOCSIS 3.1  Modem

NETGEAR Nighthawk CM2000 Multi-Gig Cable Modem
  • ​Supports cable tiers up to 2.5 Gbps / 2500 Mbps
  • Fastest – Perfect for 4K HD streaming, intense multi-player gaming, and more
  • Compatible with DOCSIS 3.0 Internet tiers
  • Best buy for near and far future network upgrades
  • Not compatible with voice services
  • Compatible With – Comcast Business, Comcast Xfinity, Cox, Grande, Mediacom, Optimum, RCN, Sparklight, Spectrum Residential, and WoW!
  • Nighthawk Multi-Gig Eco System support. Works best with the RAX120, RAX200, and Orbi RBK852 and future routers with 2.5Gbps WAN Port.
  • View more information on the NETGEAR CM2000 on Amazon

FAQ About DOCSIS 3.1 Cable Modems

What is DOCSIS 3.1?

DOCSIS is short for Data Over Cable Service Interface Specifications. Over the years there have been different forms of DOCSIS, from 1.0 to 3.0, and now DOCSIS 3.1. Each of the previous offers faster and faster speeds. With 3.1, the goal is to get to 10 Gbps download speeds. Can you imagine that? Being able to download a UHD movie in about a second. That’s what we are heading towards. As we begin to use the internet for more things like virtual reality, augmented reality, and artificial intelligence, higher speeds, and availability will definitely be needed.

Do I need a DOCSIS 3.1 cable modem?

Some cable companies offer Gigabit speeds and this typically is what a DOCSIS 3.1 cable modem is for. However, if you want to prepare for the future, all DOCSIS 3.1 modems can be used on 3.0 networks. This makes them usable on lower speed tiers than Gigabit.

Is there a DOCSIS 3.1 cable modem and router combo, a.k.a WiFi cable modem?

Yes, currently the one listed above is the only one available in retail.

Is a DOCSIS 3.1 modem worth it & Do I need one?

The answer depends on your provider, current speed subscription, and any future speeds you may elect. There is not a “catch-all” answer to these questions for everyone. Let’s say you currently subscribe to XFINITY Extreme 300. The CM500 DOCSIS 3.0 modem is capable of 300 Mbps and is typically around $55-$60. An ARRIS SB8200 DOCSIS 3.1 modem capable of 300, and well above to 1 Gbps (1000 Mbps), will cost around $150. So you have to think about $100 savings. However, you should also consider that any 3.1 modems would be future-proof for many years to come. A 3.0 modem may be good for another 4-5 years before all companies roll-out 3.1 across their networks and stop using 3.0.


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