Arris CM820A DOCSIS 3.0 Cable Modem

Rated 4.45 out of 5 based on 22 customer ratings

Compatible with Xfinity by Comcast, Spectrum / Time Warner, Suddenlink, & More!
DOCSIS 3.0 Modem with 8×4 Channel Bonding – Backwards Compatible With DOCSIS 2.0
Supports Internet Download Speeds up to 343 Mbps
WiFi not included – Wireless Router Sold Separately
1 Gigabit Ethernet Port to Connect to Computer or Router
NOT COMPATIBLE with Cox Cable

Description
Additional information
About brand
Shipping & Delivery

Arris CM820A Cable Modem Product Details

Name: Arris CM820A DOCSIS 3.0 Cable Modem
SKU: CMD033B
Price: 34.95 USD
Availability: InStock
Rating: 4.45 (22 reviews)

The ARRIS DOCSIS 3.0 8×4 Cable Modem CM820A features high speed data access to cable service subscribers for both home & business. The CM820 meets the productivity needs with the speed and performance found only in the 8×4 bonded channel cable environment along with industry-leading ARRIS reliability.

The CM820A offers data services at speeds over 300Mbps; competing with VDSL and fiber. Additionally, this modem provides a platform to deliver competitive high capacity commercial services to businesses.

Fast & Simple Internet with the Arris CM820A

Get ready to experience the Internet’s express lane! Whether you’re checking out streaming media, downloading new software, or checking your email, the Touchstone CM820 Cable Modem brings it all to you up to eight times faster than standard DOCSIS 2.0 cable modems.

The Arris CM820A Cable Modem provides an Ethernet connection for use with either a single computer or home/office Local Area Network (LAN)

Is the CM820 compatible with Comcast?

Yes! This model is compatible with Comcast Xfinity in most areas. Please contact your Comcast office or their customer service to confirm compatibility in your area with your service plan.

Does the Arris CM820A have WiFi?

No. This model is just a cable modem and only supports wired internet service. Click here to check out our list of routers that pair perfectly with this model!

Additional information

Weight	2 lbs
Dimensions	9 × 6 × 3 in
Additional Features	Energy-Efficient, HD Multi-Media Streaming, Static & Dynamic IP
Brand	Arris
Color	Black
Compatibility	Cox Communications, Xfinity by Comcast
WiFi Type	No Built-In WiFi
DOCSIS Version	DOCSIS 3.0
Ethernet Ports	1
Model Number	CM820A
Package Contents	Ethernet Cable, Modem, Power Cable
Wired Download Speeds	343 Mbps

About brand

Since 1997, when the first SURFboard was launched in Retail, SURFboard modems have been amongst the leading modems in the market and saving consumers money on their monthly rental fees. When you choose an ARRIS SURFboard, you’re joining a 60-year legacy of innovation from the company that invented digital TV and brought wireless Internet into the home with the first cable modem gateway. The same company that the world’s leading service providers choose to connect millions of people around the world to the Internet. Please note that some versions of this product will come with Motorola branding. This is due to a merging of Arris and Motorola a few years ago. While this does not affect the functionality of the product in any way, we feel it's important to mention.

Shipping & Delivery

Frequently Asked Questions

What is the return policy?

Return for a Refund:

Return for a refund on any order is permitted up to 30 days after your order arrives at the shipping address specified for your order. If you need to return your order, please contact us within the 30-day return period to request an RMA.

Return for an Expedited Replacement:

Return for a replacements are permitted up to 90 days after the date your order was marked as delivered at your shipping address. Please contact us to request one.

Wholesale Customers:

If you purchased your equipment wholesale from us in a large order and are in need of multiple returns/replacements, please contact us directly for assistance.

When will my order ship?

Most orders ship within 1-2 business days, but we’ll let you know if there’s any delay with your order as soon as we are aware of it.

Check out our Shipping & Delivery information page for more information.

I changed my mind after ordering. Can I still cancel?

We can process cancellations for orders that have not yet gone into transit. If you are interested in cancelling your order, please give us a call, or send us an email & we will cancel if we are able to.

Once an order has shipped, if you change your mind, simply email us & mark the unopened order as “refused” or “return to sender” when it arrives.

Check out our Shipping & Delivery information page for more information.

You can see each product's estimated arrival date during the checkout process. During checkout, you can choose an estimated arrival date from the options provided.

Entering your shipping destination ZIP code or allowing HazelNetworks.com to use your current location can result in greater accuracy for your estimated arrival date. Certain products may require additional days to process prior to shipping. This will be reflected in the estimated arrival date. If for some reason you don't receive your product, you may be eligible for a replacement product if you notify us during your return and exchange time period.

Delivery Guarantees

22 reviews for Arris CM820A DOCSIS 3.0 Cable Modem

Rated 2 out of 5

Mark in Seattle – April 21, 2017

This cable modem initially appeared to work well with Comcast. It then started to only intermittently forward DNS requests causing loss of Internet. I purchased a different cable modem (Motorola) and all is good again. The issue appears to be the software Comcast downloads into the box, as the rest of my setup (NetGear Wireless Access Point) works fine with both the Comcast rented CM and the Motorola.

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5 star	63	63%
4 star	22	22%
3 star	9	9%
2 star	4	4%
1 star		0%

Arris CM820A DOCSIS 3.0 Cable Modem

Arris CM820A Cable Modem Product Details