Year-End SaleEnds 1/1/26. Limited quantities. No rainchecks.

Main Content
product image

ARRIS - SURFboard 8 x 4 DOCSIS 3.0 Voice Cable Modem

Model: TM822R
SKU: 5839004
This item is no longer available in new condition. See similar items below
  • Key Specs
    • Internet Service Provider (ISP) Compatibility: XFINITY from Comcast (The internet service provider(s) that the device is able to work with and/or connect to with minimal setup.)
    • DOCSIS Certification: 3.0 (DOCSIS (Data over Cable Service Interface Specification) is a telecommunications standard that allows high-bandwidth data transfer via a coaxial cable for internet access. Each version updates the previous standard and is backwards compatible with other versions.)
    • Downstream Data Speed: 343 megabits per second (The maximum speed at which data is downloaded from the internet.)
    • Channel Bonding: 8 x 4 (The process of combining adjacent channels within a given frequency band to deliver faster broadband speeds. Channel bonding combinations are indicated as "downstream x upstream" e.g. 16x4 (16 channels dedicated for downloading data and 4 channels for uploading). The more channels, the more network traffic the device can support.)
    • Number of LAN Ports: 1 (Number of devices able to be connected to the Local Area Network (LAN). LAN ports allow wired connections to other networking devices (wireless access points, range extenders, etc.) in order to share the internet connection received through a WAN port.)
  • General
    • Product Name: SURFboard 8 x 4 DOCSIS 3.0 Voice Cable Modem
    • Brand: ARRIS
    • Model Number: TM822R
  • Certifications Listings & Approvals
    • DOCSIS Compliant: true
    • ENERGY STAR Certified: false (Devices carrying the ENERGY STAR service mark, such as computer products and peripherals, kitchen appliances, and other products, generally use 20% to 30% less energy than required by federal standards.)
  • Features
    • Auto Connect: true
  • Speed
    • Gigabit Ethernet Speed: true (Supports the gigabit Ethernet networking standard, which has a data rate of at least one gigabit per second, or 1,000 Mbps.)
  • Compatibility
    • System Requirements: CPU: P4, 3GHz, RAM 1GB, Hard drive 7200 RPM, Ethernet Gig-E (1000BaseT) (The software that a product must have for it to be able to integrate with another product.)
  • Dimensions
    • Product Height: 7 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Length: 2 inches (The out of box length of the item. Length is measured as the longest dimension of the item.)
    • Product Width: 8.5 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Weight: 2.4 pounds (The out of box weight of the item.)
  • Warranty
    • Manufacturer's Warranty - Parts: 2 years
    • Manufacturer's Warranty - Labor: 2 years
  • Other
    • Modem Type: High speed
    • UPC: 612572213858

Enjoy smooth Internet surfing and VoIP calls with this ARRIS SURFboard cable modem. Its DOCSIS 3.0 technology with eight download and four upload channels provides up to 343 Mbps of data performance, and it has two voice ports for a dual-line telephony setup. The multiprocessor technology of this ARRIS SURFboard cable modem maintains stable Internet bandwidth and quality voice communication.

See other products that work with this Wi-Fi networking product

  • Gigabit Ethernet connectivity: For reliable, wired networking.
  • DOCSIS 3.0 technology: Features 8 x 4 channel bonding for download speeds up to 343 Mbps, so you can avoid rental fees from your cable and Internet service provider.
  • Compatible with XFINITY Voice & Internet Service: Certified to work with Internet provider Xfinity.
Whats Included
  • End User License Agreement
  • Ethernet Cable (CAT5e)
  • Power Cord
  • Quick Installation Guide
  • Telephony Modem
  • Wall-Mounting Template and Instructions

Q: is this modem supported by Cablevision? Can it receive a back-up battery (12 hours plus)?

A: Hey, Dave! The answer to your question is yes, this modem is compatible with Cablevision. As a matter of fact, I bought the ARRIS TM822R for that same reason. Cablevision began charging its customers for their modem and I have had it with them charging me a fee of $10.89 a month (that's $130.68 dollars a year). So I decided to buy my very own modem and not rent it anymore. As far as backup battery, this modem does not come with one included. But they are very inexpensive. Besides, I don't think you would be needing one, the power never goes down here in the city. The modem is easy to set up. Your web-browser will prompt you to enter your Cablevision account information, and to restart your computer at-least two times, after this, you should be up and running. The modem is fast; I've had it for a month now and I have no complaints. One last thing, don't freak out if at first your browser doesn't recognize that you have a new modem, just, restart your PC, and wait for all the lights on your new modem are solid green. If it doesn't happen, disconnect your computer and modem for 30 seconds and that should do it; begin your registering process (Your name, your modem model number, and account number, that's all they ask for). Good luck with your new modem! If you decide to buy it. ;)

Q: Is this mdoem compatible with Comcast cable and telephone

A: Yes I have xfinity in Colorado and it works great. Easy to set up and saves on rental fees

Q: Does it work for internet provided by Optimum

A: I have Cablevision optimum TV, internet and telephone service in Nassau County and I set this modem up yesterday and it worked fine. I disconnected the old modem, connected this one, then called their tech support. The tech support added this modem to my account and my TV, internet and telephone worked fine. I took the old modem to Cablevisions optimum store and returned it.

Q: I need a modem with a voice/phone-jack for my phone. This is the only one BestBuy offers with a phone jack (or two). Will this modem replace the rental from TimeWarner/Spectrum without regrets. I do have a WiFi router ready for a modem.

A: I just bought my own voice modem and during setup was told by Spectrum that they do not allow you to use your own modem for voice. This seems unfair, but that was the answer from their techs.

Q: Is it compatible with Spectrum cable (former Time Warner Cable)? Currently I have rented model Arris TM1602. Is this modem better or compatible as far as speed?

A: Simply call your cable provider and ask them to email you a list of compatible modems. I called Optimum and told them that I wanted to buy my own modem and avoid the perpetual $4.95 monthly modem charge. They sent me the compatible list and then I called them back with the serial number (MAC #) of the modem I purchased through Best Buy, and they programmed it into their system. Very easy. I went to best buy with pictures I took of my modem with my cell phone, and they checked which modem was most compatible on the list. Just beware that Best Buy will price match the modem if you can find it on-line at a cheaper price, ONLY if it is not a third person supplier.

Q: Does this modem have a phone jack as I have to have a phone service modem. Thank you

A: yes it does. this modem is whats called a telephony modem; meaning capable of bringing landline phone service.

Q: Does this have the CMAC # on the bottom just to know if it works with optimum?

A: It works with Optimum. Connect it first, then call Optimum with the CMac number. They will register the new modem and get it running.