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Motorola SURFboard Cable Modem SB6121 - DOCSIS 3.0 200 Series
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Motorola SURFboard Cable Modem SB6121 - DOCSIS 3.0 200 Series
US $45.00US $45.00
Sat, Jun 21, 12:10 PMSat, Jun 21, 12:10 PM
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Motorola SURFboard Cable Modem SB6121 - DOCSIS 3.0 200 Series

US $45.00
ApproximatelyC $61.58
Ends in
or Best Offer
Condition:
Used
Ended: Jun 21, 2025 12:10:22 EDT
    Shipping:
    US $9.39 (approx C $12.85) USPS Ground Advantage®.
    Located in: Clearwater, Florida, United States
    Delivery:
    Estimated between Mon, Jul 14 and Fri, Jul 18 to 91768
    Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. Delivery times may vary, especially during peak periods.
    Returns:
    No returns accepted.
    Payments:
         Diners Club

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    eBay item number:157096315958

    Item specifics

    Condition
    Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is ...
    Maximum Downstream Data Rate
    172 Mbps
    Maximum LAN Data Rate
    1000 Mbps
    Color
    Black
    Custom Bundle
    No
    Ports
    Ethernet (RJ-45)
    To Fit
    PC
    California Prop 65 Warning
    N/A
    DOCSIS Standard
    DOCSIS 3.0
    Modem Device Type
    Cable Modems & Routers
    Manufacturer Warranty
    None
    Model
    SB6121
    Connectivity
    Single Ethernet (RJ-45) Port, Wired-Ethernet (RJ-45)
    Features
    For Gaming, Unlocked
    Carrier
    Unlocked
    Country/Region of Manufacture
    China
    Number of LAN Ports
    1
    UPC
    0612572191798

    About this product

    Product Information

    Enjoy lightning-fast broadband speed and safer web surfing with the Motorola SURFboard eXtreme (SB6121) 222.64 Mbps Modem from Arris. Thanks to a download speed of up to 160 Mbps in Docsis 3.0 mode, you can enjoy a range of Internet activities without getting frustrated about all the lag times and speed-related glitches. Using up to four channels, the cost-effective Arris Motorola SB6121 Surfboard Docsis 3.0 cable modem delivers on fast broadband speed for better user experience when playing online games, streaming HD videos, shopping, video conferencing, making high-quality free VOIP voice calls, downloading huge files, or running peer-to-peer networking applications. Enjoy your games, movies, and video calls all in real-time. Save money by conserving energy when your Motorola SB6121 surfboard Docsis 3.0 Extreme is not in use by switching on the power-saving mode. Set up is quick, easy, and hassle free. User-friendly diagnostics allows you to configure your modem correctly and check on net service disruptions. Ensure that your new cable modem supports DOCSIS 3.0, the current iteration of the Data Over Cable Service Interface Specification that governs how cable operators deliver high-speed Internet. You also need a cable modem that is compatible with the major cable ISPs in the U.S., including Time Warner, Comcast, Cox, and Charter. The Motorola SB6183 is compatible with nine of the ten U.S. cable Internet providers. The Arris Motorola SB6121 Motorola SURFboard DOCSIS 3.0 and SB6141 are both models that are rock-hard performers, with the SB6121 being the cheaper of the two. Both cable modems offer the kind of performance that finds favor with tech gurus and small business owners. The SB6121 is a master when it comes to Internet applications and fast transfer rate, which allows for faster Internet access. This model also features IPv6, which allows you to get to a larger number of newly emerging IP addresses. The SURFboard DOCSIS 3.0 woos the crowd with its high-performance technology, which allows for faster access to big data. The DOCSIS also gains high scores for its ability to handle strong traffic encryption, allowing for increased privacy and protection of your personal information while surfing and shopping online. Its cable compatibility makes for a hassle-free connection to your cable ISP, and it is compatible with Time Warner. The SURFboard model also features a 134.14 Mbps transfer rate, which allows faster web speed, while its DOCSIS 3.0 technology allows you to quickly read and write from your device. The Motorola SB6121 modem is a wired network adapter and does not offer wireless access. For that, you would need to connect the cable modem to a wireless router and adjust your network setup. You may consider purchasing the retail packaging that offers three products in one: a DOCSIS 3.0 Cable Modem, Dual-Band Concurrent 802.11ac Wi-Fi Access Point, and 2-Port Gigabit Ethernet Router. This works well with Linux, Mac, PC, and Unix computers. The Arris Motorola SB6121 SURFboard Docsis 3.0 cable modem is three times faster than wireless and has Wi-Fi speeds up to 1800 Mbps. The package offers preset Wi-Fi security amd energy-efficient Ethernet. The Motorola SB6121 modem continues to enjoy high scores in reviews for computers and accessories software.

    Product Identifiers

    Brand
    Motorola
    MPN
    SB6121
    UPC
    0612572191798
    Model
    SURFboard eXtreme
    eBay Product ID (ePID)
    112151470

    Product Key Features

    Type
    Cable

    Dimensions

    Depth
    1.65in
    Height
    5.24in
    Width
    5.24in

    Additional Product Features

    Data Transfer Rate
    222.64Mbps
    Platform
    M·A·C, Linux, PC Products, UNIX
    Enclosure
    External
    Hardware Interface
    RJ-45, Ethernet
    Transmission Line
    Cable
    Network Ports
    RJ-45
    Brand Website
    http://www.motorola.com/Video-Solutions/US-EN/Products-and-Services/Voice-and-Data-Consumer-Premise-Equipment/DOCSIS-Modems-Gateways-and-eMTAs/Cable-Modems/SURFboard_SB6121_US-EN

    Item description from the seller

    About this seller

    lanabratt

    100% positive feedback94 items sold

    Joined Oct 2010

    Seller feedback (32)

    All ratings
    Positive
    Neutral
    Negative

    Product ratings and reviews

    4.6
    252 product ratings
    • 199 users rated this 5 out of 5 stars
    • 33 users rated this 4 out of 5 stars
    • 7 users rated this 3 out of 5 stars
    • 2 users rated this 2 out of 5 stars
    • 11 users rated this 1 out of 5 stars

    Easy to set up

    Good value

    Performs well

    Most relevant reviews

    • Top favourable review

      Compact size, Works fine

      This modem arrived in thin packaging, no padding, no box, but included all necessary parts and nothing was damaged. The plastic housing looks lightly scratched all over as if it had been cleaned with a gritty cloth. But it works perfectly and was incredibly easy to set up. I called Time Warner to activate it and within a few minutes I was all set to return the leased modem and recoup the cost of this used unit in three months. To save money I switched to the slowest internet plan and have no problems streaming Netflix with the 1.5 mbps plan (note the decimal - that's one-and-a-half mbps, not fifteen) - For older people living alone on a limited income, buying a cheap used modem like this is a good investment.

      Verified purchase: YesCondition: Pre-OwnedSold by: surpluscablesupplys

    • Top critical review

      Modem sucks and you might have to buy 2 or 3 a year

      Necessary evil!. I bought my own modem so I don't have to pay Comcast $10 a month. This is my 3rd modem. Even if you buy brand new these keep breaking down. This is a scam that is a partnership with Motorla, Aris and the providers.

      Verified purchase: YesCondition: NewSold by: twintwist

    • Had to call Comcast to activate but it works great. Only issue was that power supply fell apart during shipping; 12V 1 Amp is generic enough. Happy.

      The product is perfect for getting saving some green from Comcast rental fees. It will be many years before they roll-out DOCSIS 3.1, make it affordable enough after they do and available. So in the mean time, save money on your monthly bill. This one works great for the 50mb ish speeds.

      Verified purchase: YesCondition: Pre-OwnedSold by: xiayuanhuan

    • If is what it is, and it does what it does.

      The Motorola SB6121 is a reasonably small DOCSIS 3.0 cable modem. It can handle data rates up to a nominal 200Mb/s (actual 195Mb/s), and can work with most cable providers (check compatibility before buying). This model does not incorporate a router. Setup is simple - connect the cable cord, the Ethernet cord, and power and you're away. Setup with the cable company was simple - one phone call, read one number, and the new modem was working. One irritation with a cable modem (as opposed to a modem-router) is that if you connect a different computer/router/etc, you have to power cycle the modem. All in all, this has been a great deal for me, eliminating the modem rental and other fees . Now I just have to see if it lasts.

      Verified purchase: YesCondition: Pre-OwnedSold by: speedy-ship

    • Very easy to use

      The product is plug and play. Only thing to do is call Comcast and tell the numbers that are on the back of the modem. They asked me if I will be using a router to have it ready as well. So I connected during the process that took less tan a minute and it is working perfect. I was looking to the perfect match and most of the people recommended to use a router Netgear WNDR3700 that is very reliable and I can confirm this as well.

      Verified purchase: YesCondition: Pre-OwnedSold by: crossedarrowscommemoratives