Your coupon has been activated.
Up to 45% off Dining Room Furniture* Up to 65% off Jewelry & Watches* Up to 70% off Select Area Rugs* Up to 25% off Select Bedroom Furniture*

Motorola SURFboard SB6121 Cable Modem

The Rewards Program that Pays for Itself
  • EARN 5 to 40%
    Earn 5% in Club O Rewards on every order & up to 40% on select items.
  • FREE SHIPPING Every Order, Every Day*
    No matter how big or small, your order always ships for free.
  • VIP ACCESS
    Dedicated customer service and early access to exclusive deals.
  • RISK FREE
    Club O pays for itself, or we make up the difference
Today: $110.37
Very High Sellout Risk
Free Shipping*
  • Delivery Estimate

    Select a Product Option to view shipping

    • Product Alerts

      Stay in the know! Choose which alerts you’d like to receive on this product.

    Motorola SURFboard SB6121 Cable Modem
    CHOOSE A LIST
    • Wishlists
    • Save for Later

    Motorola SURFboard SB6121 Cable Modem - 1 x Network (RJ-45) - F-type - 222.5 Mbps Broadband - Gigabit Ethernet, Fast Ethernet - Desktop

    Technical Specifications

    • Description
    • General Information
    • Technical Information
    • Interfaces/Ports
    • Media & Performance
    • Network & Communication
    • Physical Characteristics
    • Miscellaneous

    Motorola SURFboard SB6121 Cable Modem

    Description
    Description

    Your customers want high-bandwidth data and multimedia services. Our easy-to-use SB6121 SURFboard eXtreme Cable Modem helps you deliver. Harnessing the power of DOCSIS 3.0, the SB6121 enables channel bonding of up to four downstream channels and four upstream channels-so you can offer your customers advanced multimedia services with data rates of more than 100 Mbps in each direction.

    Strengthen your broadband leadership. Count on the Motorola SB6121 to help you deliver innovative, ultra-broadband services to your premium customers.

    General Information
    Manufacturer Motorola, Inc
    Manufacturer Part Number 575319-019-00
    Manufacturer Website Address http://www.motorola.com/us
    Brand Name Motorola
    Product Line SURFboard
    Product Model SB6121
    Product Name SURFboard SB6121 Cable Modem
    Product Type Cable Modem
    Technical Information
    Modulation 8QAM
    Interfaces/Ports
    Host Interface RJ-45
    F-type Yes
    Network (RJ-45) Yes
    Number of Network (RJ-45) Ports 1
    Media & Performance
    Broadband Transmission Speed 222.5 Mbps
    Network & Communication
    Ethernet Technology Fast Ethernet
    Network Standard 10/100/1000Base-T
    Physical Characteristics
    Form Factor Desktop
    Height 5.2"
    Width 5.2"
    Depth 1.7"
    Weight (Approximate) 1.35 lb
    Miscellaneous
    Additional Information
    • Offers innovative, high-bandwidth data and multimedia services to customers
    • Backward-compatible to DOCSIS/EuroDOCSIS 1.x and 2.0
    • DOCSIS 3.0-certified (EuroDOCSIS 3.0-based)
    • Channel bonding of up to 4 downstream and 4 upstream channels 1 GHz capable tuners
    • Supports IPv4 and IPv6 to expand network addressing capabilities
    • Enhanced security: supports Advanced Encryption Services (AES) traffic encryption
    • Remotely configurable and monitorable using SNMP and TFTP

    Operating Systems:

    • Windows 7
    • Windows Vista
    • Windows XP
    • Windows 2000
    • Linux
    • Mac OS 9 or Higher
    Green Compliant Yes
    Green Compliance Certificate/Authority ENERGY STAR

    Customer Reviews


    5 Stars
    12
    4 Stars
    0
    3 Stars
    1
    2 Stars
    0
    1 Stars
    1
    • Set up took less than a minute, no more leasing

      Took less than a minute to get it up and running. Has not had any other issues the Comcast equipment is notorious for.

      Read More
    • great modem!

      Needed to replace my aging Motorola surfboard modem, and wanted to replace it with a product I know to be reliable. This modem was so easy to install, and a very good value. I'm very happy with this modem and would recommend it to anyone.

      Read More
    • I thought what I had was fast...this is SUPER fast

      My modem I was renting from the cable company at $60/year at 10 years I thought was OK at 36 Mbps as far as speed, but today with more WiFi devices in your home this 160 Mbps is super FAST. The router lets you know when it is operating in Ethernet or Fast Ethernet mode OR in high-speed Gigabit Ethernet mode. I have seen a HUGE difference in speed alone uploading my data into the cloud.

      Read More
    • Motorola SURFboard SB6121 Cable Modem

      Bad unit. Asking to return it. Return takes too long. I need to have a replacement sooner than 10+ days.

      Read More
    • Stopped paying for rental modem

      At a lower price than retail, this has turned out to be a great buy. I think the data transfer is quicker than the rental unit. A wireless router needs to be purchased separately. This is an approved device for Time Warner Cable.

      Read More
    • Does what it is suppose to do....

      I'm using the Motorola SURFboard SB6121 Cable Modem instead of renting a cable modem from Comcast (yes, this is an Comcast approved modem). My speeds from Comcast are the same if not a little better with this modem.

      Read More
    • Motorola SURFboard SB6121 Cable Modem

      So far so good. We have been using it for a week and nothing wrong so far !! I do feel like it works faster than the one we had from the company !!! Thanks Overstock !!

      Read More
    • Comcast compatible

      What can I say? Easy to install, took just a few minutes on the phone with Comcast to get it activated and saves me rental fees. I'm happy.

      Read More
    • Great modem, super fast

      I just love this super fast modem. Its been a few months now since i got it and its totally dependable and super fast. Its been working day and night with no problems since I recieved it...super fast with high response. I highly recommend this modem to anyone looking for new technology. Works great.

      Read More
    • Cable Modem

      Modem works as advertised at great price. Very please with this purchase.

      Read More

    Questions & Answers

    Get your product questions answered right here.
    Guidelines
    • dose this work with Mediacom?

      Guidelines
      • Hello, the Motorola SURFboard SB6121 Cable Modem should work with Mediacom without problem. If you have any additional questions please feel free to let us know. Thank you for shopping with us!

    • does this model work with Cox ?

      Guidelines
      • Hello tfazz, the Motorola SURFboard SB6121 Cable Modem will work with Cox. Please feel free to contact us again with any further questions. Thank you for shopping with us!

      • Works with Cox. I just had to call and refresh the signal.

      Read more Read less
    • what comes with this modem? Cord? battery backup?

      Guidelines
      • Hello thresher593, The Motorola SURFboard SB6121 cable modem does not Contain a battery but it does come with the cord. Please feel free to contact us again with any further questions. Thank you for shopping with us!

    • is this Motorola SB6121 cable modem sold at O.co a new modem or used/refurbished?

      Guidelines
      • Thank you for your inquiry regarding the Motorola SURFboard SB6121 Cable Modem. This is a new item. I hope this information helps you.

    • do you still need a router for wireless or for use with comcast?

      Guidelines

    Shopping Guides

    Shipping & Returns

    Shipping:

    Usually leaves our warehouse in 1-2 business days. *

    Standard Return Policy for Electronics:

    The items must arrive at our warehouse within 30 days of purchase. You must return items in their original condition to qualify for a full refund. We will issue a partial refund of up to 70 percent if returned items have been opened, used, or returned late. More Details

    Shipping Information:

    Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
    Standard shipping details
    Expedited shipping details

    * For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

    ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.