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Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem

B&H # MOSB6121 Mfr # 575319-019-00
In Stock
Free Standard Shipping
Not eligible for free Expedited Shipping
Reg. Price: $79.95
Instant Savings: $10.96
Limited supply at this price
You Pay: $68.99
Product Highlights
  • DOCSIS / EuroDOCSIS 3.0 Certified
  • Compatible with DOCSIS 1.0 / 1.1 / 2.0
  • GigE Port w/ Auto Negotiate + Auto MDIX
  • Four Upstream / Downstream Channels Each
  • 10 / 100 / 1000 Base-T Ethernet Port
  • Internal Low Pass Filter
  • AES Traffic Encryption
  • Supports IPv4 and IPv6
  • User-Friendly Online Diagnostics
  • Windows, Macintosh, and UNIX Compatible

The SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem from Motorola is an easy-to-use option for home-businesses or large businesses alike, that provides high-bandwidth transfer rates for large multimedia files. It offers channel bonding of up to four downstream and four upstream channels, with data rates well above 100 Mb/s in both directions. While it is built for DOCSIS 3.0, it is of course backward compatible with 1.0, 1.1, and 2.0 standards.

With a 10 / 100 / 1000 Base-T Ethernet (RJ-45) port, and easy-to-read LED status indicators, the SB6121 is convenient to install with older technology, and its operational status is visible at a glance. For high-end residential users, workers with a home office, or even medium to large businesses, the SB6121 from Motorola is an excellent option that offers great performance and simplicity in a variety of applications.

DOCSIS 3.0
The SB6121 enables channel bonding of up to four downstream channels and four upstream channels, which allows an operator to offer their customers advanced multimedia services with data rates of well over 100 Mb/s in both directions
Economic and Flexible
The modem provides operators with an economic option for providing Ultra-Broadband services, with four times the current maximum user data throughput, approximating 160 Mbps in DOCSIS mode and 195 Mbps in EuroDOCSIS mode, without the need for hybrid fiber coax (HFC) plant upgrade
Enhanced Network Management
With the ability to provision and manage IP multicast, GigE (RJ-45) data port with Auto Negotiate and Auto MDIX, and user-friendly online diagnostics--the SB6121 has got the features to give you full-control over network management and maintenance
Backward Compatibility
Backward compatible to DOCSIS 1.0, 1.1 and 2.0, the SB6121 also supports both IPv4 and IPv6, Advanced Encryption Services, and all other DOCSIS 3.0 standards
Low Pass Filter
Internal Low Pass Filter to eliminate MoCA signal overload
Power Saving Energy Conservation Switch
This allows you to disable the modem when it is not in use (optional)
DOCSIS 3.0 Certified
Channel bonding of up to four downstream channels and four upstream channels increasing data rates of well over 100 Mbps in each direction. It supports IPv4 and IPv6 to expand network addressing capabilities, and also supports AE traffic encryption for enhanced security and protection
Operation Details
Modulation Downstream: 64 or 256 QA
Upstream: QPSK and 8, 16, 32, 64, 128 QAM
Bandwidth 100 MHz (edge to edge)
DOCSIS: ≤ 24 MHz
EuroDOCSIS: ≤ 32 MHz
Data Transfer Rate Downstream:
DOCSIS: 171.537 Mb/s (4 channels) / 42.884 (single channel) at 256 QAM at 5.36 Msym/s
EuroDOCSIS: 222.464 Mb/s (4 channels) / 55.616 (single channel) at 256 QAM at 6.952 Msym/s

Upstream:
DOCSIS: 131.072 Mb/s (4 channels) / 32.768 Mb/s (single channel): at 128 QAM at 6.4 MHz
EuroDOCSIS: 131.072 Mb/s (4 channels) / 32.768 Mb/s (single channel): at 128 QAM at 6.4 MHz
Symbol Rate Downstream:
DOCSIS 64 QAM 5.057 Msym/s; 256 QAM 5.361 Msym/s
EuroDOCSIS 64 QAM 6.952 Msym/s; 256 QAM 6.952 Msym/s

Upstream:
160, 320, 640, 1280, 2560, 5120 ksym/s
Level Range Downstream:
-15 to 15 dBmV

Upstream:
Level range per channel (Multiple Transmit Channel mode disabled, or only Multiple Transmit Channel mode enabled with one channel in the TCS)
DOCSIS/EuroDOCSIS:
TDMA:
Pmin to +57 dBmV (32 QAM, 64 QAM)
Pmin to +58 dBmV (8 QAM, 16 QAM)
Pmin to +61 dBmV (QPSK)
S-CDMA:
Pmin to +56 dBmV (all modulations), where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate


Level range per channel (two channels in the TCS)
TDMA:
Pmin to +54 dBmV (32 QAM, 64 QAM)
Pmin to +55 dBmV (8 QAM, 16 QAM)
Pmin to +58 dBmV (QPSK)
S-CDMA:
Pmin to +53 dBmV (all modulations), where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate

Level range per channel (three or four channels in the TCS)
TDMA:
Pmin to +51 dBmV (32 QAM, 64 QAM)
Pmin to +52 dBmV (8 QAM, 16 QAM)
Pmin to +55 dBmV (QPSK)
S-CDMA:
Pmin to +53 dBmV (all modulations), where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate
RF Specifications Bonded Channel RF Level Tolerance: 10dBmV
Input Impedance 75 Ohms (nominal)
Output Impedance 75 Ohms (nominal)
Frequency Range Downstream:
DOCSIS and EuroDOCSIS 108 to 1002 MHz (edge to edge), Optional 91 to 1002 MHz (edge to edge)

Upstream:
DOCSIS 5-42 MHz (edge to edge), EuroDOCSIS and optional DOCSIS 5 to 65 MHz (edge to edge)
Frequency Measurement Frequency Plan:
EuroDOCSIS Annex A
DOCSIS Annex B
J-DOCSIS Annex B, modified for Japan Frequencies
Security Security: DOCSIS 3.0 Security (BPI+, EAE, SSD)
Network Management SNMP v2 and v3
IP Interface Supports IP addressing using IPv4 and / or IPv6 (dual stack)
Compatibility PC: 90496, Pentium, or later; Windows Vista, 2000, XP or 7 or Linux with Ethernet connection (although not specifically supported, older versions of Windows will work with this cable modem)
Macintosh: Power PC or later; OS 9 or higher, Ethernet connection
UNIX: Ethernet connection
Home Networking: Ethernet router or wireless access point
General Attributes
Cable Connection 75 Ohms F-connector
Network Interface 10 / 100 / 1000 Base-T Ethernet (RJ-45)
Data Link Protocol TCP / IP
Power Supply 9W nominal
105 - 125VAC, 60 Hz
100 - 240VAC, 50 - 60 Hz
Compliance RoHS compliant, ENERGY STAR V2 , COC V3, Compliant per the "Code of Conduct on Energy Consumption of Broadband Equipment", CMM, MEPS
Environmental Requirements Operating Temperature: 32 to 104° F (0 to 40° C) Storage Temperature: -22 to 158° F (-30 to 70° C) Operating Humidity: 5 to 95% (non-condensing)
Dimensions (H x W x D) 5.2 x 5.2 x 1.7" (13.3 x 13.3 x 4.2 cm)
Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem
  • Ethernet Cable
  • Power Cable
  • 1-Year Limited Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    MotorolaSURFboard SB6121 DOCSIS 3.0 CPE Cable Modem
     
    4.7

    (based on 73 reviews)

    Ratings Distribution

    • 5 Stars

       

      (56)

    • 4 Stars

       

      (14)

    • 3 Stars

       

      (2)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (1)

    99%

    of respondents would recommend this to a friend.

    Pros

    • Easy to set up (65)
    • Fast (50)
    • Highly compatible (39)
    • Small (35)
    • Secure (24)

    Cons

      Best Uses

      • Home (52)
      • Small office (20)
      • Secure networks (12)
      • Heavy downloading (5)
      • Surfing the web (5)
        • Reviewer Profile:
        • High bandwidth user (41), Low bandwidth user (21), Quality oriented (7)
        • Primary use:
        • Personal (62), Business (8)
        • Computer Platform:
        • PC (35), Mac (29)

      Most Liked Positive Review

       

      Happy Surfing

      After being notified that Time Warner was raising their modem rental fee to $6/month I decided it was time to buy my own. After a lot of research I decided on the...Read complete review

      After being notified that Time Warner was raising their modem rental fee to $6/month I decided it was time to buy my own. After a lot of research I decided on the SB6141--but it was ninety bucks, and, if bought new, only came in white. So I bought the well-reviewed SB6121. I was slightly concerned about the talk about it being outdated and whatnot, but the date of manufacture on the modem TWC was renting me was 2009, so I'm pretty confident I'll get my money's worth out of my new modem. In a year's time I will have recouped the cost of this modem, and that's a year that I won't be paying to rent lame TWC equipment. If you're wondering about speeds, my connection is marginally faster, but I didn't buy the modem with the expectation of getting more than my plan offered. TWC is clearly the limiting agent. All in all, I'm very pleased with my decision.

      VS

      Most Liked Negative Review

       

      Firmware Version Outdated

      We have Rogers here in London,Ontario.Tek Savvy (ISP using Rogers infrastructure)supports this modem but will not update the firmware if the firmware version is outdated. I can't speak to it's performance or...Read complete review

      We have Rogers here in London,Ontario.Tek Savvy (ISP using Rogers infrastructure)supports this modem but will not update the firmware if the firmware version is outdated. I can't speak to it's performance or durability for obvious reasons.

      Reviewed by 73 customers

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      Displaying reviews 1-20

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      5.0

      Works great right out of the box

      By Xero Shoes

      from Boulder, CO

      About Me High bandwidth user

      Verified Buyer

      Pros

        Cons

          Best Uses

            Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

            I've used this modem before... in fact, I was leasing one from Comcast and, ultimately, paid about 3x more than if I had just bought the thing!So, when we moved, I bought this one. It was effortless to hook it up and get it running.

            • Primary use:
            • Personal
            • Computer Platform:
            • PC

            Share this review

             
            4.0

            Straightforward, works well

            By lehasb

            from Maine

            About Me Low bandwidth user

            Verified Buyer

            Pros

              Cons

                Best Uses

                  Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                  Right now, I have a low bandwidth connection, but I wanted a modem that was DOCSIS 3 capable in case I upgrade in the future. The SB6121 fits my needs of a DOCSIS 3 modem that isn't as expensive as the ones designed for really high bandwith users. I have had no issues with it so far.

                  • Primary use:
                  • Personal
                  • Computer Platform:
                  • PC

                  Share this review

                   
                  5.0

                  Simple but Effective

                  By JR

                  from Vancouver WA

                  About Me Low bandwidth user

                  Verified Buyer

                  Pros

                  • Easy To Set Up

                  Cons

                  • none

                  Best Uses

                  • Home

                  Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                  Installed easily by itself on Comcast. Seemed slow to authenticate by Comcast but after that everything was easy and simple. The modem does the job and saves me the overpriced cable modem rental cost.

                  • Primary use:
                  • Personal
                  • Computer Platform:
                  • PC

                  Share this review

                   
                  5.0

                  Works Great, Fast.

                  By Jesse

                  from Niceville, Florida

                  About Me Low bandwidth user

                  Verified Buyer

                  Pros

                  • Easy To Set Up
                  • Fast
                  • Small

                  Cons

                    Best Uses

                    • Home
                    • Small Office

                    Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                    I use this modem with Cox Internet. It was a breeze to hook up and activate. It has been powered up for a month with no problems. My download speed is much faster than with my old DOCSIS 2.2 modem.

                    • Primary use:
                    • Personal
                    • Computer Platform:
                    • PC

                    Share this review

                     
                    5.0

                    Rock Solid and Fast!

                    By Tom k.

                    from White Bear Lake, MN

                    About Me High bandwidth user

                    Verified Buyer

                    Pros

                    • Dependable
                    • Easy To Set Up
                    • Fast
                    • Secure
                    • Small

                    Cons

                    • none

                    Best Uses

                      Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                      Why rent when you can own? This is my second modem I have purchased in the last year. After the recent price increases in cable internet I replaced my mothers rented modem with this modem. It is faster then the forgotten outdated rented modem and has a payback in less then 8 months.

                      • Primary use:
                      • Personal
                      • Computer Platform:
                      • PC

                      Share this review

                       
                      4.0

                      Meets its specification

                      By Vern the voice

                      from Tampa Bay Area

                      About Me Low bandwidth user

                      Verified Buyer

                      Pros

                      • Easy To Set Up
                      • Fast
                      • Small

                      Cons

                        Best Uses

                        • Home
                        • Small Office

                        Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                        Worked out of the box, now we will see how reliable it is. Low enough power drain that it will be on 24/7. Needs a description of the router requirements that can be used with the modem....

                        • Primary use:
                        • Personal
                        • Computer Platform:
                        • PC

                        Share this review

                         
                        5.0

                        Great modem - fast

                        By Wayouthere

                        from San Francisco

                        Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                        More compact than I had imagined. Yet powerful I terms if signal strength and a better performer on wireless speed than I've had with previous modems.

                        Share this review

                         
                        5.0

                        Great item!

                        By Luisa

                        from Lakeside, CA

                        About Me Low bandwidth user

                        Verified Buyer

                        Pros

                        • Easy To Set Up
                        • Fast
                        • Highly Compatible
                        • Secure
                        • Small

                        Cons

                          Best Uses

                          • Home

                          Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                          Easy setup! Works with Mac. So far no problems.

                          • Primary use:
                          • Personal
                          • Computer Platform:
                          • Mac

                          Share this review

                          (1 of 1 customers found this review helpful)

                           
                          4.0

                          Good product for Comcast customer

                          By Francis

                          from Houston TX

                          Verified Buyer

                          Pros

                          • Easy To Set Up
                          • Highly Compatible
                          • Secure
                          • Small

                          Cons

                            Best Uses

                            • Home

                            Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                            Small, not as big as the Comcast provided; however, it doesn't come with built-in router.Anyway, I can save as high as $8/m as I have been paying to Comcast for the last several years in Houston. After less than 8 months, it makes even!

                            • Primary use:
                            • Personal
                            • Computer Platform:
                            • PC

                            Share this review

                             
                            5.0

                            Huge Internet Speedup

                            By Vidguy

                            from Langley,WA

                            About Me High bandwidth user

                            Verified Buyer

                            Pros

                            • Easy To Set Up
                            • Fast
                            • Highly Compatible
                            • Secure
                            • Small

                            Cons

                              Best Uses

                              • Small Office

                              Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                              Moving up to DOCSIS 3.0 has doubled my tested internet speeds (50mbs download and 15mbs upload)!
                              This modem installed easily and my internet provider had no problem addressing it. Nothing negative for me to say.

                              • Primary use:
                              • Business
                              • Computer Platform:
                              • Mac

                              Share this review

                               
                              5.0

                              Hands Down Best Modem

                              By Enzo's Mama-Maryann

                              from York, PA

                              About Me High bandwidth user

                              Verified Buyer

                              Pros

                              • Easy To Set Up
                              • Fast
                              • Highly Compatible
                              • Secure
                              • Small

                              Cons

                                Best Uses

                                • Home
                                • Secure Networks
                                • Small Office

                                Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                Best connection speeds I could ask for. Best part is that when the faster connection speeds are avaiilable in my area this modem will easily be able to accomodate.

                                • Primary use:
                                • Personal
                                • Computer Platform:
                                • Mac

                                Share this review

                                 
                                5.0

                                Fast and Easy To Set-Up

                                By Bodhi

                                from Kansas City

                                About Me High bandwidth user

                                Verified Buyer

                                Pros

                                • Easy To Set Up
                                • Fast
                                • Highly Compatible
                                • Small

                                Cons

                                • none

                                Best Uses

                                • Home Office

                                Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                My cable provider upgraded the speed they offer for my plan and after doing so my older DOCSIS2 modem kept dropping out. Replaced it with this and all is fine and my speed has increased considerably.
                                Price was right. Easy to set-up. Is smaller than my previous modem.
                                As always, B&H had best price and free shipping.
                                Win-Win.

                                • Primary use:
                                • Business
                                • Computer Platform:
                                • Mac

                                Share this review

                                 
                                5.0

                                Great Product

                                By Simon

                                from South Florida

                                About Me High bandwidth user

                                Verified Buyer

                                Pros

                                • Easy To Set Up
                                • Fast
                                • Highly Compatible
                                • Secure
                                • Small

                                Cons

                                  Best Uses

                                  • Home

                                  Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                  Great Product
                                  works fine with comcast

                                  Thank you

                                  • Primary use:
                                  • Personal
                                  • Computer Platform:
                                  • PC

                                  Share this review

                                  (1 of 1 customers found this review helpful)

                                   
                                  5.0

                                  Just cable, not for phone

                                  By Norm

                                  from Peachtree City, GA

                                  About Me High bandwidth user

                                  Verified Buyer

                                  Pros

                                  • Easy To Set Up
                                  • Fast
                                  • Small

                                  Cons

                                    Best Uses

                                    • Home
                                    • Small Office

                                    Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                    Fine just for cable

                                    • Primary use:
                                    • Personal
                                    • Computer Platform:
                                    • PC

                                    Share this review

                                     
                                    4.0

                                    Easy to setup

                                    By Randomrian

                                    from NYC

                                    About Me Low bandwidth user

                                    Verified Buyer

                                    Pros

                                    • Easy To Set Up
                                    • Highly Compatible

                                    Cons

                                      Best Uses

                                      • Home

                                      Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                      Reliable and fast setup

                                      • Primary use:
                                      • Personal
                                      • Computer Platform:
                                      • Mac

                                      Share this review

                                       
                                      5.0

                                      Avoids the Time Warner Modem Extortion

                                      By TWC Hater

                                      from Glendora, CA

                                      About Me Low bandwidth user

                                      Verified Buyer

                                      Pros

                                      • Easy To Set Up
                                      • Fast

                                      Cons

                                        Best Uses

                                        • Home
                                        • Small Office

                                        Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                        Bought the modem to avoid the Time Warner Cable extortion rental fee. It is faster than the TWC provided modem and will pay for itself within just months. Was easy to set up once I realized the upstream signal provided by TWC was marginal.Now that I don't rent my modem any longer I get a letter from TWC telling me they are raising my rate AGAIN! What a cowinkydink!!

                                        • Primary use:
                                        • Personal
                                        • Computer Platform:
                                        • Mac

                                        Share this review

                                         
                                        5.0

                                        Riding like a champ on my SURFboard \^^~

                                        By I like bhaudiovideo

                                        from San Antonio, TX

                                        About Me High bandwidth user

                                        Verified Buyer

                                        Pros

                                        • Easy To Set Up
                                        • Fast
                                        • Highly Compatible
                                        • Small

                                        Cons

                                          Best Uses

                                          • Home
                                          • Large Office
                                          • Secure Networks
                                          • Small Office

                                          Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                          I ordered this product, it took a little longer to receive than I would have liked, but arrived none the less. The price was as low as I could find it.The modem itself was new in a sealed box. I hooked it up, called tech support and gave them the MAC address. I was surfing the interwebs within 15 minutes.The modem has been working flawlessly for weeks now, and my cable company isn't extorting 6 dollars a month for my modem lease anymore. If you're a customer of any of the cable companies and don't like giving them money for something that should be free, this product is perfect!

                                          • Primary use:
                                          • Business
                                          • Computer Platform:
                                          • Mac

                                          Share this review

                                           
                                          5.0

                                          High Quality Modem

                                          By PhotoMike

                                          from Thousand Oaks, CA

                                          About Me Low bandwidth user

                                          Verified Buyer

                                          Pros

                                          • Easy To Set Up
                                          • Fast
                                          • Highly Compatible
                                          • Secure
                                          • Small

                                          Cons

                                            Best Uses

                                            • Home
                                            • Secure Networks
                                            • Small Office

                                            Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                            I purchased this modem after my cable provider, Time Warner, increased the monthly modem rental fee to $ The SB6121 modem is highly rated and was very easy to setup. It is a much better unit than the DOCSIS 2.0 rental modem it replaced. It's a good product.

                                            • Primary use:
                                            • Personal
                                            • Computer Platform:
                                            • Mac

                                            Share this review

                                             
                                            5.0

                                            New Cable Modem

                                            By John

                                            from Fenton MI

                                            About Me Low bandwidth user

                                            Verified Buyer

                                            Pros

                                            • Easy To Set Up
                                            • Fast
                                            • Highly Compatible

                                            Cons

                                              Best Uses

                                              • Home
                                              • Small Office

                                              Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                              I have been having cable internet troubles for quite a while. This solved that and even made my internet faster. I am very pleased with the venders good price, and quick service.

                                              • Primary use:
                                              • Personal
                                              • Computer Platform:
                                              • PC

                                              Share this review

                                               
                                              4.0

                                              Great Modem

                                              By Brigitte

                                              from Yardley, PA

                                              About Me High bandwidth user

                                              Verified Buyer

                                              Pros

                                              • Easy To Set Up
                                              • Fast
                                              • Highly Compatible

                                              Cons

                                                Best Uses

                                                • Home

                                                Comments about Motorola SURFboard SB6121 DOCSIS 3.0 CPE Cable Modem:

                                                i'm able to take advantage of my faster internet speeds using this modem

                                                • Primary use:
                                                • Personal
                                                • Computer Platform:
                                                • PC

                                                Share this review

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