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MOTOROLA SB6121 SURFboard Cable Modem RJ-45

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RJ-45
75ohm F-connector
Capable of downloading speeds up to 160 Mbps

Learn more about the Motorola SB6121

Model

Brand: MOTOROLA

Model: SB6121

Spec

Type: Cable Modem

Interface: RJ-45

Cable Interface: 75ohm F-connector

Features

Features: Data Protocol: TCP/IP

Power: 9W (nominal)

Input Power: 105 to 125 VAC, 60 Hz

Downstream:
-Modulation: 64 or 256 QAM

-Capture Bandwidth: 100 MHz (edge to edge)

-Maximum Theoretical Data Rate:
DOCSIS: 171.537 Mbps (4 channels) / 42.884 (single channel)@ 256 QAM at 5.36 Msym/s
EuroDOCSIS: 222.464 Mbps (4 channels) / 55.616 (single channel)@ 256 QAM at 6.952 Msym/s.

-Bandwidth:
DOCSIS: = 24 MHz
EuroDOCSIS: = 32 MHz.

-Symbol Rate:
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.

-Operating Level Range: –15 to 15 dBmV

-Security: DOCSIS 3.0 Security (BPI+, EAE, SSD)

-Network Management: SNMP v2 & v3

-Provisioning Supports: IP addressing using IPv4 and/or IPv6 (dual stack).

Upstream:
-Modulation: QPSK and 8, 16, 32, 64, 128 QAM

-Maximum Channel Rate
DOCSIS 131.072 Mbps (4 channels) / 32.768 Mbps (single channel): @ 128 QAM at 6.4 MHz
EuroDOCSIS 131.072 Mbps (4 channels) / 32.768 Mbps (single channel): @ 128 QAM at 6.4 MHz.

-Channel Width 200 kHz, 400 kHz, 800 kHz, 1.6 MHz, 3.2 MHz, 6.4 MHz

-Symbol Rates: 160, 320, 640, 1280, 2560, 5120 ksym/s

-Frequency Range: DOCSIS 5-42 MHz (edge to edge), EuroDOCSIS and optional DOCSIS 5 to 65 MHz (edge to edge)

-Compatibility:
Compatibility PC: 90496, Pentium, or later; Windows Vista, 2000, XP or 7 or Linux with Ethernet connection (older versions of Windows, although not specifically supported, 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.

Quick Info

Warranty

Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year

Manufacturer Contact Info

Customer Reviews of the Motorola SB6121

Do you own this product? Write a Review

Filter Results Last 2 Weeks (6) Last 6 Months (105) All Reviews (364) 73% (267) 11% (39) 4% (14) 2% (8) 10% (36) Verified Owners Video Reviews Mfr. Responses keyword Go page SubmitTopPaginationForm of 37 previousTopPaginationForm\| nextTopPaginationForm
Anthony 5/20/2013 4:15:20 PM Tech Level: 5/5 Ownership: 4/5 Verified Owner	Rating: 5/5Works Great Pros: Working great with time warner cable, no complaints at all. Cons: None 1 out of 1 people found this review helpful. Did you? Thanks for the valuable feedback you provided!
Shebagirl 5/18/2013 10:03:52 PM Tech Level: 3/5 Ownership: 5/5	Rating: 4/5Cheaper than renting Pros: It's faster than the SB5100 in which Comcast charges 8.00 a month to rent. Cons: It works great after you get it set up right by calling Comcast to give them the product serial number. Other Thoughts: What I did to eliminate the disconnects was was go into the Motorola web site and they can go into you Modem on line and bring it back to default what it's suppose to be. Since I did that I have no issues at all. The Blue lights are always on like they're suppose to be. Did you find this review helpful? Thanks for the valuable feedback you provided!
N/A 5/14/2013 12:03:41 PM Tech Level: 5/5 Ownership: 4/5 Verified Owner	Rating: 5/5 Pros: Purchased on 11/27/2012 and still running strong. Cons: Not really a con but the LEDs double as night lights on my living room. Other Thoughts: I was concerned after hearing plenty on negative reviews on this unit from other users however I've not had a problem with it yet. Running on TWC, connected to a Cisco EA4500. 1 out of 1 people found this review helpful. Did you? Thanks for the valuable feedback you provided!
N/A 5/14/2013 9:34:14 AM Tech Level: 4/5 Ownership: 4/5 Verified Owner	Rating: 5/5Works as intended Pros: Works as it should. Good bang for your buck. Not noise at all. Compatible with my ISP. Cons: Not the latest version. Lights on the front may be annoying if pointed at the user. Fairly bright LEDs. Other Thoughts: I got this to replace my rental I was paying monthly for from my ISP. It is an earlier version and works just a good. It will pay for itself in a few months. Works with my Dlink router. Did you find this review helpful? Thanks for the valuable feedback you provided!
Pocono Bob 5/9/2013 3:15:10 PM Tech Level: 5/5 Ownership: 4/5 Verified Owner	Rating: 3/5HOT Box Pros: Worked on it's own just fine, but conflicted w/ other components. Cons: VERY HOT box... It also conflicted w/ my ASUS router. It would reboot the router constantly. Returned for an ARRIS Other Thoughts: I've heard good things about this modem, but just wouldn't play nicely on my network. Did you find this review helpful? Thanks for the valuable feedback you provided!
mdavenport 5/9/2013 2:21:39 PM Tech Level: 4/5 Ownership: 4/5 Verified Owner	Rating: 5/5Excellent little modem! Pros: Seems to be reliable with good throughput. Haven't seen the connection ever drop or had any kind of latency. Cons: Bright blue tx/rx lights will light the whole room. Also the Link light's idle state is to flash orange (which means I'm on bonded channels). I know from the manual this means 'better connection', but it's really annoying constantly seeing a light flashing orange with no real reason. That seems poorly thought through. Other Thoughts: Superficial cons aside, this has been a great little modem so far. BUT (big but for you reading this), I'm only paying for the 3 mbps connection rate. This modem IS connected using DOCSIS 3.0, but I have no idea how it performs at 50 mbps or higher, nor will I ever find out. Did you find this review helpful? Thanks for the valuable feedback you provided!
N/A 5/6/2013 7:29:36 AM Tech Level: 3/5 Ownership: 4/5 Verified Owner	Rating: 5/5Motorola knows their cable modems Pros: Rock solid, as was the SB5121 it replaced. Cons: No problems at all. Did you find this review helpful? Thanks for the valuable feedback you provided!
pmbrenner91 5/3/2013 7:17:44 AM Tech Level: 4/5 Ownership: 3/5 Verified Owner	Rating: 5/5Excellent - No Issues Pros: Easy install. Easy activation. Super fast. No complaints. Smaller than I was expecting. Cons: No coaxial cable provided with install kit. Did you find this review helpful? Thanks for the valuable feedback you provided!
N/A 5/2/2013 11:46:31 AM Tech Level: 5/5 Ownership: 4/5 Verified Owner	Rating: 4/5Well worth the money! Pros: Ease of setup Speed increase to my Internet Cons: The LEDs are really bright in the dark! Little higher price than I wanted to pay but still worth it. Other Thoughts: I do not have the fastest Internet package that my ISP has but even with my lower level this modem added to my download speed and tripled my upload speed. I am "technically" getting better speeds than what I pay for :) Did you find this review helpful? Thanks for the valuable feedback you provided!
Murano 4/27/2013 1:59:22 PM Tech Level: 4/5 Ownership: 3/5 Verified Owner	Rating: 1/5Survived for 4 weeks Pros: Compact and easy installation Cons: Ordered this unit 4 weeks ago and now it's dead. Newegg provided a rebate so I cut UPC and claimed it. Now I can't even return it or get it replaced. Thanks, Newegg! 0 out of 1 people found this review helpful. Did you? Thanks for the valuable feedback you provided!
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