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Motorola > 
Item#: N82E16825122015

MOTOROLA SB6121 SURFboard Cable Modem Up To 172 Mbps Down and 131 Mbps Up RJ-45, Gigabit Ethernet DOCSIS 3.0, 2.0 and 1.1, Euro-DOCSIS 3.0

  • Gigabit Ethernet connectivity
  • DOCSIS 3.0-certified (EuroDOCSIS 3.0-based)
  • Channel bonding of up to 4 downstream and 4 upstream channels
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Learn more about the Motorola SB6121

Model

Brand
MOTOROLA
Model
SB6121

Spec

Type
Cable Modem
Interface
1 x RJ-45, Gigabit Ethernet
Cable Interface
75ohm F-connector
Standards
DOCSIS 3.0, 2.0 and 1.1, Euro-DOCSIS 3.0
Max Transmission Rate
Up To 172 Mbps Down and 131 Mbps Up

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.

Packaging

Package Contents
Ethernet Cable
Power Supply
Software License & Regulatory Card
Product Guide (Install Sheet)

Manufacturer Warranty

Parts
2 Year Limited Warranty
Labor
2 Year Limited Warranty

Quick Info

Warranty

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


Customer Reviews of the Motorola SB6121

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  • LuoYan Y.
  • 8/18/2014 11:33:09 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggs

Pros: OK price. decent speed.

Cons: lost or drop of connect occurs very often, all most every other day. It will reconnect in just minutes.

Did you find this review helpful? Yes No

  • Brent W.
  • 8/16/2014 11:12:30 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggs

Pros: 2.5 years and still going strong, maybe reset 1-2 times. So rare hard to remember, fast speed as stated.

Cons: cooling fan, I wish modems and routers had a small cooling fan. Not that this modem get to hot or anything I just think the electronics would benefit!

Did you find this review helpful? Yes No

  • Anonymous
  • 8/15/2014 1:49:53 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat Modem

Pros: This is a good modem. I hardly have to reset it. I have owned this modem for about eight months and I have only had to reset it about a handful of times. It is fast. It has already paid for itself considering the cable company wanted $7 dollars a month to rent a considerably slower modem. Do not regret buying it. Best decision ever.

Cons: There are no cons really.
I only wish my cable provider offered internet fast enough to take advantage of the modem's speed.

Other Thoughts: If you want a modem buy any of the Motorola Surfboards. It is way better than renting. I think they are all pretty good.

Did you find this review helpful? Yes No

  • Kirk M.
  • 8/13/2014 9:46:39 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorks

Pros: Works, stable, Comcast supported

Cons: none

Other Thoughts: It is a quality cable modem, you turn it on and it just works.

Did you find this review helpful? Yes No

  • Yunier H.
  • 8/13/2014 5:28:21 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsGood till it lasted

Pros: Good, fast

Cons: It stopped working one day, as per my Internet provider it died because of being on all the time, go figure.

Did you find this review helpful? Yes No

  • David K.
  • 8/8/2014 1:08:43 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsLast one just shot craps

Pros: Eh...easy to hook up but most cable modems are. They will activate with COX pretty easy on-line without even talking to support.

Cons: Trust me 2 years is about the Max you'll get out of these,at least that's my experience. I wrote the date on my last one--8/12/12 and I just replaced it. Had a ton of online stuff to do so I had to buy local and get back on-line. Like all this China stuff it's trash--with Motorola's name on it. That would be number 3 modem in 6-7 years. My first cable modem was a Toshiba that lasted over 10 years.

Other Thoughts: See how this one goes before starting to drop the connection.

Did you find this review helpful? Yes No

  • Jeff L.
  • 8/7/2014 2:24:04 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsDead after 6 months

Pros: Avoids TWC's rental fee. Low cost, easy to setup.

Cons: Immediately after switching out the old rental modem, I noticed that an auto-refreshing page I leave open (Slashdot) would have a connection error page in the morning. I never experienced this on the previous modem, but it happened daily on this one.

About a month ago, I noticed my speed was very sporadic. Mostly an issue on Youtube, I assumed it was TWC's network management. Now I'm not so sure.

Today I wake up to no internet. I can connect to the modem's page (192.168.100.1) and everything looks fine, but the upstream and downstream channel lights are blinking. Time Warner tries a variety of things to fix it, but cannot. They say the modem is stuck in a very low-speed mode.

Even with Cross-shipping (AKA Advance Replacement), they still do not pay for shipping the dead unit back to them. They also said that it will take 3-5 days for them to SHIP the replacement, and this is on the "Rush" option, with a fee of $12.

Other Thoughts: Last month I advised a friend to get the SB6141 to use with WideOpenWest. I hope that one fairs better than this.

1 out of 1 people found this review helpful. Did you? Yes No

  • Brandon O.
  • 8/5/2014 1:01:04 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsDon't waste your time, seriously

Pros: Small
Wall Mountable
An alternative to paying monthly for a garbage modem/router combo from your ISP.

Cons: Purchased on 1/6/13 after I got tired of paying monthly for a garbage modem router/combo from Comcast.
After a couple of months, I started having to manually reset to the modem, (all lights were on, noboby home)
Started rebooting itself by september that same year. yeah, 8 months people.
After hours of research and self testing, and not finding anything out, I questioned the ISP.
After multiple frustrating calls with Comcast, they refused to take any responsibility for this issue, and shifted 100% of the blame to the surfboard.
For a couple months after that, the rebooting was once a week, but before I knew it, it was once a day.
Today, it rebooted 4 times in an hour and 20 minutes.

other con: the LED's are that certain BLUE that is blinding even when not looking at it directly, not a huge deal (can set up the modem out of sight, or electrical tape works great) but im just including the fact, because the word "hate" is not harsh enough to describe my feelings towards this thing.

Other Thoughts: I don't know what to believe anymore, as the same kind of thing was happening when I was renting Comcast's garbage modem/router combo. Starting to think that all modems last 9 months. For once I'd like to have something last.

This just in, the modem rebooted for a 5th time as I was finishing up the "other thoughts" section of a negative review about that very modem... Sweet, sweet irony, I wish I was kidding. I will go office space on this modem when my new one shows up in the mail.

I don't know what one to buy though, as I have been dissapointed so many times.

I just did a search on newegg for the highest rated modem. Results: Motorola SB6141 Surfboard. Looks like the exact same product, only in WHITE. *sigh*

1 out of 1 people found this review helpful. Did you? Yes No

  • Miteshkumar P.
  • 7/31/2014 8:49:44 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsDo not recommend for extreme speed

Pros: Working well with up to 20 MB Speed of Time Warner Cable.

Cons: But when I requested for Extreme Speed i.e. 30 MBs, Modem wasn't supporting that high speed. I spoke to Technical support team from Time Warner Internet and they requested me to change my modem. Unfortunately, I started using this modem after more than 60, I don't have option to replace it.

0 out of 2 people found this review helpful. Did you? Yes No

  • Stanley D.
  • 7/25/2014 12:13:26 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsRunning Strong on Comcast

Pros: Running strong on Comcast, no issues.
Is highly recommended from Comcast list of approved modems.

Cons: Generates a little more heat then I would've expected.

Did you find this review helpful? Yes No

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Item#: N82E16825122015
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