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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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  • Jaichandran M.
  • 8/28/2014 11:49:33 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWork really well and super fast.

Pros: Before purchasing this one, I was using a first generation Motorola modem with for an internet speed of 50 mbps. When I did the speed test it was giving just half of the speed for a wired connection and 1/4th for wireless. I researched and found that would have to change modem in order to get full speed that was delivered by ISP. I purchased this one and as expected , it delivered full speed of 50 mbps and sometimes more than that. Works well, still in use. No issue observed. Very easy to install and cool looking lights.

Cons: None

Other Thoughts: I am getting throughput > 50 Mbps as it is a high throughput modem.

Did you find this review helpful? Yes No

  • Robert A.
  • 8/27/2014 7:42:36 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsWorks Well

Pros: It is a high throughput modem. It pays for itself instead of going through Comcast rental fees. The cable tech was able to get it setup right away right out of the box.

Cons: I do have to reboot it about once a month, since I loose connection to the internet sometimes.

Other Thoughts: I am getting throughput > 50 Mbps. And If I want to upgrade my internet speed I can go up one more plan without upgrading my modem, but needs more than 50Mbps?

Did you find this review helpful? Yes No

  • matthew s.
  • 8/26/2014 8:00:38 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsMOTOROLA SB6121 SURFboard Cabel Modem

Pros: Small and simple to use.

Cons: The power adapter that came with it did not work. I had to use another power adapter I had to get it to work

Did you find this review helpful? Yes No

  • Mark J.
  • 8/24/2014 7:19:00 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsreliable, works with comcast

Pros: logging utility helped debug bad cable connection.

Cons: none.

Did you find this review helpful? Yes No

  • 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.

1 out of 1 people found this review helpful. Did you? 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!

1 out of 2 people found this review helpful. Did you? 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.

1 out of 1 people found this review helpful. Did you? 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.

1 out of 1 people found this review helpful. Did you? 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.

0 out of 1 people found this review helpful. Did you? 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.

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

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Item#: N82E16825122015
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