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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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  • Maurice H.
  • 7/21/2014 9:47:03 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsWas good while it lasted...

Pros: Bright LED lights. simple setup. lasted almost 2yrs. Small form factor. Trouble free until the END came.

Cons: Did not even last 2yrs. out of the blue started dropping connections. It got progressively worse from once a week to every day. From a 5-10min drop to over 2hrs to reconnect.

Other Thoughts: I know better than buying anything with a Motorola name on it! I've owned two Motorola cell phones (can you say Motorola Triumph) so I know about Motorola's so called quality. It's a good thing I used a credit card with and extended warranty protection. My credit card company will foot the bill for a new one....definitely not going to be MOTOROLA/ARRIS or whatever their new name is!

Did you find this review helpful? Yes No

  • James R.
  • 7/18/2014 12:21:17 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGood modem

Pros: Small, can attach to wall. Been running nonstop for months now no issues. Was easy to get to hook up to my ISP and running.

Cons: None

Did you find this review helpful? Yes No

  • Gan S.
  • 7/17/2014 7:04:43 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsmodem DOA

Pros: cheap modem, supposedly speed is great

Cons: modem DOA. non-existent support. have to RMA @ my own cost

Did you find this review helpful? Yes No

  • Scott D.
  • 7/14/2014 12:03:06 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWorks Great!

Pros: Works Great!

Cons: This unit is not designed for very high internet speeds @ 100Mbps+

This is not a problem with the device, just not what it was designed to do.

Did you find this review helpful? Yes No

  • Joseph S.
  • 7/11/2014 9:49:10 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsWorks Great

Pros: Have been using the same SB6121 since 2011.
Provisioned with Comcast in a day and haven't needed to do anything further.

Bought to run at 20Mbs, upgraded to 50Mbs and ISP has increased speed to 75Mbs , which is way more than I need.

Cons: LEDs rather bright.

Other Thoughts: Speedtest rates the modem at over 100/11Mbs which is incorrect.
TestMy rates at 75/11 Mbs which is more realistic.

With 172/131 rated speeds no need to buy newer 8-channel SURFboard.

Did you find this review helpful? Yes No

  • Vladislav Y.
  • 6/30/2014 4:08:50 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsjunk

Pros: It worked

Cons: After 1 year and 3 month it doesn't.
And I guess what? Warranty is 1 year.

Other Thoughts: Avoid, period.

0 out of 4 people found this review helpful. Did you? Yes No

  • Edwin F.
  • 6/26/2014 11:57:30 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsNot top-of-the-line but close

Pros: DOCSIS 3.0 (simultaneous TX and RX).
Same upload-speed potential of SB6141 (4-channels).
Firmware auto-updated once activated (Comcast, H/W v5.0).

Cons: Only half the download-speed potential of the SB6141 (4-channel vs. 8-channel).

Other Thoughts: Contrary to other reviews, it DOES work with the WRT54GL (modem's 1Gb Ethernet works with router's 100Mb).
Runs fairly cool (4~8dBmV down, 38~40dBmV up)
LED brightness perfect (not too dim, not too bright).
Newegg rocks!

Did you find this review helpful? Yes No

  • eric k.
  • 6/21/2014 9:01:03 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

1 out of 5 eggsif you are a Time Warner customer - DO NOT BUY THIS MODEM

Pros: works great with another internet provider.

Cons: if you are a time warner customer, this modem will reboot several times a day. the firmware time warner is using does not function properly with this modem. you will have upstream response issues nonstop. want to download a file or watch a video on the net? good luck. want to use voip? good luck..

2 out of 6 people found this review helpful. Did you? Yes No

  • Jon Z.
  • 6/13/2014 11:55:27 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat cable modem

Pros: Finally got rid of my cable provider's modem. Not only does this one look waaaaay better but it's already paid itself back after 6 months. I also haven't had any service drops. Haven't noticed really any change in speed, etc. but I didn't really expect to.

Cons: None

Other Thoughts: Good looking, inexpensive, fully functional cable modem.

Did you find this review helpful? Yes No

  • Ross H.
  • 6/13/2014 11:39:09 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAwesome

Pros: works as describe works great have had no issue with it

Cons: None as of yet

Did you find this review helpful? Yes No

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Motorola > 
Item#: N82E16825122015
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