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ARRIS Group, Inc > 
Item#: N82E16825122015

ARRIS SurfBoard SB6121 DOCSIS 3.0 Cable Modem

  • Compatible with Time Warner, Comcast, Charter, Cablevision, and others
  • Gigabit Ethernet connectivity
  • DOCSIS 3.0-certified (EuroDOCSIS 3.0-based)
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SB6121

SB6121 SURFboard Cable Modem RJ-45

Building upon the success of the SB6120, The ARRIS SURFboard SB6121 delivers your complete personal media experience, at lightning-fast broadband speed. It harnesses the power of DOCSIS 3.0 technology to bond up to four downstream channels and four upstream channels - providing you advanced multimedia services with data rates of more than 100Mbps in each direction. That makes gaming, shopping, downloading, working, high-quality voice and video conferencing, and peer-to-peer networking applications far more efficient than ever before.

 

Features

SB6121 Easy to Set Up and Use
  • Plug-and-play installation
  • Front panel LEDs indicate status and simplify troubleshooting
  • Multi-language user guides
  • Supports standard internet software
  • User-friendly online diagnostics

Efficient
  • Stylish and space-saving enclosure
  • Offers innovative, high-bandwidth data and multimedia services to customers
  • Backward-compatible to DOCSIS / EuroDOCSIS 1.x and 2.0

Advanced Services Ready
  • DOCSIS 3.0-certified (EuroDOCSIS 3.0-based)
  • Channel bonding of up to four downstream and four upstream channels
  • 1GHz capable tuners
  • Supports IPv4 and IPv6 to expand network addressing capabilities
     
Versatile and Convenient
  • Compatible with Windows, Macintosh, and UNIX computers.
  • Gigabit Ethernet (RJ-45) data port enable flexible, high-speed connectivity with Auto Negotiate and Auto MDIX

Reliable and Secure
  • Enhanced security: supports Advanced Encryption Services (AES) traffic encryption
  • Remotely configurable and monitorable using SNMP and TFTP
 
SB6121

As part of the ARRIS DOCSIS 3.0 Ultra-Broadband family of products, the SB6121 includes an enhanced tuner that supports up to a 1GHz downstream input, which allows operators to increase the frequency spectrum for deployment of new high-value service - such as bandwidth on-demand, commercial services, interactive gaming, and IPTV. The SB6121 features a 10/100/1000 Base-T Ethernet (RJ-45) port, as well as intuitive, easy-to-read front-panel operational status LEDs.

What Is DOCSIS 3.0?

With the DOCSIS 3.0 specification, cable Internet providers can take advantage of the extra capacity provided by channel-bonding technology in order to offer ultra-fast broadband services. Channel bonding allows parallel data pipes to act as a single broadband conduit. With each channel capable of providing around 40Mbps of data, the ARRIS SURFboard SB6121's four downstream channels can provide a theoretical maximum of 160Mbps of throughput.

Currently, cable providers max out at around 50Mbps of downstream data throughput, but DOCSIS 3.0 will enable cable Internet providers to continue to improve the speed of their networks.

System Requirements
The SB6121 is compatible with the following operating systems:
  • Windows 7
  • Windows Vista, Service Pack 1 or later
  • Windows XP, Service Pack 2 or later
  • Mac 10.4 or later (Ethernet connection only)
  • UNIX (Ethernet connection only)
  • Linux (Ethernet connection only)

What's in the Box

ARRIS SURFboard SB6121, Ethernet cable, Installation sheet
 
 

 


Learn more about the ARRIS Group, Inc SB6121

Model

Brand
ARRIS
Model
SB6121

Details

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)

Quick Info

Warranty

  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years


Customer Reviews of the ARRIS Group, Inc SB6121

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  • Stephen O.
  • 7/19/2015 6:58:01 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsInvest in Paying your ISP Less

Pros: -Works exactly as advertised
-Didn't have to rent one from the ISP so saved 10$ a month. Basically paid this thing off in less than a year
-Over a year running and has need exactly 0 attention except the time my roommate accidentally unplugged it

Cons: -none

Did you find this review helpful? Yes No

  • p.lloyd l.
  • 7/16/2015 1:29:40 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggssweet........

Pros: man all i can tell you is that its sweet/nice ,it works greet ,cant complain hear,great buy , but best when on sale ,i got 2 things for on greet price at the time in may 2015 [router]

Cons: none i`m happy

Did you find this review helpful? Yes No

  • William G.
  • 7/9/2015 7:37:32 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs

Pros: Decent price, got my money back from renting from cable provider pretty quickly. Worth the price and works as well or better than TWC rental.

Cons: None

Did you find this review helpful? Yes No

  • Anonymous
  • 7/4/2015 11:32:44 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsThe Standard Cable Modem

Pros: Almost plug-n-play. Easy web setup through Comcast/Xfinity. Didn't have to call anyone.

Cons: Wish it were capable of high speeds.

Did you find this review helpful? Yes No

  • Plamen K.
  • 7/3/2015 7:14:22 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsdead after only 10 months

Pros: Cheapest modem approved by Comcast that has three stars certification.

Cons: Modem had problems about 6 months after purchase. Comcast had to send a "refresh" signal, which took about 2 hours on the phone with customer service. A month ago the signal started deteriorating with frequent drops of connection. Upload speeds were below 1 Mb/s. Two weeks ago we practically lost connection. It would work for about 30 sec after renewing the lease and then it would stop working. Lights on the front panel were fine and readings on the diagnostic page didn't show anything wrong. However Comcast provided another modem that works perfectly well, so there is not much to argue about.

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

  • Jacob B.
  • 6/11/2015 1:51:56 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsIf you're experiencing slower speeds and you have COX ISP

Pros: Can support up to 32 LAN connections (if you plan to use an ethernet switch). Rock solid connection at any time of day, can handle high-speed internet. Highest quality modem at this price range, you'll be hard pressed to find anything better than this sub $100.

Cons: IF THE 2ND AND 3RD LIGHTS ARE BLUE FOR YOU IGNORE THIS:

Speed test results showed 30/10 speeds when the internet plan is 50/10.
Checked the modem settings by going to 192.168.100.1
In the "signal" tab noticed that there was only 1 upstream & downstream, there should be 4 when using DOCSIS 3.0.
Checked the "help" tab, firmware version was 1.0.5.1. On COX's end my modem showed up as a DOCSIS 2.0, so they were sending me a crippled connection.

Called tech support, knowing exactly what the problem was. Get hassled for 4 hours. Finally get sent to a "level 2" tech and he gives me a hard time about not knowing what I'm talking about, he'll send out a technician the next day. Even though I know the problem is an outdated Firmware.. fine whatever.

Later that night (at 1am) modem resets. Check modem settings shortly after, firmware now updated. And what do you know, getting correct speeds and 4 upstream and downstream channels.

Firmware version that works:
"SB_KOMODO-1.0.6.14-SCM01-NOSH"

This may have been COX's fault, and I know the people who activate (provision) the router simply typing in the MAC address and it's suppose to work, but it didn't.

Other Thoughts: If 2nd and 3rd lights on modem are
green = bad, using DOCSIS 2.0
blue = good, using DOCSIS 3.0
red = you need to talk to your isp to provision/register your new modem

9 out of 9 people found this review helpful. Did you? Yes No

  • Bikash J.
  • 6/7/2015 5:53:10 AM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsExcellent Product - No issues after 18 months

Pros: Sturdy built
Connects quickly
No issues encountered while changing routers or moving to another apartment.

Cons: None encountered

Other Thoughts: Saves money on Comcast Modem Lease providing a good Return on Investment.

Did you find this review helpful? Yes No

  • Joseph G.
  • 5/21/2015 2:43:47 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsGood, with a possible caveat

Pros: Easy to install, fast and knowledgeable customer service.

Cons: Possible bad firmware, leading to problems with connection speeds.

I activated the modem with my service provider (Cox), but was only seeing ~30Mbps down with a 50/5 connection service. After several service calls and a tech visit, my provider determined the gateway was the problem. I contacted ARRIS support and we found that I was only getting a single channel connection, where I should have been getting four.

I then had to re-contact my service provider to have them re-provision the modem. The level two tech that assisted me said that this was actually an issue with the ARRIS firmware, and it was only allowing them to lock a single channel. She updated the modem using their Cox firmware and was able to resolve the issue.

TL;DR: Getting the connection at the right speed may take additional time and effort.

Other Thoughts: Regardless of whether this was a Cox issue or a gateway issue, I'm giving this three eggs. It's a good product, but getting it working correctly may not be as easy as advertised.

5 out of 5 people found this review helpful. Did you? Yes No

  • Scott J.
  • 5/15/2015 7:56:15 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsMotorola SB6121 Cable Modem

Pros: It totally works, Dude! A quick call to my service provider and they set up the service and I returned their stupid $6.00 a month modem to them.

Cons: None so far.

Other Thoughts: I thought about the newer model but as part of a package with the router too, wow, what a good deal. Newegg you rock.

Did you find this review helpful? Yes No

  • Joshua W.
  • 5/15/2015 7:52:39 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSaves money, works great

Pros: -No issues at all
-Saves me money on my internet bill
This product is simple to set up. Just hook it up, call the ISP (Time Warner in my case) and it is done. Not having to pay the equipment fee every month is nice, and this is more than fast enough for any plan available in my area.

Cons: None come to mind. It works great and saves me money. What else could I ask for?

Other Thoughts: After getting this on sale (with a free item included as well) and it saving me $9 a month, it should pay for itself within 8 months.

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

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Networking > 
Modems / Gateways > 
ARRIS Group, Inc > 
Item#: N82E16825122015
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