Motorola Arris SURFboard 200 Series Cable Modem SB6121 DOCSIS 3.0. BRAND NEW

Name: Motorola Arris SURFboard 200 Series Cable Modem SB6121 DOCSIS 3.0. BRAND NEW
Brand: Motorola
Price: 15.0 USD
Availability: InStock
Rating: 4.57 (319 reviews)

RcSellcells

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US $15.00

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Condition:

New

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US $4.99 USPS Priority Mail®.

Located in: Barling, Arkansas, United States

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Estimated between Fri, Nov 7 and Fri, Nov 14 to 94104

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eBay item number:146071595281

Last updated on Nov 01, 2025 18:11:02 PDTView all revisionsView all revisions

Item specifics

Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitionsopens in a new window or tab

Country of Origin: China

Maximum Downstream Data Rate: 172 Mbps

Maximum LAN Data Rate: Unknown

Custom Bundle: No

Color: Black

Ports: Ethernet (RJ-45), Modem Cable Jack

Item Length: 5.24"

To Fit: PC

Serial Number: 3980 7951 3551 1023 0101 2019

DOCSIS Standard: DOCSIS 3.0

Modem Device Type: Cable Modems & Routers

Manufacturer Warranty: None

Item Height: 5.24"

Model: SB6121

Connectivity: Single Ethernet (RJ-45) Port

Features: Dual-Band

Carrier: Unlocked

Number of LAN Ports: 1

Item Width: 1.65"

UPC: 0606440046624

Brand: Motorola

Type: Cable

MPN: 575319-019-00

About this product

Product Information

Those looking for a fast and reliable modem that is compatible with both Mac and Windows operating systems can look at the Motorola SURFboard SB6121 (575319-019-00) 199.68 Mbps cable modem. This model uses the SNMP and HTTP remove management protocol along with the TCP/IP network transport protocol. This unit features a 195 Mbps transfer rate and it contains four different multiplexed channels. It features a variety of line coding formats and it is compatible with 32 QAM, 16 QAM, and QPSK line coding. Other features of the modem include IPv6 support, auto-negotiation, IPv4 support, and auto-uplink for users to take advantage of.

Product Identifiers

Brand

Motorola

MPN

575319-019-00

UPC

0612572186237, 0606440046624

Model

SURFboard SB6121

eBay Product ID (ePID)

114301358

Product Key Features

Type

Cable

Additional Product Features

Data Transfer Rate

199.68Mbps

Enclosure

External

Hardware Interface

Ethernet

Transmission Line

Cable

Network Ports

F-Connector

Item description from the seller

About this seller

Joined Nov 2017

Visit store Contact

Detailed seller ratings

Average for the last 12 months

Accurate description

4.7

Reasonable shipping cost

4.7

Shipping speed

5.0

Communication

5.0

BabyMusic

Seller feedback (832)

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Verified purchase
GREAT VALUE-GREAT QUALITY-GREAT CONDITION-GREAT APPEARANCE 🏆 SUPER STAR🤩 AMAZING PHOTOS 🎯 ACCURATE DESCRIPTION ✏️ GENUINE PRODUCTS 💎 HIGH QUALITY 🍯 SUPER PRICES 💰 EASY TO WORK WITH 🍰 ECONOMY HANDLING ⏱️ FAST SHIPPING 🚀 BUBBLE PACKAGE 📦 ARRIVED WITHIN DAYS 🌎 EXCEPTIONAL COMMUNICATION 🎙️ OUTSTANDING CUSTOMER SERVICE 🛎️ GREAT SENSE OF HUMOR 🍿 TOTAL ASSET TO THE EBAY-ECO SYSTEM 🥇 SAVED SELLER 🎱 PROMT REPLY FOR RETURNS 🎯 WOULD BUY FROM AGAIN 🧲 UNDER PROMISES OVER DELIVERS ⛳️
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Playstation PS3 PS4 PS5 Rockband Harmonix Fender Stratocaster / No Dongle! (#146457881441)

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Product ratings and reviews

Learn more

4.6

319 product ratings

251 users rated this 5 out of 5 stars
39 users rated this 4 out of 5 stars
5 users rated this 3 out of 5 stars
9 users rated this 2 out of 5 stars
15 users rated this 1 out of 5 stars

Easy to set up

Good value

Performs well

Most relevant reviews

See all 195 reviews

by wcshamilton
Jul 14, 2017Top favorable review
SB6121 PREMOD Forceware v1.4b-mod2
This is a review of the Motorola SB6121 PREMOD w/Forceware cable modem. If you are looking for one on a stock SB6121, look elsewhere. This is a totally different beast, and NOTHING will work for you. With that out of the way: It works great for what I wanted. After reading and reading, and reading some ore, I hooked it up, changed a few parameters to let it connect, and success! Nice and fast, most options are fairly easy to understand, and it works. Make sure the "Start Mode" is set to "Online", "Tuner CFG" to MT2170, and the "PGA Type" to MT1570. If your system uses certs, READ ALOT. There are quite a few How-To's out on the Web. A negative point: It can take awhile for the modem to reboot, and then foe your router to actually get it's DHCP address/etc from the modem, and actually ... This is a review of the Motorola SB6121 PREMOD w/Forceware cable modem. If you are looking for one on a stock SB6121, look elsewhere. This is a totally different beast, and NOTHING will work for you. With that out of the way: It works great for what I wanted. After reading and reading, and reading some ore, I hooked it up, changed a few parameters to let it connect, and success! Nice and fast, most options are fairly easy to understand, and it works. Make sure the "Start Mode" is set to "Online", "Tuner CFG" to MT2170, and the "PGA Type" to MT1570. If your system uses certs, READ ALOT. There are quite a few How-To's out on the Web. A negative point: It can take awhile for the modem to reboot, and then foe your router to actually get it's DHCP address/etc from the modem, and actually connect to the internet. Just be patient. NO, I'M NOT AN EXPERT ON THIS FIRMWARE. Don't ask me "How do I...". I'll ignore them. You have to determine if this modem is for you, and how to get it to work. In my case, I've used alot of SB51XX Premod modems before, so I knew what will work, and what won't for my cable system. READ AND LEARN. In my case, I could use this one to substitute for my subbed modem, and, using the stock configuration file, have everything humming along nicely. As far as a DOCSIS 3.0 Modem goes, it works. There are faster and more feature rich models out there (some premodded, some not), but for me and my situation, this one works wonderful.
Verified purchase: YesCondition: Pre-OwnedSold by: orangecountydeals
by josephfernadez1122
Dec 08, 2015
You get what you pay for
I decided to choose this product rather than the faster modem, the SB6121 due to wanting to save a buck or two and because I live in a 1 bedroom apartment. The internet I receive is fast, adequate when running through the cables, obviously less so through wifi. All in all I appreciate the modem and it's usefulness. It was easy to set up and has been great thus far.
Verified purchase: YesCondition: Pre-OwnedSold by: p70yuOqQTn2@Deleted
by ksvitale
Apr 06, 2016
Older model but still supported
I purchased this product to be used on COMCAST. The first thing the installation tech said was that it was marked as "end of life", which meant that COMCAST would stop supporting it shortly and I would have to purchase another soon. This concerned me but upon a further conversation with a COMCAST telephone-support tech, I was told that it just meant that COMCAST was no longer selling this model and would not offer tech support for it. Having said all that, the unit is DOCSIS 3.0 compatible and should work up to 170 mbps. I am only using this modem with 10 mbps service whereas COMCAST is offering up to 2 gbps. If you are only planning to use this unit up to 170 mbps service then this unit is fine. Peace and blessings.I purchased this product to be used on COMCAST. The first thing the installation tech said was that it was marked as "end of life", which meant that COMCAST would stop supporting it shortly and I would have to purchase another soon. This concerned me but upon a further conversation with a COMCAST telephone-support tech, I was told that it just meant that COMCAST was no longer selling this model and would not offer tech support for it. Having said all that, the unit is DOCSIS 3.0 compatible and should work up to 170 mbps. I am only using this modem with 10 mbps service whereas COMCAST is offering up to 2 gbps. If you are only planning to use this unit up to 170 mbps service then this unit is fine. Peace and blessings.
Verified purchase: YesCondition: Pre-OwnedSold by: us_auctions4u
by charl.owens
Oct 29, 2015
Cable Modem SB6121
Needed faster internet and cable was the only option. Cable company was charging a rental fee but gave options for me to purchase my own cable modem. Bought this used on Ebay and works great. Very happy with the purchase.
Verified purchase: YesCondition: Pre-OwnedSold by: jeremy289er
by bigbubba2002
Nov 08, 2015
Streaming demon
Set up with Comcast was a breeze, at least as far as over the phone anyway. Works well with thru my cisco router as all 4 of my puters wired and two laptops wireless all streaming YouTube or an anime channels at same time. No choking with this bad boy. Great and I mean great buy with screaming delivery time too of only two days from purchase. Impressed I am. Easy set up, easy activation, easy money as I saves my over a "hundred dollars a year" in rental fees to Comcast.Set up with Comcast was a breeze, at least as far as over the phone anyway. Works well with thru my cisco router as all 4 of my puters wired and two laptops wireless all streaming YouTube or an anime channels at same time. No choking with this bad boy. Great and I mean great buy with screaming delivery time too of only two days from purchase. Impressed I am. Easy set up, easy activation, easy money as I saves my over a "hundred dollars a year" in rental fees to Comcast.
Verified purchase: YesCondition: Pre-OwnedSold by: ssdealsprime

Motorola Arris SURFboard 200 Series Cable Modem SB6121 DOCSIS 3.0. BRAND NEW

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Item specifics

About this product

Product Information

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Product Key Features

Additional Product Features

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About this seller

RcSellcells

96% positive feedback•2.0K items sold

Detailed seller ratings

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Seller feedback (832)

Product ratings and reviews

Most relevant reviews

SB6121 PREMOD Forceware v1.4b-mod2

You get what you pay for

Older model but still supported

Cable Modem SB6121

Streaming demon

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RcSellcells

96% positive feedback•2.0K items sold

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Motorola Arris SURFboard 200 Series Cable Modem SB6121 DOCSIS 3.0. BRAND NEW

Shop with confidence

Item specifics

About this product

Product Information

Product Identifiers

Product Key Features

Additional Product Features

Item description from the seller

About this seller

RcSellcells

96% positive feedback•2.0K items sold

Detailed seller ratings

Popular categories from this store

Seller feedback (832)

Product ratings and reviews

Most relevant reviews

SB6121 PREMOD Forceware v1.4b-mod2

You get what you pay for

Older model but still supported

Cable Modem SB6121

Streaming demon

More to explore :

Shop Top Sellers and Highly Rated Products in Modems

Best Sellers

Top Rated

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