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Arris / Motorola SURFboard SB5101U DOCSIS 2.0 Cable Modem - Retail Packaging

by Motorola
4.4 out of 5 stars  See all reviews (875 customer reviews)

List Price: $79.99
Price: $46.90 & FREE Shipping. Details
You Save: $33.09 (41%)
  Special Offers Available
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In Stock.
Sold by BlueProton and Fulfilled by Amazon. Gift-wrap available.
Want it Friday, June 21? Choose One-Day Shipping at checkout. Details
  • Requires CABLE Internet Service, if not sure your provider is CABLE call them to confirm
  • Compatible with ALL Major CABLE providers like Comcast, Cox, Charter, Time Warner, Mediacom, Bright House
  • Internet download speeds up to 38 Mbps and upload speeds up to 30 Mbps based on your Cable provider service
  • Front-panel LEDs indicate status and simplify troubleshooting
  • 10/100 Ethernet port to connect with router or computer
  • BROWN BOX models NOT VALID for this item, should report to Amazon immediately and RETURN to Seller
  • Docsis 2.0 with backward compatibility with 1.x
  • Good for basic streaming SD Video and multiple users.
Looking to Combine Your Modem and Wireless Router?
The Motorola SURFboard Gateway SBG901 wireless cable modem is a fully integrated all-in-one home networking solution that combines the functionality of a DOCSIS 2.0 cable modem with a 802.11 Wi-Fi access point. Learn more

Frequently Bought Together

Arris / Motorola SURFboard SB5101U DOCSIS 2.0 Cable Modem - Retail Packaging + Medialink - Wireless N Broadband Router - 150 Mbps - 2.4GHz - 802.11n w/ Internal Antenna
Price for both: $96.89

Buy the selected items together


Special Offers and Product Promotions


Technical Details

  • Front-panel LEDs indicate status and simplify troubleshooting
  • Optional Installation Assistant available (models SB5101U/UE) on CD-ROM guides users through installation on the PC
  • Optional 1.1 USB data port available (models SB5101U/UE)
  • Stylish and space-saving enclosure
  • Backward-compatible with DOCSIS/EuroDOCSIS 1.x
  See more technical details

Product Details

  • Product Dimensions: 6.9 x 2.7 x 10.5 inches ; 1.6 pounds
  • Shipping Weight: 1.8 pounds (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B002M3SHXA
  • Item model number: SB5101U
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (875 customer reviews)
  • Amazon Best Sellers Rank: #212 in Electronics (See Top 100 in Electronics)
  • Date first available at Amazon.com: September 14, 2004

Product Description

From the Manufacturer

Enjoy a super-fast broadband connection with an Environmentally-Friendly Cable Modem.
Get more out of your time online and feel good about using a Green cable modem. Surf the Web and view pages quickly, download video with blazing speed and play online games faster than your opponents with this SURFboard cable modem. Up to 100 times faster than traditional dial-up. No dialing up – no phone line required. Easy-to-install and simple-to-use



Motorola SURFboard® SB5101U Cable Modem


Easy to Install, Activate, and Use.


Product Features
  • Environmentally-Friendly
  • All packaging products are made from recycled materials
  • The shipping carton is made of recycled corrugated material
  • 100% of package contents is created from recycled materials
  • Energy Star Compliant
  • Smaller Power Supply (PWB) for reduced environmental impact
  • USB and Ethernet connectivity to help ensure compatibility with almost any PC or Mac network-ready system
  • Supports up to 63 users (with additional networking hardware; not included)
  • No telephone lines needed; always on, always connected
  • 10/100Base-T Ethernet for blazing speed; capable of downloading at speeds up to 100 times faster than a standard 28.8Kbps analog phone modem


  • High-Speed Internet is as Easy as 1,2,3



    Additional Features
    • Downstream data speeds up to 38 Mbps
    • Upstream data speeds up to 30 Mbps
    • Internet Protocol version 6 (IPv6) Ready - Next-generation Internet Protocol
    • Front-panel status LEDs and user-friendly online diagnostics page for quick and easy troubleshooting
    • Compatible with Windows, Macintosh and Unix systems
    • Integrated DOCSIS 2.0 A-TDMA and S-CDMA technology; backwards compatible with existing DOCSIS 1.0 and 1.1 systems
    • Remote configuration and monitoring from the headend using SNMP and TFTP
    • Includes USB and Ethernet cables, power adapter and installation CD-ROM
    • Note: Ask your cable company if they support DOCSIS cable modems. DOCSIS (Data Over Cable Service Interface Specification) is the industry standard for cable-based Internet access service.
    • 2-year limited warranty


    What’s in the Box
    Inside the Box - Motorola SB5101U SURFboard Cable Modem,Installation CD-ROM with USB drivers,Power,adapter,Ethernet cable,Quick Start Guide,Warranty card

    Product Description

    Enjoy a super-fast broadband connection with a-Friendly Cable Modem.
    Get more out of your time online and feel good about using a Green cable modem. Surf the Web and view pages quickly, download video with blazing speed and play online games faster than your opponents with this SURFboard cable modem. Up to 100 times faster than traditional dial-up. No dialing up – no phone line required. Easy-to-install and simple-to-use



    Motorola SURFboard® SB5101U Cable Modem


    Easy to Install, Activate, and Use.


    Product Features
  • Environmentally-Friendly
  • All packaging products are made from recycled materials
  • The shipping carton is made of recycled corrugated material
  • 100% of package contents is created from recycled materials
  • Energy Star Compliant
  • Smaller Power Supply (PWB) for reduced environmental impact
  • USB and Ethernet connectivity to help ensure compatibility with almost any PC or Mac network-ready system
  • Supports up to 63 users (with additional networking hardware; not included)
  • No telephone lines needed; always on, always connected
  • 10/100Base-T Ethernet for blazing speed; capable of downloading at speeds up to 100 times faster than a standard 28.8Kbps analog phone modem


  • High-Speed Internet is as Easy as 1,2,3



    Additional Features
    • Downstream data speeds up to 38 Mbps
    • Upstream data speeds up to 30 Mbps
    • Internet Protocol version 6 (IPv6) Ready - Next-generation Internet Protocol
    • Front-panel status LEDs and user-friendly online diagnostics page for quick and easy troubleshooting
    • Compatible with Windows, Macintosh and Unix systems
    • Integrated DOCSIS 2.0 A-TDMA and S-CDMA technology; backwards compatible with existing DOCSIS 1.0 and 1.1 systems
    • Remote configuration and monitoring from the headend using SNMP and TFTP
    • Includes USB and Ethernet cables, power adapter and installation CD-ROM
    • Note: Ask your cable company if they support DOCSIS cable modems. DOCSIS (Data Over Cable Service Interface Specification) is the industry standard for cable-based Internet access service.
    • 2-year limited warranty


    What’s in the Box
    Inside the Box - Motorola SB5101U SURFboard Cable Modem,Installation CD-ROM with USB drivers,Power,adapter,Ethernet cable,Quick Start Guide,Warranty card



    Customer Reviews

    Good value, easy to install and works great. Reid H. Klei  |  227 reviewers made a similar statement
    Save yourself money in the long run and buy this modem. ZacAttack  |  44 reviewers made a similar statement
    Most Helpful Customer Reviews
    336 of 354 people found the following review helpful
    Amazon Verified Purchase
    After being placed on hold for 10 minutes with technical support, I was informed that Comcast wouldn't activate it because I didn't buy it from an "authorized retailer". The interesting part is that Best Buy is the ONLY authorized retailer. I asked the tech support rep if it's an issue of trust with the Motorola brand (counterfeiting, shoddy equipment, etc...) and he just towed the company line and said, "sir, I'm sorry, but you need to purchase this from Best Buy and not Amazon.com". I was flabbergasted.

    As of the writing of this review, Best Buy is offering this same modem for $30 more than Amazon, and Comcast just raised their modem rental fees from $5 to $6.61 in my area. I can't help but wonder what kind of profit sharing setup they've got behind the scenes. This feels like marketplace manipulation, collusion, or some other anti-trust lawsuit waiting to happen.

    I'll probably try to call back in another day or two and claim that I bought it from Best Buy. Maybe I caught a tech support rep on a bad day. If not, this modem is getting returned. I just wish Comcast didn't have a monopoly over my cable/internet service -- I'd drop them in a heartbeat.

    EDIT: As posted below, I was able to successfully activate the modem via Comcast's Online Chat Support.
    Was this review helpful to you?
    115 of 119 people found the following review helpful
    5.0 out of 5 stars Great Buy! May 29, 2010
    By Nean
    Amazon Verified Purchase
    This modem was economical and very easy to install. I simply disconnected my old Comcast modem, connected my new Motorola Surfboard modem, and called Comcast to give them my MAC ID (located on the modem). Within five minutes I was connected to the internet with the same great speed!
    Was this review helpful to you?
    99 of 104 people found the following review helpful
    5.0 out of 5 stars Plug-and-Play easy, Energy Star rated Power Adaptor February 6, 2010
    Amazon Verified Purchase
    Works great. Easy, hassle-free setup, no software install required, just connect the cables, call your cable company to register the modem over the phone and you're done.

    This is the only Energy Star rated cable modem I could find. Power adaptor is compact and electronic--not a brick-- so it doesn't get hot or waste energy.
    Was this review helpful to you?
    45 of 46 people found the following review helpful
    4.0 out of 5 stars So Far, So Good October 2, 2012
    By John
    Amazon Verified Purchase
    I brought this modem to replace the one I had from Time Warner Cable after the free lease period ended. I am glad I did that since Time Warner recently announced that it would be raising those lease fees from $2.50 to $3.95. So far, so good. The modem was very easy to install. I just swapped out the old modem and connected the power card, coaxial cable, and ethernet/USB cable. (Note that the modem does not come with coaxial and ethernet or USB cables, so you will need to buy those unless you have them; you will also need a coaxial cable splitter if you want to connect a cable TV and cable modem to the same jack). The hardest part of the install was getting through to Time Warner Cable to provide the MAC address (long wait time) and then waiting for the registration to work its way through their system and become active (several hours). So far, I have been very pleased with the device. The modem works perfectly with my wireless router, and I have had very stable and reliable connections on all of my wireless devices. I also have not had to reset the modem once over the past week, unlike the one I had from Time Warner, which needed to be reset every other day or so. I returned the old modem to the cable company today. With the higher lease costs recently announced by company, I will recoup the purchase price in a year and avoid the feeling of being ripped off by the cable company when my bill comes each month.

    UPDATE FEBRUARY 2013: Six months after purchasing this product, I remain pleased. It is much better and more reliable than the one that Time Warner Cable had provided previously, and I only have had to reset the unit three or four times since purchasing it six months ago.
    Comment | 
    Was this review helpful to you?
    56 of 60 people found the following review helpful
    5.0 out of 5 stars Modem works great. February 6, 2010
    By D Wilk
    Amazon Verified Purchase
    I purchased this modem to replace my leased Comcast modem because they were going up once again. The setup was easy just plugged it up and called Comcast to give them the mac address. The worst part of the deal is that Com freaking cast has yet to take it off of my bill so hopefully it will be off this month with a credit.

    But the modem works great. But I also found that I could have gotten the same modem for a $1 difference from Walmart and not have to wait on the shipping.
    Was this review helpful to you?
    29 of 30 people found the following review helpful
    5.0 out of 5 stars Saved $25 and Comcast Approved March 20, 2012
    Amazon Verified Purchase
    I received the package yesterday and had this modem working inside of 20 minutes. I simply unhooked my old modem and followed the steps to hook this one up. I ran the installation guide CD and when I was done it displayed the 'Mac" address, told me that Comcast will need it and directed me to call them for activation. After the usual 10 minutes of them trying to get me to NOT talk to a real person I finally got someone on the line who asked me for the Mac address and boom everything worked perfectly. I then plugged the Ethernet cable back into my wireless router and the three lap tops, a couple of Roku's, a Blu Ray player and the wireless printer all worked great.
    I am not one to constantly check download speeds but I was getting some download interruptions with the last modem so I wanted to replace it with a newer model. Time will tell but so far I am very pleased with this item and for the price it is a super deal. For my application this gets 5 stars
    Amazon is incredible but you need to be on your toes. I had this item in my Cart and was ready to purchase it for $54.49. Somehow I deleted it from my Cart and ran a new search and came up with this exact same item in a so-called Environmentally Safe box for $29.00. There must be a catch. I had momentary buyer's remorse when I was waiting on the line with Comcast but absolutely not an issue. No catch and I saved $25.
    Remember this is a 2.0 DOCSIS modem not the 3.0 high speed one. I do not pay Comcast for their high speed internet service and my research said I do not need the 3.0 for the level of service that I have with them.
    So for about $30 you can own your own cable modem, eliminate the monthly rental fee and pay this off in about three or four months.
    ... Read more ›
    Comment | 
    Was this review helpful to you?
    Most Recent Customer Reviews
    5.0 out of 5 stars Works great, no problem activating on Comcast.
    I live in Baltimore and had no trouble at all getting comcast to activate my modem unlike some reviews here. Read more
    Published 1 day ago by Mark
    4.0 out of 5 stars Serves my purpose
    It serves my purpose. Its working & going strong (bought it 3 months back), no complains so far. Definitely recommended!
    Published 2 days ago by Chandrachur Mukherjee
    5.0 out of 5 stars Works well!
    Make sure you have the compatible set up for this product before buying. It works great and I would recommend it to everyone!
    Published 4 days ago by Alex
    4.0 out of 5 stars Works just fine
    No frills, no problems. We just wanted to replace the $3-4/mo charge we were getting from the cable company and this fit the bill!
    Published 5 days ago by Kelly Jo Gaul
    5.0 out of 5 stars Replaced TWC Leased Modem
    Great price for the same product I had to replace what TWC decided to start charging me to lease for something I had for over 7 years. Hopefully more TWC customers come your way.
    Published 5 days ago by Matthew M.
    5.0 out of 5 stars No more hastle with the cable company!
    We did not want to rent the modem from the cable company, so
    we looked on line for the recommended compatible models. Read more
    Published 6 days ago by lovetoshop
    5.0 out of 5 stars Simple hookup
    I had no problem hooking this up. It has worked great. I don't have the highest speed internet but it works faster than the service I pay for. Read more
    Published 9 days ago by floresfamilynic
    1.0 out of 5 stars Didn't work
    3 hours on phone with comcast & couldn't get this modem to work. The first problem was that it was already registered to someone else. Read more
    Published 10 days ago by Surf
    5.0 out of 5 stars Awesome
    So far so good. It has been a month now ... great product. I would definitely recommend people to buy this motorola product
    Published 11 days ago by Parikshit
    4.0 out of 5 stars Good value
    We switched from AT&T when they would not give us a better deal. Went with TWC and opted to get this modem instead of renting from them. Read more
    Published 12 days ago by Pamela Gardner
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