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ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem - Retail Packaging - Black
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UPC 490560200185
REGISTERED: 08/21/18
UPDATED: 04/04/20

ARRIS SURFboard SB6121 4x4 DOCSIS 3.0 Cable Modem -Retail Packaging-Black


Specifications
  • ARRIS SURFboard SB6121 4x4 DOCSIS 3.0 Cable Modem -Retail Packaging-Black available on March 24 2019 from Amazon for 33.50
  • UPC bar code 490560200185 ξ1 registered March 18 2015
  • Product category is Electronic
  • Manufacturered by Motorola
  • SB6121

  • Product color is Black

  • Product weight is 1.52 lbs.
Compatible with Time Warner Cable, Charter, Cox, Cablevision, and more Not compatible with Verizon FiOS or AT&T U-verse, no longer approved by Comcast Xfinity Requires Cable Iternet Service, if not sure your provider is CABLE call them to confirm BROWN BOX models NOT VALID for this item when sold as New, should report to Amazon immediately and RETURN to Seller Wired modem only, does NOT include WIFI Router or VOIP Telephone adapter. Gigabit Ethernet port to connect to computer or Router for fast downloads. Internet speeds based on your Cable providers service - up to 172 Mbps download and 131 Mbps upload. 4 Download and 4 Upload Channels. A new and improved version of the world's most widely deployed DOCSIS cable modems. For the residential cable subscriber who wants a powerful modem capable of delivering a high-speed data service at blazing fast speeds.10 / 100 / 1000 Base-T Ethernet Port (RJ-45) and 1-Year Limited Warranty. Additional information: • 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

References
    ^ (2013). ARRIS SURFboard SB6121 4x4 DOCSIS 3.0 Cable Modem -Retail Packaging-Black, Motorola. Amazon. (revised Mar 2019)

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   Out of nowhere, I was having excruciatingly slow internet speed on Comcast. The Comcast tech advised that my Motorola SB 4100 was at the "end of life" and that I should upgrade. Skeptical, I purchased this modem which is a DOCSIS 3.0 (and backwards compatible) modem. It worked. I went from a 2mbps download speed to over 17mbps. What a difference. There was one installation glitch that you need to be aware of. When you hook up the modem (connect t..
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