The ARRIS / Surfboard SB6121 has the following ports available on the back of the modem. ETHERNET - Connects to the Ethernet port on your computer; CABLE - Connects to the cable wall outlet; POWER - Connects the cable modem to the power adapter : MAC Address. Click to enlarge.

Jul 01, 2012 · These problems were seen by actual customers of the modem - Motorola Surfboard SB6121 keeps resetting / rebooting every couple of minutes, hence unable to register the modem with Comcast. The SB6121 doesn't tolerate signal issues (noise, weak signal) as much as the older ones like SB6120. Resetting the SB6121 to its factory default configuration will remove all stored parameters learned by the SB6121 during prior initializations. The SB6121 can be reset to the factory default configuration using the web interface. NOTE: The initalization process may take 5 to 30 minutes. Resetting the SB6121. Disconnect the coaxial cable. Mar 09, 2018 · Technically the SB6121 should be good for up to 170mbps-ish in perfect conditions. Technically. 100mbps is more realistic with "good" conditions. Once an ISP decides to stop supporting a device, they can make configuration changes that effectively neuter your modem to force you to buy a new one. View and Download Motorola SURFboard SB6121 user manual online. SURFboard SB6121 DOCSIS 3.0 Cable Modem. SURFboard SB6121 modem pdf manual download. If Internet connection issues with the SB6121 arise, troubleshooting may resolve the issue, or may provide insight as to what is causing the issue. This document provides helpful information for troubleshooting connection issues with the SB6121. This document contains the following sections, to be followed in sequence:

Feb 17, 2015 · The modem we chose was the Arris/Motorola SB6121 because that is the model that Comcast was renting them. The product literature said it could deliver up to 172 Mbps down, which is way more speed

Aug 21, 2016 · In this tutorial I show you how to view the signal status of your Motorola or ARRIS SURFboard (SB6121) and troubleshoot any internet problems you may be having. I also show you a possible SOLUTION! Here you can see indications of issues that may be affecting your connection. If you see T3 or T4 timeouts, this may indicate problems with your connection that you will need to ask your service provider to address. Check the Motorola whitepaper Evaluating Your Cable Internet Connection at this link for more detailed information: Motorola SurfBoard SB6121 is a very popular option in the middle of the modems price range. It's in the top 3 bestselling modems and has dozens of popular alternatives in the same price range, such as Multi-Tech MT5656ZDX-V or Arris Surfboard SBG6700-AC. Motorola SurfBoard SB6121 is $8.10 more expensive than the average modem ($89.99). Forum discussion: I purchased a Motorola SB6121 from and TekSavvy phone support won't register it because I told them the firmware was Is that normal? I know their site says it

Building upon the success of the SB6120, Motorola's 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 100

View and Download Motorola SURFboard SB6121 installation manual online. DOCSIS 3.0 Cable Modem. SURFboard SB6121 modem pdf manual download. General faqs sb6121 front and back panel general faqs sb6121 front and back panel arris surfboard sb6121 arris surfboard sb6121. Whats people lookup in this blog: Motorola Surfboard Sb6121 Lights Meaning; Arris Surfboard Sb6121 Lights Meaning; What Do The Lights Mean On Motorola Surfboard Sb6121 Jul 12, 2017 · With that in mind, let’s take a look at how you can access the diagnostic page and what to do with the information you find therein. For demonstration purposes, we will be using the using the diagnostic interface of the incredibly common Motorola/Arris Surfboard 6141 broadband cable modem, but the general layout will be similar across modems.