Jun 1, 2011 · When you choose an ARRIS SURFboard, you’re joining a 60-year legacy of innovation from the company that invented digital TV and brought wireless Internet into the …

Introduction 1 The Motorola® SURFboard® SB6121 DOCSIS® 3.0 Cable Modem provides high-speed Internet access to the Internet and other online services. You can use your high-speed …

This guide provides a product overview and instructions for installing and configuring your SB6121 Cable Modem to get it up and running on your home network. Note: Microsoft no longer …

Utilizing the power of DOCSIS 3.0, the SB6121 enables channel bonding of up to four downstream channels and four upstream channels, which allows an operator to offer their …

Enjoy a strong connection to your favorite content with the ARRIS Motorola SB6121 Surfboard DOCSIS 3.0 Cable Modem. It gives you four upstream and downstream channels with more …

Connect the Ethernet cable to the Ethernet port on the computer or router and to the Ethernet port on the back of the SB6121 cable modem. NOTE: A typical setup for Internet access consist of …

Jul 22, 2025 · Motorola SURFboard SB6121 is a DOCSIS 3.0 cable modem that provides high-speed internet access via a cable connection. It features download speeds of up to 343 Mbps, …

This document was developed to assist all Technical Operations employees with the proper steps of installing, configuring, and troubleshooting the Motorola SB6121 modem.

Read all of the instructions listed here and/or in the user manual before you operate this device. Give particular attention to all safety precautions. Retain the instructions for future reference.

It also provides instructions for installing the cable modem and configuring the Ethernet, router, DHCP, and security settings.