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When you pick an ARRIS SURFboard, you’re joining a 60-year legacy of innovation from the company that developed digital TV and brought wireless Web into the house with the first cable modem gateway. The SB6121 delivers your complete personal media experience, at extraordinary broadband speeds. That makes browsing, shopping, and downloading even more practical, much faster, and effective than before.

The Arris Motorola SB6121 is a terrific cable television modem that sports compatibility with a wide range of cable web providers. The SB6121 works with 9 of the 10 largest cable internet suppliers in the United States. In addition to its compatibility, this cable television modem has excellent efficiency marks and complies with all of the standards we look for in the best cable modems. The SB6121 is similar to the SB6141, the top item on our lineup, in almost every way. The only real difference is that the SB6121 has 4 x 4 channel bonding rather of the SB6141’s 8 x 4 channel bonding.

The SB6121 has a maximum theoretical download speed of 172 Mbps and an upload speed of 131 Mbps. If you do subscribe to your internet service provider’s greatest speed tiers, then you may want to look at cable television modems that are capable of greater speeds.

We were impressed with the SB6121’s average operating temperature level. At 87.7 degrees Fahrenheit, the SB6121 has among the most affordable operating temperatures we measured in our testing. This is good news, because it implies that the SB6121 efficiently deals with the power it draws from your wall outlet. A lower operating temperature can likewise imply a longer life for the SB6121. That’s really true for just about any electronic gadget. You want them to run as cool as possible.

– 4X Faster than DOCSIS 2.0
– Download speeds up to 172 Mbps
– DOCSIS 3.0 Cable Modem
– 4 download & 4 upload channels
– Supports IPv4 and IPv6– the current Web standard
– Suitable with all U.S. Cable Providers
– Gigabit Ethernet Connectivity

As part of Motorola DOCSIS 3.0 Ultra-Broadband family of products, the SB6121 consists of an improved tuner that supports up to a 1 GHz downstream input, which allows operators to increase the frequency spectrum for release of new high-value services, such as bandwidth on-demand, industrial services, interactive video gaming, and IPTV, to their customers. The SB6121 features a 10/100/1000Base-T Ethernet (RJ-45) port, in addition to intuitive, easy-to-read front-panel functional status LEDs. Operators can additionally activate double colored LEDs for their customer to have visual confirmation of bonded channels and GigE link use.

– Brand name: Motorola
– Model: 575319-019-00
– Condition: New
– Manufacturer_part_number: sb6121
– Interface Type: 10/100/1000Base-T, Fast Ethernet, Gigabit Ethernet
– Assembled Product Dimensions (L x W x H): 5.80 x 1.70 x 8.00 Inches

This cable television modem works with practically every significant cable television web service provider.

There isn’t a power button, which indicates you’ll have to unplug the modem to power it down.

The Arris Motorola SB6121 is a terrific cable modem that will work well for many people. If you have an extremely fast internet connection, you might want to look somewhere else.