ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem

The household internet plan was upgraded to gigabit service, and the rented modem sitting in the closet cannot carry it. This is where the ARRIS SURFboard SB8200 comes in, a DOCSIS 3.1 cable modem built to handle plans running up to 1 Gbps across 4 OFDM channels.

• Two 1 Gigabit Ethernet ports for a Wi-Fi router or a wired device

• Power supply, quick-start guide and a 2-year warranty card in the box

• Housing built from plastic and metal, with no telephone port

• Setup runs through the SURFboard Central app after the unit is plugged in

The modem is approved for use with Comcast Xfinity, Cox, Charter Spectrum and other major U.S. cable providers. Since certification terms differ between companies, confirm the SB8200 appears on your own provider's approved equipment list before ordering.

Placement matters more than most people expect with a cable modem. Positioning the SB8200 near the coaxial wall outlet keeps the coax cable short, which reduces signal loss before it even reaches the modem. A shelf or cabinet with some airflow around the unit is preferable to an enclosed space, since the hardware runs continuously and benefits from passive cooling. When storing the unit during a move or a provider switch, keeping the original box protects the Ethernet ports and the coax connector from dust and physical damage.

When comparing DOCSIS 3.1 modems, the two Ethernet ports on this unit are worth singling out because most modems in this class ship with only one. That second port allows a direct wired connection to a single device alongside the router, useful in a home office setup where a desktop needs a dedicated line. The SB8200 suits renters and homeowners who are already paying for a gigabit plan and want to stop paying monthly modem rental fees, as well as anyone upgrading from an older DOCSIS 3.0 device that was choking the connection speed the provider was already delivering.