An ethernet cable for connecting the modem to your computer The cable modem’s power adapter A coaxial cable for connecting the modem to the cable line

Before you plug a modem, read the voltage rating on the adapter to make sure that it matches your outlet. Doing so will help avoid shorting any circuits. As it boots up, the lights on the cable modem will blink, telling you that it’s trying to connect to the ISP’s server. Once the cable modem establishes a connection, the lights will become steady.