Connect your Cable Modem to a Computer

Note: Before you connect the cable modem and contact your cable Internet service provider, you should have your cable account number, account phone number, and login information (your email address or user name and password) available.

1. Turn off your existing modems and routers.
   If you are replacing a modem that is currently connected in your home, unplug that modem and plug the new cable modem into the same outlet.
   
   
2. Connect the coaxial cable.
   Use the coaxial cable provided in the package to connect the coax cable port on the rear panel of the cable modem to a cable wall outlet or a line splitter. Make sure that the cable connection is hand-tightened to secure the connection.
   
   
3. Connect the power adapter provided in the package to the Power port on the cable modem and plug the other end of the power adapter into an electrical outlet.
   When the start-up procedure is completed, the Power LED lights will be solid green.
   
   
4. Wait for the cable modem to come online.
   It can take up to 10 minutes for the cable modem to come online on your network. During this time, the LED behavior is as follows:
   -The Downstream LED lights blinks green when more searching for a downstream frequency.
   -The Downstream LED lights solid green when a downstream channel is successfully connected.
   -The Upstream LED lights blinks green when searching for an upstream frequency.
   -The Upstream LED lights solid green when one upstream channel is successfully connected.
   
   After the cable modem registers with your cable Internet provider, the Online LED lights solid green.
   
   
5. Turn off the computer to which you intend to connect the cable modem.
   
   
6. Use the Ethernet cable provided in the package to connect one of the LAN ports on the rear panel of the cable modem to an Ethernet port on your computer.
   
   
7. Turn on your computer.
   

Activating your Internet Service

1. Visit your cable Internet provider’s website and follow the instructions to activate your Internet service.
   

   Cable Internet Provider	Contact Information
   Comcast XFINITY	https://register.xfinity.com https://xfinity.com/support/articles/activate-purchased-modem 1-800-XFINITY (1-800-934-6489)
   Spectrum	https://activate.spectrum.net 1-833-267-6094

   
   
   

Please Note: Your cable Internet provider’s contact information may change. You can find the current contact information in your monthly Internet service billing statement.

1. You may be asked to provide your account information and your cable modem’s model number, serial number, and MAC address. The serial number and MAC address are on the product label on the rear panel of your cable modem.
   
   
2. Your cable Internet provider will need to confirm that your cable modem is active.
   
   
3. If you do not get an Internet connection with your cable modem, ask your cable Internet provider to verify if your cable modem is online.
   
1. If the cable modem is not visible to your Internet provider, your cable Internet provider can give you instructions to verify why the cable modem does not connect with your high-speed Internet service.
   
2. If the cable modem is visible to your cable Internet provider, reboot your cable modem and check your online status again.

Perform a Speed Test

Connect your Cable Modem to a Router After Installation and Activation

1. Reboot your cable modem by unplugging the power cable from the cable modem and plugging it back in.
   
   

   Note: Do not disconnect your cable modem from the cable wall outlet.
   
   
   When the start-up procedure is completed, the Power LED will turn solid green. This may take a few minutes to stop blinking and light solid green.
   
   
   
2. Use an Ethernet cable to connect the Ethernet port on your cable modem to the WAN or Internet port on your router.
   
   
3. Power on the router.
   Wait until the router is ready (check your router’s instruction manual to determine when its ready).
   
   
4. Connect a computer to the router over a WiFi connection or with an Ethernet cable to a LAN port on the router.