CM1200
Activate Your Internet Service
You must set up your cable modem before activating your Internet service. For
more information, see Set Up the Hardware on the other side of this quick start
guide.
Before you start the self-activation process, collect the following information:
• Your cable Internet provider account information
• Cable modem model number, which is CM1200
• Cable modem serial number
• Cable modem MAC address
Your cable modem’s serial number and MAC address are on the cable modem
label. The following table lists contact information for cable Internet providers that
support your cable modem.
Cable Internet Provider Contact Information
Cablevision https://www.cableone.net/
1-877-MY-CABLE (1-877-692-2253)
Cox https://www.cox.com/activate
1-888-556-1193
Mediacom https://support.mediacomcable.com/
1-855-Mediacom (1-855-633-4226)
Optimum https://install.optimum.com/JointInstall/
1-877-810-6750
Spectrum
Xfinity https://register.xfinity.com/
Note: Your cable Internet provider’s contact information might change. You
can also find the contact information in your monthly Internet service billing
statement.
https://activate.spectrum.net/
1-(833) 267-6094
https://www.xfinity.com/support/articles/activatepurchased-modem
1-800-XFINITY (1-800-934-6489)
To activate your Internet service:
1. Visit your cable Internet provider’s website and follow the onscreen
instructions to activate your Internet service.
2. To determine the accurate Internet speed, visit your cable Internet provider’s
speed test website and perform a speed test.
Connect a Router
After you set up your cable modem and activate your Internet service, you can
disconnect the computer and connect a router to the cable modem.
To connect a router to the cable modem:
1. Reboot the cable modem by unplugging the power cable from the
cable modem and plugging it back in.
2. Wait for the Online LED to stop blinking and light solid green.
3. Use an Ethernet cable to connect the Ethernet port on the cable modem to
the WAN or Internet port on the router.
4. Power on the router.
5. Wait until the router is ready.
6. Connect a computer to the router.
For more information about how to set up your router, see the documentation
that came with your router.
Quick Start
Multi-Gig Speed Cable Modem
Model CM1200
Package Contents
Ethernet cable
Cable modem
Power adapter
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