7. Log in to the modem router.
Launch a web browser and enter http://routerlogin.net or http://192.168.0.1 in the address
field of the web browser.
When prompted, enter admin for the user name and password for the password.
8. Activate your Internet service.
For information about how to activate your Internet service, see Activate Your Internet Service on
the other side of this quick start guide.
Activate Your Internet Service
To activate your Internet service:
1. Visit your cable Internet provider’s website and follow the onscreen instructions to activate your
Internet service.
Cable Internet Provider / Contact Information
Bright House Networks
http://support.brighthouse.com
1-866-898-9101
Cablevision
http://www.cablevision.com
https://install.optimum.com/JointInstall/
Telephone number depends on your region.
Comcast XFINITY
http://www.comcast.com/activate
http://www.xfinity.com/internetsetup
http://www.xfinity.com/internetsupport
1-800-XFINITY (1-800-934-6489)
Cox
https://activation.cox.net/selfactivation/start.cox
1-888-556-1193
Mediacom
https://maestro.mediacomcc.com/walledgarden/page/login.jsp
1-844-2SIMPLE (1-844-274-6753)
Time Warner Cable
https://elb02.activatemymodem.com/authentication
1-800-892-2253
Note: Your cable Internet provider’s contact information might change. You can also find the
contact information in your monthly Internet service billing statement.
2. If you are unable to activate your Internet service using the instructions on your cable Internet
provider’s website, call your cable Internet provider and do the following:
a. When asked, provide your account information and provide the modem router’s model
number, which is C7800, serial number, and MAC address.
The serial number and MAC address are on the modem router label.
b. Wait for your cable Internet provider to confirm that your modem router is active.
c. If you do not get an Internet connection with the modem router, ask your cable Internet
provider to look for your modem router online, and do one of the following depending on what
your cable
Internet provider tells you about your modem router:
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