NETGEAR CM400 User Manual page 10

Cable Internet Provider Contact Information
Charter
Comcast
Cox
Optimum
Time Warner Cable
Note: The contact information listed might change. You can also find the
contact number in your monthly Internet service billing statement.
2. When asked, provide the cable modem's serial number and MAC address, which are on the
product label (see Product Label
3. Wait for your cable Internet provider to confirm that your cable modem is active.
4. If you do not get an Internet connection with the cable modem, ask your cable Internet
provider to look for your cable modem online, and do one of the following depending on
what your cable Internet provider tells you about your cable modem:
• If the cable modem is not visible, your cable Internet provider can give you instructions
to verify why the cable modem does not connect with your high-speed Internet
service.
• If the cable modem is visible to your cable Internet provider, reboot the computer,
laptop, router, or WiFi router that is connected to the cable modem. Try checking your
online status again.
CM400 High Speed Cable Modem
1-888-438-2427
install.charter.com
1-800-COMCAST (1-800-266-2278)
comcast.com/activate/
1-877-891-2899
cox.com/residential/home.cox
play.optimum.net
optimum.net/support/phone-list
Note: Optimum is a brand name of Cablevision.
1-800-892-2253
timewarnercable.com
on page 7).
Hardware and Internet Setup
10