NETGEAR CAX25 AC2400 WI-Fi Cable Modem Router User Guide
- June 5, 2024
- NETGEAR
Table of Contents
NETGEAR CAX25 AC2400 WI-Fi Cable Modem Router
Download the Nighthawk app to get started
For more information about the Nighthawk app, visit Nighthawk-app. com. Set up your modem router and activate your Internet service with the Nighthawk app.
If you don’t want to use the Nighthawk app, set up your modem router using the
instructions in Set up and activate using the modem router web interface.
BEFORE RETURNING THIS PRODUCT TO THE STORE FOR
ANY REASON, call NETGEAR Technical Support at
1-866-534-9377 or visit
https://kb.netgear.com/000061156/How-can-I-troubleshoot-my-cable-
modem. 
LED/DESCRIPTION
Support and Community
Visit netgear.com/support to get your questions
answered and access the latest downloads.
You can also check out our NETGEAR Community for helpful advice at
community.netgear.com.
Customer-owned cable devices might not be compatible with certain cable
networks. Check with your cable Internet provider to confirm that this NETGEAR
cable device is allowed on your cable network.
If you are experiencing trouble installing your modem router, contact NETGEAR
at 1-866-874-8924.
The following table lists support contact information for cable Internet
providers that support your modem router. 
Package contents
-
Turn off and disconnect existing modems and routers.
-
Connect a coaxial cable.
Use a coaxial cable to connect the cable port on the modem router to a cable wall outlet. Make sure that the cable is tightly connected. We recommend that you connect your cable modem directly to a cable wall outlet.
If you must share the connection, use a 3.5dB (1 to 2) splitter. -
Connect the power adapter.
Connect the power adapter to the modem router and plug the power adapter into a power outlet. -
Wait for the Online LED to light solid white.
This process might take up to 10 minutes. When the cable modem comes online, the Online LED stops blinking and lights solid white for at least a minute.
After 10 minutes, if the Online LED doesn’t light solid, make sure that the cable outlet is working, or call your Internet service provider (ISP) to make sure you have service.
Note: When the Online LED lights solid, your modem router is not connected to the Internet yet. You must connect a router or computer to your cable modem, and then activate your cable modem with your cable Internet provider. -
Connect your computer or mobile device to the modem router with WiFi or Ethernet.
- WiFi. Use the WiFi network name (SSID) and password on the product label to connect.
- Ethernet. The computer must have an Ethernet port. Connect an Ethernet cable to an Ethernet port on the modem router and the Ethernet port on your computer.
-
Collect the following information:
- Your cable Internet provider (ISP) account information
- Cable modem model number, which is CAX25
- Cable modem serial number
- Cable modem MAC address
-
Activate your Internet service:
The following table lists the activation contact information for cable Internet providers that support your modem router.
Your ISP’s contact information might change. You can also find the contact information in your monthly Internet service billing statement.
Note to CATV system installer: This reminder is provided to call the CATV systems installer’s attention to Section 820-93 of the National Electrical Code, which provides guidelines for proper grounding and, in particular, specifies that coaxial cable shield shall be connected to the grounding system of the building as close to the point of cable entry as practical.
Regulatory and Legal
For regulatory compliance information including the EU Declaration of
Conformity, visit https://www.netgear.com/about/regulatory/.
See the regulatory compliance document before connecting the power supply.
For NETGEAR’s Privacy Policy, visit https://www.netgear.com/about/privacy-
policy.
By using this device, you are agreeing to NETGEAR’s Terms and Conditions at
https://www.netgear.com/about/terms-and-conditions. If you do not agree,
return the device to your place of purchase within your return period.
© NETGEAR, Inc., NETGEAR and the NETGEAR Logo are trademarks of NETGEAR, Inc.
Any non-NETGEAR trademarks are used for reference purposes only.
NETGEAR, Inc.
350 East Plumeria Drive San Jose, CA 95134, USA
NETGEAR INTERNATIONAL LTD
Floor 1, Building 3
University Technology Centre Curraheen Road, Cork, T12EF21, Ireland
References
- English - NETGEAR Communities
- NETGEAR Support | NETGEAR
- Xfinity Activation
- Spectrum - Activation Home
- Optimum | Internet Self-Install
- How do I troubleshoot my NETGEAR cable modem? | Answer | NETGEAR Support
- Xfinity Activation
- MediacomCable – Mediacom Communications
- Sparklight Support
- Pardon Our Interruption
- NETGEAR Terms and Conditions | NETGEAR
- Contact Optimum, Find a Store Location | Optimum
- Spectrum.net
- How to activate your Xfinity Internet and Voice services - Xfinity Support