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Quick Start

AC2400 WiFi Cable Modem Router

Model CAX25

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.

Support and Community

The following table lists support contact information for cable Internet providers 
that support your modem router. 

Cable Internet Provider

Support Contact Information

Cox

https://www.cox.com/residential/support/home.html 

https://www.cox.com/activate

 

1-888-556-1193

Mediacom

https://support.mediacomcable.com

 

1-855-Mediacom (1-855-633-4226)

Optimum

https://www.optimum.net/support/contact-us 

https://install.optimum.com/JointInstall

 

1-877-810-6750

Sparklight

https://support.sparklight.com

 

1-877-692-2253

Spectrum

https://www.spectrum.net/contact-us 

https://activate.spectrum.net

 

1-833-267-6094

Xfinity

https://www.xfinity.com/support/articles/activate-purchased-modem

 

http://xfinity.com/activate

 

1-800-XFINITY (1-800-934-6489)

LED

Description

Power

• 

Solid white

. The modem router is receiving power and is functioning 

normally.

• 

Off

. The modem router is not receiving power.

• 

Solid red

. The modem router is too warm and might overheat.

Downstream

• 

Solid amber

. One downstream channel is locked.

• 

Solid white

. Two or more downstream channels are locked.

• 

Blinking white

. The modem router is scanning for a downstream channel.

• 

Off

. No downstream channel is locked

Upstream

• 

Solid amber

. One upstream channel is locked.

• 

Solid white

. Two or more upstream channels are locked.

• 

Blinking white

. The modem router is scanning for a upstream channel.

• 

Off

. No upstream channel is locked.

Online

• 

Solid white

. The modem router is online.

• 

Blinking white

. The modem router is synchronizing with the cable 

provider’s cable modem termination system (CMTS).

• 

Off

. The modem router is offline.

2.4 GHz radio

• 

Solid white

. The 2.4 GHz WiFi radio is operating.

• 

Blinking white

. The modem router is sending or receiving WiFi traffic.

• 

Off

. The 2.4 GHz WiFi radio is off

5 GHz radio

• 

Solid white

. The 5 GHz WiFi radio is operating.

• 

Blinking white

. The modem router is sending or receiving WiFi traffic.

• 

Off

. The 5 GHz WiFi radio is off.

LAN 1–4

The LED color indicates the connection speed: white for Gigabit Ethernet and 

amber for 100 Mbps or 10 Mbps Ethernet.
• 

Solid

. A powered-on device is connected to the port.

• 

Blinking

. The port is sending or receiving traffic.

• 

Off

. No device is connected to this port.

USB

• 

Solid white

. A USB device is connected and ready.

• 

Blinking white

. A USB device is plugged in and trying to connect.

• 

Off

. No USB device is connected

WiFi On/Off 

button

Pressing this button for two seconds turns the WiFi radios on and off. If this LED 

is lit, the WiFi radios are on. If this LED is off, the WiFi radios are turned off and 

you cannot use WiFi to connect to the modem router.

WPS

 button

This button lets you use WPS to join the WiFi network without typing the WiFi 

password. The WPS LED blinks during this process and then lights solid. 

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

LED On/Off 

button

Pressing this button for two seconds turns the LEDs on and off.

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