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Quick Start

AX8 WiFi Cable Modem Router

Model CAX80

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 an 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.

Multi-Gig 

Ethernet

The LED color indicates the speed: blue for a 2.5 Gbps Ethernet connection, 

white for a 1 Gbps Ethernet connection, and amber for a 100 Mbps Ethernet 

connection.
• 

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.

Ethernet

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

and amber for a 100 Mbps Ethernet connection or a 10 Mbps Ethernet 

connection.
• 

Solid

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

• 

Blinking

: The port is sending or receiving traffic.

• 

Off

: No device is connected to this Ethernet port.

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.

LED

Description

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.

Button

Description

WiFi button

Pressing this button for two seconds turns the 2.4 GHz and 5 GHz WiFi radios 

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

radios are off and you cannot use WiFi to connect to the modem router.

WPS button 

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

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

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.

Cable Internet 
Provider

Support and Activation 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/internetsetup

 

Use the Xfinity app for Xfinity activation and then use the NETGEAR 

Nighthawk app for router installation.

Secure your devices with 

NETGEAR Armor™ 

Tap the 

Security

 icon in your 

Nighthawk app to verify that 
NETGEAR Armor is activated. 
Your Nighthawk comes with 
NETGEAR Armor cybersecurity. 
Armor blocks online threats like 
hackers and phishing attempts on 
your devices.

Download the 

Nighthawk app to install 

your modem router

On your mobile phone, 
download the Nighthawk app 
and follow the setup instructions.

If you don’t want to use the 
Nighthawk app, see the other 
side of this Quick Start guide.

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