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Netgear CM400

Details

     

Modem Information

DOCSIS 3.0 Cable Modem

8x4 channel bonding with speeds of up to 150 Mbps on a wired connection
 

Cox recommends a DOCSIS 3.0 16x4 or higher device for optimal Internet performance.

Highest Service Level

Preferred 100

   

Front View

Image of front view

Click to enlarge.

The Netgear CM400 is also available for purchase as a black device with amber lights.
 

If the Power LED is not solid green, check your power adapter connections.

     

Back View

Image of back view

Click to enlarge.

 

The Netgear CM400 includes the following connection ports:

    • POWER - Connects the cable modem to the power adapter
    • RESET - Restores factory settings
    • ETHERNET - Connects to the Ethernet port
    • CABLE - Connects to coaxial cable
     

MAC Address

MAC label

Click to enlarge.

 

MAC addresses are written as 12 digits containing both letters and numbers (0-9, A-F). A MAC address is unique. The first six characters of the MAC address are unique to the manufacturer of the device.

Troubleshooting

The lights indicate the current status of your cable modem. To troubleshoot any connection problems, use the table below.
 

Modem Light Status Problem
Power

Power light

Solid Green None.
Off No power. Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
Internet

Internet light

Solid Green None.
Blinking Green None. Scanning for configuration parameters - Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
Off Cable modem is offline. Verify all cable connections and try resetting the modem.
Upstream

Upstream light

Solid green None. One or more upstream channels are in use.
Blinking green None. Scanning for an upstream channel
Off No upstream channel is in use.
Downstream

downstream light

Solid green None. One or more downstream channels are in use.

Manufacturer Resources

For more detailed technical information on the CM400, use the resources below from Netgear.

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