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Netgear CMD31T

Last Updated: Mon, 05 Jan 2015 > Related Articles

22 rated this

Summary

Learn about the available ports and an explanation of the status lights on a Netgear CMD31T cable modem.

Solution


Installation

 

If you need help setting up your cable modem, refer to the following articles.


The Netgear CMD31T is a DOCSIS 3.0 cable modem.


Front View 

Initially it will take at least 15 minutes for your Netgear CMD31T cable modem to be successfully registered on the network. After the modem registers with the Cable Internet Service Provider, the following LEDs should be lit:


POWER: solid green

ONLINE: solid green


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


For more details, refer to the Modem Lights section.

Back View 



The Netgear CMD31T has the following ports available on the back of the modem:

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

Modem Lights 


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

Modem LightStatusProblemSolution
POWERSolid GreenNoneN/A
OffNo powerVerify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
ONLINE (Cable Link)Blinking GreenNoneN/A
OffCable modem off-lineVerify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
US
(Upstream)
1/2 solid amberNone - Upstream channel 1 in useN/A
1/2 solid greenNone - Upstream channel 1 and 2 in useN/A
3/4 solid amberNone - Upstream channel 1, 2 and 3 in useN/A
3/4 solid greenNone - Upstream channel 1, 2, 3 and 4 in useN/A
OffNo Upstream channel in useN/A
DS (Downstream)1/2 solid amberNone - Upstream channel 1 in useN/A
1/2 solid greenNone - Upstream channel 1 and 2 in useN/A
3/4 solid amberNone - Upstream channel 1, 2 and 3 in useN/A
3/4 solid greenNone - Upstream channel 1, 2, 3 and 4 in useN/A
OffNo upstream channel in useN/A
ETHERNETSolid GreenNone - a device is connected and detected on the 1-Gbps Ethernet PortN/A
Blinking GreenNone - data traffic on the 1-Gbps Ethernet portN/A
OffNo devices detected on the Ethernet portVerify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.

MAC Address Label 



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.


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