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Support

Netgear CM1200

Details

     

Modem Information

DOCSIS 3.1 Cable Modem

32x8 channel bonding

Highest Service Level

Go Super Fast - 1-Gig
   

Front View

Image of Front of the Netgear CM2100

Click to enlarge.

After the cable modem successfully registers on the network, the Power, Upstream, Downstream, and Internet indicators continuously indicate that the modem is online and fully operational. For more details, refer to the Modem Lights section.
     

Back View

Image of back of the Netgear CM1200

Click to enlarge.

  

The Netgear CM1200 has the following ports available on the back of the modem.

  • Reset Button - Use this button if you want to restore the default factory settings. This button is recessed to prevent accidental resets of your modem.
  • LAN Gigabit Ethernet Ports - Provides internet access to a single device. Only one port is active at a time.
  • Cable / Internet Coaxial Cable Connector - Connect your cable line to this port.
  • Power On / Off Button
  • Power Adapter Input - Connect the supplied power cord to this port.
     

MAC Address

Image of Netgear CM1100 MAC Label

Click to enlarge.

  

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

Modem Lights

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

Modem Light Status Problem
Power

power		 Off No power. Verify all cable connections and try resetting the modem. If the cable is OK and the modem reset does not work, contact Customer Support.
Green None - Power is supplied to the cable modem.
Red The cable modem is too warm and might overheat:
  • Disconnect the power adapter.
  • Wait a couple of minutes to let the cable modem cool down.
  • Make sure that the cable modem is placed in a vertical position.
  • Ensure the cable modem is placed in a location with good ventilation.
  • Reconnect the power adapter.
Downstream

downstream
Solid Amber None. Connection established on one channel.
Blinking Green Scanning for additional downstream channels.
Solid Green None. Operating on more than one channel.
Off The downstream channel is inactive. Verify all cable connections and try resetting the modem. If the cable is OK and the modem reset does not work, contact Customer Support.
Upstream

upstream		 Off The upstream channel is inactive. Verify all cable connections and try resetting the modem. If the cable is OK and the modem reset does not work, contact Customer Support.
Blinking Green Scanning for additional upstream channels.
Solid Amber None. Connection established on one channel.
Solid Green None. Operating on more than one channel.
Internet

internet		 Off Modem offline. Verify all cable connections and try resetting the modem. If the cable is OK and the modem reset does not work, contact Customer Support.
Blinking Green None. Scanning for configuration parameters. Verify all cable connections and try resetting the modem. If the cable is OK and the modem reset does not work, contact Customer Support.
Solid Green None. Operational.
LAN 1-4

ethernet		 Off A device is not connected to the Ethernet port on the back. Connect a device to the Ethernet port on the back.
Blinking Green or Amber None. An Ethernet port transmits or receives data.
Solid Amber None. A device is connected to the Ethernet port at 10/100 Mbps.
Solid Green None. A device is connected to the Ethernet port at 1,000 Mbps.

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