Netgear CM1200 Nighthawk Cable Modem user manual
- June 7, 2024
- Cox
Table of Contents
Netgear CM1200 Nighthawk Cable Modem
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Modem Information
DOCSIS 3.1 Cable Modem
32×8 channel bonding
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Highest Service Level
Gigablast
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Front View
| | After the cable modem successfully registers on the network, the Power
, Upstream , Downstream , and Internet indicators illuminate
continuously to indicate that the modem is online and fully operational. For
more details, refer to the Modem Lights section.
| |
Back View
| | The Netgear CM1200 has the following ports available on the back of the modem.
- Reset Button – Use this button in the unlikely event that 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 coaxial cable line to this port.
- Power On / Off Button
- Power Adapter Input – Connect the supplied power cord to this port.
| |
MAC Address
| | MAC addresses are written as a unique set of 12 characters containing both letters and numbers (0-9, A-F). The first six characters of the MAC address are unique to the manufacturer of the device.
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
| Off| No power. Verify all cable connections and try resetting the modem. If
cable is OK and 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.
- Make sure that the cable modem is placed in a location with good ventilation.
- Reconnect the power adapter.
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| Downstream channel inactive. Verify all cable connections and try
resetting the modem. If cable is OK and modem reset does not work, contact
Customer Support.
Upstream
| Off| Upstream channel inactive. Verify all cable connections and try
resetting the modem. If cable is OK and 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
| Off| Modem offline. Verify all cable connections and try resetting the
modem. If cable is OK and 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 cable is OK and modem reset does
not work, contact Customer
Support.
Solid Green| None. Operational.
LAN 1-4
| 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 is transmitting or receiving
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.
Manufacturer Resources
- Netgear_CM1200_QSG [PDF]
- Netgear_CM1200_Manual [PDF]
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