Netgear CM1200 Nighthawk Cable Modem user manual


Front View Click to enlarge.		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 Click to enlarge.		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 Click to enlarge.		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.