Table 1. LED descriptions
Description
Icon
LED
• Solid white. Power is supplied to the cable modem.
• Off. No power is supplied to the cable modem.
• Solid red. The cable modem is too warm and might overheat. For
more information about this condition, see Use LEDs to Troubleshoot
on page 23.
Power
• Solid amber. One downstream channel is locked.
• Solid white. Two or more downstream channels are locked.
• Blinking white. The cable modem is scanning for a downstream
channel.
• Off. No downstream channel is locked.
Downstream
• Solid amber. One upstream channel is locked.
• Solid white. Two or more upstream channels are locked.
• Blinking white. The cable modem is scanning for an upstream
channel.
• Off. No upstream channel is locked.
Upstream
• Solid white. The cable modem is online.
• Blinking white. The cable modem is synchronizing with the cable
provider’s cable modem termination system (CMTS).
• Off. The cable modem is offline.
Online
• Solid white. A 1 Gbps connection is established.
• Solid amber. A 10 Mbps or 100 Mbps connection is established.
• Blinking white or amber. The port is sending or receiving traffic.
• Off. No device is connected to the port.
Eth1 and Eth2
Rear Panel
The connections and button on the rear panel are shown in the following figure.
User Manual
6
Hardware Setup
Nighthawk CM2500 Cable Modem
