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Hardware and Internet Setup
6
CM400 High Speed Cable Modem
You can use the LEDs to verify status and connections. The following table lists and
describes each LED on the front panel of the cable modem.
Table 1. LED descriptions
LED Description
Power
• Green. Power is supplied to the cable modem.
• Off. No power is supplied to the cable modem.
Downstream
• Solid amber. One downstream channel is locked.
• Solid green. T
wo or more downstream channels are locked.
• Blinking green. The
cable modem is scanning for a downstream channel.
• Off. No downstream channel is locked.
Upstream
• Solid amber. One upstream channel is locked.
• Solid green. T
wo or more upstream channels are locked.
• Blinking amber.
The cable modem is scanning for an upstream channel.
• Off. No upstream channel is locked.
Internet
• Solid green. The cable modem is online.
• Blinking green.
The cable modem is synchronizing with the cable provider’s cable
modem termination system (CMTS).
• Off. The
cable modem is offline.
Ethernet
• Green. A powered-on device is connected to the Ethernet port at 1000 Mbps.
• Amber.
A powered-on device is connected to the Ethernet port at 10/100 Mbps.
• Blinking green or amber
. The Ethernet port is processing traffic.
• Off. No device is connected to the Ethernet port.
Back Panel
The back panel provides the connections and button shown the following figure.
Power adapter input
LAN Gigabit Ethernet port
Coaxial cable connector
Reset button
Figure 3. Cable modem back panel
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