On Networks N150R Installation Guide - Manual (Page 3)

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Router Description
Front Panel. The front panel has five status LEDs.
Power/Test LED. If solid green, the router is
ready. If blinking green, the router is
performing the power-on diagnostic test. If off,
the router is not connected to a power source.
Wireless LED. If solid green, the wireless
connection is established. If blinking green,
data is being transmitted. If off, the wireless
interface is turned off.
Internet LED. If solid green, the router is
linked to the Internet. If blinking green, data is
being transmitted. If off, no Ethernet cable is
connected from the Internet port to the
modem.
Two Ethernet LEDs. If one of these LEDs is
off, make sure the Ethernet cable is securely
attached at both ends, and that the computer
is turned on. If solid green, the local port is
connected to an Ethernet device. If blinking
green, data is being transmitted. If off, no
Ethernet device is connected to the port.