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LEDs
Table 1-2 summarizes the function of each LED. All LEDs are on the router front panel
except for the LINK LED, which is on the router back panel.
Table 1-2
LED Functions
Corresponding
LED
Port/Component
OK
Power
LAN
Ethernet
RXD
Ethernet
(Received)
TXD
Ethernet
(Transmitted)
CD
Serial
(Carrier detect)
RXD
Serial
(Received)
TXD
Serial
(Transmitted)
LINK
Ethernet
Color
Function
Green
On when power is supplied to the router and when the router
completes the self-test procedure and begins operating.
Green
On when the Ethernet interface is up.
Off when the Ethernet interface has been shut down.
Green
Blinks when the Ethernet port receives a packet.
Green
Blinks when the Ethernet port sends a packet.
Orange
On when the serial interface is up and a carrier signal is detected.
Off when a carrier signal is not detected.
Orange
Blinks when the serial port receives a packet.
Orange
Blinks when the serial port sends a packet.
Green
On when Ethernet device is connected.
Off when the connection has a problem. Refer to the Chapter 3,
"Troubleshooting."
LEDs
Product Overview 1-5
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