4-2
Cisco AS5400 Universal Gateway Chassis Installation Guide
OL-2847-02 0A
Chapter 4 Troubleshooting
LEDs
Figure 4-1
Universal Gateway Rear Panel LEDs
Table 4-1
Chassis LEDs
LED
State
Description
Alarm
On
An alarm error is detected.
Off
Remains off when operation is normal.
Fast Ethernet Activity (ACT) Flickering
The Fast Ethernet LAN connection is
transmitting and receiving data
normally.
Fast Ethernet Link (LNK)
On
Fast Ethernet cable is connected
properly.
Off
The Ethernet LAN connection is not
transmitting or receiving data. Check
the Ethernet cable connections.
OK/MAINT
On
System board is operating normally.
Off
Power is off or system has not booted.
Blinking
A memory failure occurred.
Serial Ports Activity (ACT)
Flickering
The serial port connection is
transmitting and receiving data
normally.
Serial Ports Link (LNK)
On
The serial port cable is connected
properly.
Off
The serial port cable is not connected
properly.
BITS Port
On
Indicates a valid signal on the BITS
port.
Off
Remains off when operating condition
is normal.
T0
T1
ACTIVITY (ACT)
LNK
BITS
BOARD OK
LED
ACTIVITY (ACT)
LNK
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