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18 Digital Desktop System Installer/User Guide
Figure 3.2: LED Identification - PCI Add In Card
LED Definitions
Power
The Power LED is off when no power is supplied to the PCI Add In Card or Desktop Appliance.
When auxiliary power is applied, this LED is dimly illuminated. When the main power is on, this
LED is fully illuminated.
Physical Link
The Physical Link LED is illuminated when a physical link is established between the Desktop
Appliance and the PCI Add In Card. It is fully illuminated when a 1 Gigabit (Gb) link has been
established with another Digital Desktop System component or a buffer device such as a 1 Gb
Ethernet switch. The Physical Link LED blinks rapidly if the unit is connected to a device that
provides a 100 Megabit (Mb) link and slowly when connected to a device providing a 10 Mb link.
Therefore, if the Physical Link LED is blinking, the system will not function correctly since a 1 Gb
link has not been established.
NOTE: For DDL21xx fiber models, the
Physical Link
LED is fully illuminated when the presence of LASER light
indicates that a fiber optic connection is detected.
System Link
The System Link LED is off when no power is available to the PCI Add In Card or Desktop
Appliance. It blinks rapidly when power is available without a system link connection. It blinks
slowly to indicate that a system link is established but the unit(s) on either end of the connection is
Power
System Link
FLASH Access
Physical Link