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Table 6. 10/100/1000 Gigabit Ethernet LAN Connector LEDs
LED Color
Green
(left LED)
Bi-color LED
(right LED)
Power Management
Power management is implemented at several levels, including:
•
Software support through Advanced Configuration and Power Interface (ACPI)
•
Hardware support:
–
Suspend to RAM (Instantly Available PC technology)
–
Power connectors
–
Fan connectors
–
Resume on Ring
–
Wake from USB
–
Wake from PS/2 keyboard/mouse
–
PME# wakeup support
Software Support through ACPI
The Advance Configuration and Power Interface (ACPI) – aware operating system can place the
system into a state where the hard drives spin down, the system fans stop, and all processing is
halted. In this state, the power supply is still on and the processors still dissipate some power, so
the power supply fan and processor fans are still running.
Under ACPI, the operating system directs all system and device power state transitions. The operating
system puts devices in and out of low-power states Based on user preferences and knowledge of
how devices are being used by applications. Devices that are not being used can be turned off. The
operating system uses information from applications and user settings to put the system as a whole
into a low-power state.
ACPI features include:
•
Plug and Play (including bus and device enumeration).
•
Power management control of individual devices, add-in boards (some add-in boards may
require an ACPI-aware driver), video displays, and hard disk drives.
•
Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state.
•
A soft-off feature that enables the operating system to power-off the computer.
•
Support for multiple wake-up events.
•
Support for a front panel power and sleep mode switch.
18
LED State
Indicates
Off
LAN link is not established.
On (steady state)
LAN link is established.
On
The computer is communicating with another computer
(brighter and pulsing)
on the LAN.
Off
10 MBit/sec data rate is selected.
Green
100 MBit/sec data rate is selected.
1000 MBit/sec data rate is selected.
Yellow
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