Acpi; Table 3. 10/100/1000 Megabit Leds - Intel SE7501HG2 Product Manual

NIC Connector and Status LEDs
The 82546EB controller provides two RJ45 ports, each of which provides two LEDs, one to the left
of each connector and the other to the right of the each connector when looking at the I/O area from
the back of the board. The LEDs to the left of each connector indicate the connection speed and the
right connectors indicate transmit / receive activity link/activity on the LAN and the speed of
operation. See the following table for an overview.
Table 3. 10/100/1000 Megabit LEDs
LED Location
Left of each RJ45 port
Right of each RJ45 port

ACPI

The SE7501HG2 supports the Advanced Configuration and Power Interface (ACPI) as defined by
the ACPI 1.0b. An ACPI-aware operating system can put the system into a sleep state in which 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 dissipate some power, so the power supply fan and processor
fans continue to run.
NOTE
ACPI requires an operating system that supports this feature.
The server board supports sleep states S0, S1, S4, and S5. When the server board is operating in
ACPI mode, the operating system retains control of the system and the OS policy determines the
entry methods and wake-up sources for each sleep state – sleep entry and wake-up event
capabilities are provided by the hardware but are enabled by the operating system.
S0: Normal running state.
S1: DC Power remains on. The operating system saves the context and enters a low-power
state. The system can wake from the S1 state using a PS/2 keyboard, mouse, or USB device,
by pressing the power button press, or from a wakeup event.
S4: Hibernate or Save to Disk. The memory and machine state are saved to disk. Pressing the
power button or another wakeup event restores the system state from the disk and resumes
normal operation. This assumes that no hardware changes were made to the system while it
was off.
S5: Soft off. Only the RTC section of the chip set is running in this state.
CAUTION
The system is off only when the AC power is disconnected.
20
LED State
Off
Green
Yellow
On
Blinking
NIC State
10-Mbps
100-Mbps
1000-Mbps
On
Transmit / Receive activity
Intel Server Board SE7501HG2 Product Guide