Intel Desktop Board D975XBX Technical Product Specification
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Resume on Ring enables telephony devices to access the computer when it is in a power-managed
state. The method used depends on the type of telephony device (external or internal).
NOTE
The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an
operating system that provides full ACPI support.
1.13.2.1 Power Connector
When an ACPI-enabled system receives the appropriate command, the power supply removes all
non-standby voltages.
When resuming from an AC power failure, the computer returns to the power state it was in before
power was interrupted (on or off). The computer’s response can be set using the Last Power State
feature in the BIOS Setup program’s Boot menu.
For information about Refer to
The location of the main power connector Figure 19, page 58
The signal names of the main power connector Table 25, page 62
1.13.2.2 Fan Connectors
The function/operation of the fan connectors is as follows:
• The fans are on when the board is in the S0 or S1 state.
• The fans are off when the board is off or in the S3, S4, or S5 state.
• Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan
control ASIC
• All fan connectors support closed-loop fan control that can adjust the fan speed or switch the
fan on or off as needed.
• All fan connectors have a +12 V DC connection
For information about Refer to
The location of the fan connectors Figure 19, page 58
The location of the fan connectors and sensors for thermal monitoring Figure 14, page 39
The signal names of the fan connectors Section 2.7.1.1, page 56
1.13.2.3 LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing LAN wake capabilities can damage the power supply.
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN
network adapter monitors network traffic at the Media Independent Interface. Upon detecting a
Magic Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer.
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