Wake on LAN Technology

Wake on LAN technology makes available remote wakeup of the computer through a network. The LAN subsystem, whether onboard or as a PCI bus network adapter, monitors network traffic at the Media Independent Interface. Upon detecting a Magic Packet, the LAN subsystem asserts a wakeup signal that powers up the computer. The motherboard supports Wake on LAN technology when using APM. Wake on LAN is simulated in ACPI through the Wake on PME technology using the PCI bus PME# signal.

The use of APM versus ACPI is dependent on the operating systems and the BIOS on the motherboard. To tell whether APM or ACPI is being utilized, look in the Device Manager\ System Devices. APM and ACPI are not an option of Windows NT 4.0.

Caution: For Wake on LAN technology, the 5-V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options.


















Instantly available technology

Instantly available technology allows the motherboard to enter the ACPI S3 (Suspend-to-RAM) sleep state. While in the S3 sleep state, the computer power appears to be off. When signaled by a wake up device or event, the computer quickly returns to its last known wake state. The table below lists the devices and events that can wake the computer from the S3 state. The motherboard supports the PCI Bus Power Management Specification and the 3.3V Aux ECR. Add-in motherboards that also support these specifications can participate in power management and can be used to wake the computer.

Caution: For Instantly Available technology, the 5-V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options.


















Wake Up EventFrom State
Power buttonS3, S5
RTC alarmS3
LANS3
PCI PMES3
USBS3
PS/2 (keyboard, mouse)S3