H
ARDWARE
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ESCRIPTION
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Remote LAN Wakeup
Remote LAN Wakeup capability is a key feature of a centrally managed PC
environment. This technology enables networked PCs to be “woken up”
from a sleep or powered-off state so they can be managed from a central
location, at any time of the day or night.
To employ Remote LAN Wakeup, three elements are required:
• Desktop management software that can send a “wake-up” packet to a
PC.
• A Wake-On-LAN enabled PC motherboard that can supply low-level
auxiliary power to a network card when the PC is powered off.
• A Wake-On-LAN network card that can recognize a wake-up packet
and signal the PC to power up.
A Wake-On-LAN enabled PC is never completely powered off, it
maintains a low-level auxiliary power supply to the motherboard. The
3-wire Wake-On-LAN cable provides one line for the network card
auxiliary power and one line for the card wake-up signal, the other line is
ground.
Even if the PC is powered off, the network card is always active and
monitoring the network. When a wake-up packet is detected, the card
signals the motherboard to power up the PC. With the PC powered on,
maintenance and other support tasks can be performed.
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