 |
NOTE:This
feature does not work if the system is shut off using a power strip or surge protector. |
With the advent of ACPI technology, Microsoft implemented a new wake-up method called
pattern byte matching (PBM). When PBM is enabled, there is the potential for a local area
network (LAN) user to wake up another system that is in suspend mode. The following
information explains wake-up technology and its functionality on your Dell system under
various operating systems (OS).
Remote Wake Up, also known as Wakeup On LAN, allows a network administrator to start a
system remotely using a LAN signal from a server management console. This capability
provides for remote computer access after hours and on weekends when LAN traffic is
typically at a minimum.
Wakeup On LAN originally used a technology known as Magic Packet, which sends a data
packet directly to a system. This packet consists of data that has 16 repetitions of the
system's media access control (MAC) layer address. The MAC address is unique to the
network adapter in the system so the Magic Packet wakes only the system targeted for
start-up. When the network adapter receives and decodes this packet, it sends a power
management event (PME) signal to the system that brings it back to full power and boots
the system.
PBM provides the wake-up packet for systems that support ACPI. The system downloads a
series of patterns to the network adapter, and the network adapter monitors for the
arrival of these patterns in a packet. If it finds these patterns, the network adapter
generates a PME signal to wake up the system.
PBM wake-up technology is much different from Magic Packet wake-up technology. A Magic
Packet is not a regular network data packet. Magic Packet technology starts a system when
a network administrator sends the data packet from a management station.
Wake from Address Resolution Protocol (ARP) and Wake from NetBIOS name lookup patterns
are available in the PBM method currently provided in Windows 98 Second Edition (SE). ARP
or NetBIOS lookup packets are standard features of network activity and can wake up
suspended systems without action from an administrator. For example, several systems may
share hard-disk drives in a standard work group scenario. If a system is in a suspend mode
when someone on the network searches for that system using Network Neighborhood
or clicks the system icon, it can generate an ARP or a NetBIOS name lookup packet that
wakes up the target system.
Current wake-up patterns allowed by the Network Device Class Power Management
Specification are the following:
- Wake from NetBIOS name lookup
The specification also defines Magic Packet as a wake-up method. Wake-up technology
that uses PBM is controlled by the Microsoft Windows OS because the OS programs the
patterns. Therefore, PBM only works in systems that use the Windows OS with ACPI enabled.
For more information on PBM, please refer to the Network Device Class Power Management
Specification.
To change Remote Wake Up options, enter System Setup by pressing
<F2> during the start-up boot sequence. Tables 1 and 2 define remote wake-up
functions for each Windows operating system and system power state combination.
Table 1. Network Driver Interface Specification (NDIS) 4.0 Driver
| System Setup—Remote
Wake Up On |
Windows 95 OS |
Windows NT® 4.0 OS |
| Wake from Off—Magic
Packet |
Yes |
Yes |
| Wake from Off—PBM |
No |
No |
| Wake from Suspend |
No |
No |
| NOTES: When Remote Wake
Up is set to Off, all wake-up events are disabled. Wake from NetBIOS name lookup is not available in the Windows 95
or Windows NT 4.0 operating systems. |
Table 2. NDIS 5.0 Driver with ACPI Enabled
System Setup—
Remote Wake Up Off |
Windows 98 OS |
Windows 98 SE OS |
Windows 2000 OS |
| Wake from standby (S1)—Magic Packet |
No |
Yes |
Yes |
| Wake from standby (S1)—PBM |
No |
Yes |
Yes |
| Wake from shutdown (S5)—Magic Packet |
No |
No |
No |
| Wake from shutdown (S5)—PBM |
No |
No |
No |
System Setup—
Remote Wake Up On |
Windows 98 OS |
Windows 98 SE OS |
Windows 2000 OS |
| Wake from standby (S1)—Magic Packet |
No |
Yes |
Yes |
| Wake from standby (S1)—PBM |
No |
Yes |
Yes |
| Wake from shutdown (S5)—Magic Packet |
Yes |
Yes |
Yes |
| Wake from shutdown (S5)—PBM |
No |
No |
No |
Remote System Alert
Remote System Alert allows you to receive certain
predetermined messages from the system about its operating condition. For example, the
system can transmit an alert if the computer cover is removed.
To use the Remote System Alert feature, each Managed PC system must
contain an integrated NIC that supports Remote System Alert.
|
NOTE: This
feature does not work if the system is shut off using a power strip or surge protector. |
Auto Power On enables you to turn on the computer
system automatically on certain days of the week at a preset time. You can set Auto
Power On to turn on the system either every day or every Monday through Friday.
|
NOTE:This
feature does not work if the system is shut off using a power strip or surge protector. |
Chassis intrusion alerts notify you if a local or remote system's chassis has been
opened.
CIM Support
CIM allows you to access system management information if your
system is running Microsoft® Windows 98 or any other Windows operating system that
includes the Web-Based Enterprise Management (WBEM) core components. For information about
the WBEM core components and how to install them, see the Microsoft World Wide Web site at
http:\\www.microsoft.com.
For more information about CIM support, see the Dell OpenManage
Client Instrumentation Version 5.0 User's Guide installed in the Dell
Documents folder on your hard-disk drive.
Configuration change alerts generate warning messages if a local or
remote system has a change in hardware configuration.
Asset Info uses the nonproprietary DMI standard to allow you to
record and track costs related to your system. The cost-related information is stored in
the cost of ownership Management Information Format (coo.mif) file on
your system's hard-disk drive. For more information about Asset Info and the COO MIF
standard, see the online "Dell OpenManage Client Instrumentation Version 5.0
User's Guide."
Remote flash BIOS allows a network administrator to perform remote
BIOS upgrades to systems on a network.
Remote system configuration features allow a network administrator
to change the system asset tag, boot sequence, property ownership tag, and System Setup
settings and to update the system BIOS.
Prefailure alerts generate warning messages about potential failures
by the system DIMMs and SMART II hard-disk drives.
Certain configurations of Dell computer systems comply with the
requirements set forth by the Environmental Protection Agency (EPA) for energy-efficient
computers. If the front panel of your computer bears the ENERGY STAR® Emblem (see Figure
1), your original configuration complies with these requirements and all ENERGY STAR® power management features of the computer are enabled.
|
NOTES: As an ENERGY STAR® Partner,
Dell Computer Corporation has determined that this product meets the ENERGY STAR®
guidelines for energy efficiency. Any Dell computer bearing the ENERGY STAR® Emblem is
certified to comply with EPA ENERGY STAR® requirements as
configured when shipped by Dell. Any changes you make to this configuration (such
as installing additional expansion cards or drives) may increase the system's power
consumption beyond the limits set by the EPA's ENERGY STAR® Computers program. |
Figure 1. ENERGY STAR® Emblem
The EPA's ENERGY STAR® Computers program is a joint effort between the EPA and
computer manufacturers to reduce air pollution by promoting energy-efficient computer
products. The EPA estimates that use of ENERGY STAR® computer products can save computer
users up to two billion dollars annually in electricity costs. In turn, this reduction in
electricity usage can reduce emissions of carbon dioxide, the gas primarily responsible
for the greenhouse effect, and sulfur dioxide and nitrogen oxides, which are the two
primary causes of acid rain.
Computer users can also help to reduce electricity usage and its
side effects by turning off their computer systems when they are not in use for extended
periods of time—particularly at night and on weekends.
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