Network Support; Pci Ver. 2.2 Support; Alert-On-Lan Support; Aol Events - HP Deskpro EX Technical Reference Manual

Chapter 5 Input/Output Interfaces
5.9

NETWORK SUPPORT

These systems include specific features to support optional network interface PCI cards that may
be installed. These features, including network-alert functions with system-off support, are
described in the following subsections.

5.9.1 PCI VER. 2.2 SUPPORT

These systems support the Power Management Event (PME-) signal and provided 3.3 VDC
auxiliary power for all PCI slots. Network interface cards compliant with PCI specification ver. 2.2
may be installed to provided "system off" network support without additional cable connections. In
a powered-down state the compliant network card receives 3.3 volts of auxiliary DC power on pin
A14 of the PCI connector and uses PCI pin A19 for the PME- signal that is routed to general
purpose input #13 of the LPC47B357 I/O controller. Network activity causing the NIC card to
assert the PME- signal can be used to restart or "wake" the system from a suspend state.
NOTE: For auxiliary power to be available in a system-off condition the system unit
must be plugged into a live AC outlet. Controlling unit power through a switchable power
strip will, with the strip turned off, disable PME- functionality.

5.9.2 ALERT-ON-LAN SUPPORT

Alert-On-LAN (AOL) support allows a network interface controller (NIC) card to communicate
the occurrence of certain events over a network even while the system unit is powered off. In a
system-off (powered down) condition a NIC card receives auxiliary +3.3 VDC power (derived
from the +5 VDC auxiliary power from the power supply assembly). Certain events will result in a
compliant NIC card to transmit an appropriate pre-constructed message over the network to a
system management console.
Reportable AOL events are listed in the following table:
Table 5–24. AOL Events
Event
BIOS Failure
OS Problem
Missing/Faulty Processor
Heartbeat
5-30 Compaq Deskpro EX Series of Personal Computers

Table 5-24.

AOL Events

Description
System fails to boot successfully.
System fails to load operating system after POST.
Processor fails to fetch first instruction.
Indication of system's network presence (sent approximately every 30
seconds in normal operation).
First Edition – August 2000