Compaq 850 manual Network Support, PCI VER .2 Support, ALERT-ON-LAN Support, AOL Events

Technical Reference Guide

5.9NETWORK SUPPORT

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

5.9.1PCI 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 providE “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 compliant 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

	Table 5-24.
	AOL Events
Event	Description
BIOS Failure	System fails to boot successfully.
OS Problem	System fails to load operating system after POST.
Missing/Faulty Processor	Processor fails to fetch first instruction.
Heartbeat	Indication of system’s network presence (sent approximately every 30
	seconds in normal operation).

Compaq Deskpro EXS and Workstation 300 Personal Computers 5-33

Featuring the Intel Pentium 4 Processor

First Edition - December 2000