Compaq W4000 - Manual (Page 124)

Technical Reference Guide
5.9.7 NIC UPGRADING/CHANGING
The integrated NIC may be used in conjunction with another NIC card in a PCI slot. These
systems provide AOL support for NIC cards that are AOL-compliant to the extent described
previously in section 5.9.2. These systems also provide Remote System Alert (RSA) support for
such NIC cards as the 3Com 3C905C-TX NIC card. The RSA function is similar to AOL in that
the unit provides, even while powered off, system status alert messages to a network console.
Note that NIC cards implementing the RSA method do not use the PCI/SMBus for receiving alert
information and therefore require, in addition to the PCI connection, an auxiliary cable connection
with the system as shown in Figure 5-16.
AOL/SOS
Header P12
NIC Card in PCI Slot
AOL/SOS Cable
Network
Cable
System or
Backplane
board
Figure 5-15. Remote System Alert Implementation (Generic Representation)
In the Remote System Alert implementation, the NIC card receives event notification directly
from the system’s thermal and hood sensors and the LPC47B357 I/O controller over an AOL/SOS
cable connection (Figure 5-17). During system-off conditions the NIC card receives auxiliary
power from the 3.3 VDC auxiliary power rail on the PCI bus.
PCI
Bus
System or Backplane Board
Hood Sensor
Optional NIC Card
PCI
Connector
PCI
Bus
Thermal
ASIC
7
BIOS Fail
O
NC S Fail
Intrusion
Fan
Fan Alert
Fan Therm.
AOL/SOS
Header
1
SOS
NC
NC
47B37x
I/O Cntlr.
Not connected on Configurable Minitower models.
Figure 5-16. RSA Logic, Block Diagram
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition - January 2003
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