Compaq W4000 Manual De Usuario

Technical Reference Guide 

 

 
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 

 

 

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