External Device Connectors - NEC Express5800 series User Manual

One major function of the BMC is to autonomously monitor system management
events, and log their occurrence in the nonvolatile System Event Log (SEL). The events
being monitored include overtemperature and overvoltage conditions, fan failure, or
chassis intrusion. To enable accurate monitoring, the BMC maintains the nonvolatile
Sensor Data Record (SDR), from which sensor information can be retrieved. The BMC
provides an ISA host interface to SDR sensor information, so that software running on
the server can poll and retrieve the server's current status.
The BMC performs the following:
!
Monitors server board temperature and voltage
!
Monitors processor presence and controls Fault Resilient Boot (FRB)
!
Detects and indicates baseboard fan failure
!
Manages the SEL interface
!
Manages the SDR Repository interface
!
Monitors the SDR/SEL timestamp clock
!
Monitors the system management watchdog timer
!
Monitors the periodic SMI timer
!
Monitors the event receiver
!
Controls secure mode, including video blanking, diskette write-protect monitoring,
and front panel lock/unlock initiation
!
Controls Wake On LAN via Magic Packet support.

External Device Connectors

The external I/O connectors provide support for a PS/2 compatible mouse and a
keyboard, a SVGA monitor, 2 serial port connectors, a parallel port connector, two
LAN ports, two USB ports, and one external-SCSI connector.
1-18 System Overview