NEC NEC Express5800 Series, Online Service Manual

Page: 168 / 198

Emergency Management Port Console C-3
How the EMP Works
The EMP shares use of the COM 2 port with your system. When the EMP has control of the port,
the port operates in command state. When the system has control of it, the port operates in redirect
state. When connecting to a server, the EMP checks to determine the current COM 2 port state. The
following discussion covers how the EMP functions in each state:
n
Command state
is the default COM 2 state. In this state, the EMP communicates with the
server, allowing the client to remotely reset or power the server up or down. The client can also
view the server's System Event Log (SEL), Field Replaceable Unit (FRU) information, or Sensor
Data Record (SDR) table.
n
In
redirect state
, the EMP serves as a PC ANSI terminal window for BIOS console redirection.
Commands typed in this terminal window are transmitted through BIOS to the server's
console, and text displayed on the server console are displayed on the EMP's terminal window.
With the EMP in this state, you can remotely view boot messages, access BIOS setup, and run
DOS text mode applications through the EMP's terminal window.
EMP in Command State