NEC MH4500 manual How the EMP Works

The Emergency Management Port (EMP) allows remote server management via a modem or direct connection. The COM2 port on your server provides an interface to Console Manager software located in a second system.

Managed Server
Sensors	Event		BIOS
	Generators
			Direct Connection
	Board Management
	Controller (BMC)
				OR
	System	Sensor	Modem	Modem
Event Log		Data	Modem Connection
	(SEL)	Record
		(SDR)

Management Console

Console

Manager

SEL,

SDR,

FRU

Viewers

Control

Operations

Phonebook

Emergency Management Port Configuration

The following server operations are available from the Console Manager:

connecting to remote servers

powering the server ON or OFF

resetting the server

SEL viewer

TSDR viewer FRU viewer.

The Console Manager has a Phonebook, which you use to connect to a selected server.

Referring to the above figure, the Board Management Controller (BMC) in your server monitors system management events and logs their occurrence in the System Event Log (SEL). These include events such as over-temperature and over-voltage conditions, fan failure, or chassis intrusion. To enable accurate monitoring of temperature, voltage, etc. independent of an event, the BMC also maintains Sensor Data Record (SDR) for each sensor, from which sensor information can be retrieved.

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.

C-2 Emergency Management Port