Black Box LMC5227A-R2 Reset Alarm Button, Last Gasp Alarm, Temperature Gauge, SNMP Write Lock

Reset Alarm Button

When one power supply module malfunctions, an audible alarm sounds indicating the loss of the power module. The alarm can be silenced by pressing the Alarm Reset Button, located next to the power connector on the power supply module. If this occurs, remove and replace the power supply module immediately. (LEDs on the Management Module and the power supply module itself also indicate power supply module failures.)

Last Gasp Alarm

The 20-Slot Rackmount Chassis includes the Last Gasp trap feature, “Remote Chassis Down”, which sends a Trap when the following occurs:

•Both power supply modules malfunction

•Both power supply modules are powered down

•When the AC line fails

Temperature Gauge

The 20-Slot Rackmount Chassis includes a temperature monitoring gauge with a heat sensor on the backplane of the chassis. Users define a threshold for chassis temperature via SNMP. If the chassis’ temperature rises above the specified level, the SNMP agent sends a trap (configured in iView²) to the administrator. There is also an LED indicator on the SNMP Management Module for chassis temperature.

SNMP Write Lock

There is an SNMP Write Lock switch located below slot #3 on the front of the 20-Slot Rackmount Chassis. The SNMP Write Lock switch prevents a new management board from

re-configuring the application module settings (e.g., the	status of
features such as LinkLoss, FiberAlert, Force mode, etc.)	made via
SNMP on any previous Management Modules.

NOTE

Leave this switch in the NORMAL position during day-to-day operation; the LOCKED

position should only be used when changing the SNMP management board.

The SNMP Management Module can be removed and replaced as necessary. Refer to the SNMP Management Module manual for complete instructions about configuration and operation. If an SNMP Management Module is installed, refer to the LED panel below for indicators of Link, Temperature, Power supply modules and other functions.

SNMP Management Module LEDs

The SNMP Management Module features several LEDs. The LED functions are:

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