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Chapter 4: Operation
Page 24 724-746-5500 | blackbox.com LMC5208A
4. Operation
4.1 The 20-Slot Rackmount Chassis
4.1.1 Alarm Reset, Last Gasp, and Temperature Gauge
The 20-Slot Rackmount Chassis series supports power supply modules, so that
worn parts can be replaced without having to send an entire unit in for repair.
User-Replaceable
Power Supply Modules
Reset Alarm Button
When one power supply module malfunctions, an audible alarm sounds
indicating the loss of the power module. To silence the alarm, press 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.
4.1.2 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
Part Numbers
LMC5208A 877-877-2269 | blackbox.com Page 9
Back Up, Spares, Sold Separately
Part Number
Description
LMC5200A SNMP Management Module includes Black Box and View²
LMC5238A 19 inch Rackmount shelf and screws