Alarm Port
The alarm port on the rear panel uses a standard DB-15 connector. In a telecommunications environment, use this port to connect to the central office alarming system. The alarm port relay contacts are rated for 100 V 0.2 A maximum.
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Each alarm has a corresponding alarm LED on the front panel:
ALARM0 and the Critical LED
ALARM1 and the Major LED
ALARM2 and the Minor LED
ALARM3 and the User LED