Functions of interfaces ALMO1, ALMO2, ALMO3, and ALMO4

Output and cascading interfaces (ALMO1 and ALMO2) generally transmit housekeeping alarm outputs to a PDF to display alarm information in a centralized manner. The interfaces can also be configured for other outputs.
The definitions for the pins of the ALM01 and ALM02 interfaces are the same, and the two interfaces are used for output/cascading, respectively. The definitions for the pins of the ALM03 and ALM04 interfaces are the same, and the two interfaces are used for output/cascading, respectively. For example, when the ALMO1 interface is used to output alarm signals, the ALMO2 interface can be used as an alarm cascading interface to connect to the ALMO1 interface in another subrack.
The OptiX OSN 8800 provides eight alarm outputs. The first three channels are defined as critical alarm, major alarm, and minor alarm by default, and the remaining five channels are reserved for future use. Alarm outputs can be cascaded.

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