Electrical feature specifications of the ALMO1 and ALMO2 interfaces

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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. Alarm signals are output based on the open/closed status of the relay on the related board. When the relay is open, the resistance measured at the ALMO interface is less than 1 ohm. When the relay is closed, the resistance is infinite.

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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.

10GE electrical interface module
10GE electrical interface modules are described as follows: A 10GE electrical interface module has four 10 Gbit/s electrical ports. These ports are the service ports used to connect a storage system to application servers and to receive read/write requests from application servers.

GE electrical interface module
GE electrical interface modules are described as follows: A GE electrical interface module has four 1 Gbit/s electrical ports. These ports are the service ports used to connect the storage system to application servers and to receive data read/write requests from application servers.

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