NEC FA Series Installation And Maintenance Manual page 111

In the Redundancy Settings screen, set the Port number of the Backup side LED controller (Sending Card) that
matches the Port number of the Primary side LED controller (Sending Card).
After entering the value, click the "Add" button.
In the LED configuration example (English-99), the settings are as follows.
Serial Number of Primary Sending Card : 1
Serial Number of Primary Port : 1
Serial Number of Backup Sending Card : 2
Serial Number of Backup Port : 1
Serial Number of Primary Sending Card : 1
Serial Number of Primary Port : 2
Serial Number of Backup Sending Card : 2
Serial Number of Backup Port : 2
Serial Number of Primary Sending Card : 1
Serial Number of Primary Port : 3
Serial Number of Backup Sending Card : 2
Serial Number of Backup Port : 3
When the settings configuration is complete, the Sending Card tab appears like below.
Click the "Send" button.
Click the "Save" button.
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