Hi friend.
This alarm indicates that the electronic switch chip of the X2CS board is faulty. The electronic switch chip interconnects with the active board.
For example, when slot 9 is in the active state, the electronic switch switches the service channel to the orange service channel according to the active/standby indication signal. Similarly, when the board in slot 10 is active, the electronic switch switches to the blue service channel.
The electronic switches of the two boards share the same active/standby signal. If the active/standby signal is interfered and the high/low level is faulty, the electronic switches may be switched incorrectly, causing service channel interruption.
Thanks.