Verify settings on CM9760-Hotswitch by LEDs and CM9760-CCC buttons.
Showing status of which CM97XX-CC1 is online and if backup CM9700-CC1 is in sync or asyncronus mode.
Verify status of CM9760-Hotswitch.
CM97XX-CC1- A has failed and backup CM97XX-CC1-B has come on line. Here a loud tone coming from CM9760-Hotswitch.