Hello gabo
The VP9660 has two main control boards: active and standby main control boards.
The VP9660 has a standby main control board. When the active main control board is faulty, services on the board will be switched to the standby main control board. Endpoint users will not be aware of the switchover.
HCCB Board
The HEVC Central Control Board B (HCCB) board is the main control board of the VP9660. As the core processing unit of the VP9660, the HCCB board is mandatory.