- System management and control unit.
- 10G path with 24 data interface, and data communication services through the backplane board.
- With 16 FE management interface, through the backplane to manage the business board.
- Main and standby through the FE port to support the active and standby switch function.
- Maintain serial port and out-of-band network ports, support local and remote maintenance.
- Contains all mirroring files for boards.
- support SD card.
