Whether TN52SCC can be used as the system control board in a slave subrack when the master subrack of the OSN 6800 uses TN11SCC as the system control board

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If the software version of TN11SCC is later than 5.35 in the master subrack of the OSN 6800, TN52SCC can be configured in a slave subrack. To ensure automatic software synchronization, ensure that the TN11SCC software package includes the TN52SCC software package.

Other related questions:
Whether a system control board is required in an OSN 8800 platform subrack when it is used as a slave subrack
When an OSN 8800 platform subrack functions as a slave subrack, it does not require a system control board. Its IU17 and IU18 slots can be used to house service boards. When it functions as a master subrack, a system control board is required.

Precautions for replacing the system control board in a slave subrack of the OSN 6800
Before replacing a system control board, ensure that the spare board whose board type is the same as the system control board to be replaced. In addition, ensure that battery jumper on the spare board has been correctly set.

Whether TN52SCC boards can be installed in a slave OSN 6800 subrack
Yes, they can.

Functions and replacement precautions for the system control board in an OSN 6800 slave subrack
The SCC board in a slave subrack provides the following functions: 1. Communicates with the boards without software to control the working status of the boards. 2. Receives overhead signals from service boards by using RS485A or RS485B buses and processes the overhead signals. 3. Processes the overhead signals that are transmitted from the master subrack and delivers them to the service boards. 4. Detects whether each board in a subrack is online and uses the AUX board to report the status information to the system control board in the master subrack. 5. Provides two RS485 buses for urgent data transmission. 6. Provides required power supplies for the local board and provides 3.3 V centralized power supply backup for the entire OSN 6800 system. In addition, provides power supply backup for the boards whose maximum power consumption is less than 60 W. However, it provides power supply backup only for one board at a time.

Maximum number of slave subracks that can be connected to the master subrack of OSN 6800 during TN11SCC board expansion
At most eight optical subracks or four electrical subracks can be connected. One OSN 8800 T32 subrack is equivalent to two OSN 6800 subracks.

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