Precautions for replacing the SCC board in the master subrack of OSN 8800

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The prerequisites to replace the space SCC are: Data synchronization between the active and standby SCCs are normal; The hardware type and software version of the spare and working SCCs are the same.

Other related questions:
Precautions for standby SCC board replacement in the master OptiX OSN 6800 subrack
Data between the active and standby SCC boards must be synchronized, and the active and standby SCC boards must use the same hardware model.

Insertion of TDM boards into OSN 8800 master/slave subracks
Not all boards can be inserted to master/slave subracks. Project A in country I is used as an example. In the engineering design phase of this project, there are too many SLH14 fibers. To facilitate fiber maintenance, two SLH41 boards cannot be inserted into adjacent slots and SLH41 boards cannot be inserted in slots at the edge of a subrack. For services with heavy traffic, SLH41 boards can be installed in two subracks in master/slave mode. According to the feedback from field engineers, no SLH41 board can be queried on the NMS. There are restrictions on subracks for housing boards that support packet/SDH services.

Specifications for slave subrack expansion on the master subrack of OSN 8800 T32
The TN52SCC board supports a total of 20 optical and electrical subracks, containing four or less electrical subracks. The TN51SCC board supports a total of eight optical and electrical subracks, containing four or less electrical subracks. The subracks run in master/slave mode. The number of subracks here indicates the number of equivalent subracks. One OSN 6800 subrack equals to one equivalent subrack, and one OSN 8800 T32 subrack equals to two equivalent subracks.

Method used to determine whether the new SCC board is initialized when one SCC board in an OSN 6800 subrack equipped with two SCC boards is replaced
The new SCC board will complete the initialization 15 minutes later after being inserted into the slot housing the original SCC board.

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.

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