Whether the software version of the standby SCC board must be the same as that of the active SCC board during the replacement of the standby SCC board

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There is no version requirement for the standby SCC board during the replacement of the standby SCC board. This is because that the software needs to be erased using DIP switches before a spare SCC board is used to replace the standby SCC board. After the spare SCC board is inserted to a subrack, the board software of the standby SCC board will be automatically synchronized with the active SCC board.

Other related questions:
Whether the hardware version of the standby SCC board must be the same as that of the active SCC board during the replacement of the standby SCC board
During the replacement of the standby SCC board, the hardware versions of the active and standby SCC boards can be different, but the spare and to-be-replaced SCC boards must be substitutable. In addition, the SCC boards in the subrack housing the to-be-replaced SCC board must be the same type. That is, the active and standby SCC boards must be the same after the replacement.

Slots where the active and standby SCC boards reside
The slots occupied by the active and standby SCC boards are not fixed. Generally, when the system starts, the SCC board with a smaller slot ID serves as the active SCC board, and the other SCC board serves as the standby SCC board. You can query the active/standby status of an SCC board by using either of the following methods: 1. View the ACT indicator of the SCC board. If the indicator is on, the SCC board is in the active state. If the indicator is off, the SCC board is in the standby state. 2. In the NE Explorer of the U2000, choose Configuration > Board 1+1 Protection from the Function Tree. Click Query. The working board, protection board, and current board can be queried. The current boards refer to the active SCC boards.

Whether services are interrupted during SCC board replacement
Replacement of the SCC board has no impact on traditional services. However, ASON services may be interrupted for a short time when configurations are restored by downloading the NE database.

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 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.

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