Whether ST2 and STG must be installed in the same subrack

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If the clock functions of the ST2 board need to be used, you must insert the board into the subrack equipped with clock boards.

Other related questions:
Whether ST2 and STG need to be installed in the same subrack when the IEEE 1588v2 function is used
Yes. ST2 and STG exchange clock signals through the backplane. Therefore, when ST2 is used to support the clock function, it must be installed in the subrack housing the clock board.

Whether an ST2 board intended for an OSN 8800 subrack can be installed in an OSN 6800 subrack
An ST2 board intended for OSN 8800 can be used in an OSN 6800 subrack. To use the clock function of an ST2 board, the ST2 board must be inserted to the subrack equipped with clock boards.

Whether the ST2 boards intended for OSN 8800 devices can be installed in OSN 6800 subracks
The ST2 boards intended for OSN 8800 devices can be installed in OSN 6800 subracks. To use the clock function of the ST2 boards, the ST2 boards must be installed in subracks that are equipped with clock boards.

Whether an ST2 board can be configured in a slave subrack
You are advised to configure an ST2 board in the master subrack. The ST2 board can be configured in a slave subrack if no orderwire function is used. If the clock functions of the ST2 board need to be used, the board needs to be configured in a subrack equipped with clock boards.

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