Principles for configuring the ST2 board in the OptiX OSN 8800 T64 subrack

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The ST2 board is optional for an OptiX OSN 8800 T64 subrack and is configured based on service requirements. It receives, processes, and transmits two OSC signals in the east and west directions. In addition, it can process IEEE 1588v2 synchronous clock signals and transparently transmit two FE signals.
The ST2 board is not recommended for the networks where the ROP board, Raman board, HBA board, or optical-layer ASON is used. In such a network, the SC1 or SC2 board is recommended.

Other related questions:
Packet board configuration for slave OptiX OSN 8800 subracks
At present, packet boards can be used only in an independent subrack, but not in the master or slave subrack when subracks are configured in the master-slave mode. When packet boards are configured in an OptiX OSN 8800 T32 subrack, the cross-connect board must be TN52UXCH or TN52UXCM, and the system control board must be TN52SCC in the subrack. When packet boards are configured in an OptiX OSN 8800 T16 subrack, the cross-connect board must be TN16UXCM in the subrack.

Whether 1:1 protection can be configured for the SXM and XCT boards configured in an OptiX OSN 8800 T64 subrack
In an OSN 8800 T64 subrack, intra-subrack ODUk service grooming is shared by one SXM board and one XCT board. An OSN 8800 T64 subrack adopts dual-side configurations. It has two SXM boards and two XCT boards. The SXM and XCT boards on the front and back sides work in 1:1 protection mode.

Principles for configuring the OBU1P1 boards in the PID system for OptiX OSN 8800
When TN55NPO2 boards comprise a 120G PID group, OBU1P1 boards need to be configured based on the line loss if the transmission distance is less than 40 km. If the line loss is less than or equal to 11 dB, no OBU1P1 board needs to be configured. OBU1P1 boards need to be configured at the receive site when the line loss is greater than 11 dB but less than or equal to 20 dB. When the transmission distance is greater than 40 km but less than 80 km, OBU1P1 boards need to be configured at the receive site when the line loss is greater than 9 dB but less than or equal to 20 dB. When TN55NPO2E boards comprise a 200G PID group, OBU1P1 boards need to be configured based on the line loss if the transmission distance is less than 40 km. If the line loss is less than or equal to 9 dB, no OBU1P1 board needs to be configured. OBU1P1 boards need to be configured at the receive site when the line loss is greater than 9 dB. When the transmission distance is greater than 40 km but less than 80 km, OBU1P1 boards need to be configured at the receive site when the line loss is greater than 9 dB but less than or equal to 20 dB.

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 an OptiX OSN 8800 subrack can function as a slave subrack of an OptiX OSN 6800 subrack
Yes, it can function as a slave subrack of an OptiX OSN 6800 subrack.

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