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TN12STG01 Is Huawei OptiX OSN 9800 Centralized Clock Boards
Huawei OptiX OSN 9800 Centralized Clock Boards TN12STG01 03030SVB Overview
STG: Centralized Clock Board
The available functional versions of the STG board are TN12 and TN13.
The STG board is a type of clock board, which locks the reference clock source and provides clock signals and frame signals to the system. The clock signals comply with ITU-T G.813 and ITU-T G.823.
The STG board is mainly used to lock the reference clock source and provide signals and frame signals to the system.
The STG board consists of a control and communication module and a clock processing module.
There are indicators on the front panel of the STG board.
One slot houses one STG board.
Function and Feature
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Function and Feature |
Description |
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Basic function |
NOTE: The online fiber detection and clock synchronization functions (including physical clock, IEEE 1588v2, and ITU-T G.8275.1) can be enabled only when the AST2 board works with the TN13STG clock board. If the AST2 board works with other clock boards, the online fiber detection function will cause the clock synchronization signal to fail. |
|
Active/standby switching function |
The STG board uses a 1+1 hot backup scheme. The two STGs serve as mutual backups. When both of them are normal, one of them functions as the active board, and the other functions as the standby board. Service boards select the clock source according to the status of the two STGs. When the active STG is faulty, an active/standby switching occurs. Then, the standby STG becomes active, and the services boards select the clock from the current active STG according to the status of the two STGs. |
|
Clock source selection function |
Traces the external clock source, service clock source, or local clock source, to provide the synchronization clock source for itself and the system. |
|
Time synchronization function |
Synchronizes the time of an NE with the time of the upstream NE. |
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