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In this section, we need to know the typical logical function blocks in SDH.
Part 4: Logical Function Modules
1. Typical function module of a TM device.
2. The MST is the source and sink of the MS. It provides E2 order wire channels.
3. The A1H and A2 bytes in the regenerator overhead are associated with R-OOF and R-LOF.
4. The SPI and SET logic blocks need to process clock signals.
5. BDI is a maintenance signal transmitted from the downstream to the upstream station.
6. When the transmit end detects that b6-b8 of the K2 byte is 110, it indicates that the transmit end reports an MS-RDI alarm.
7. In SDH, the monitoring range is RSOH > MSOH > HPOH > LPOH.
8. The logical function module that generates the R-LOS is the SPI.
Video
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