- MSOH: Multiplex Section Overhead
- RSOH: Regeneration Section Overhead
The STM-1 base frame is structured with the following characteristics:
- Length: 270 column × 9 row = 2430 bytes
- Byte: 1-byte = 8 bit
- Duration (Frame repetition time): 125 Ξs i.e. 8000 frame/s
- Rate (Frame capacity): 2430 × 8 × 8000 = 155.5200 Mbit/s
The STM-1 frame is on the basic transmission format for SDH (Synchronous Digital Hierarchy). A STM-1 frame has a byte-oriented structure with 9 rows and 270 columns of bytes, for a total of 2,430 bytes (9 rows * 270 columns = 2430 bytes). Each byte corresponds to a 64kbit/s channel.
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