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1, such as the OSN3500 SLQ16 optical interface board
The first letter "S" stands for SDH, indicating that the output/input is STM-N signal.
The second letter "L" stands for Line, which means it is a line board.
The third letter "Q" is the initial letter of Quarter, which stands for 4, indicating that the single board supports 4-channel STM-N signal line output. The other letters "D" is the initial letter of Dual, which stands for 2, indicating that the single board supports 2-channel STM-N signals, such as SLD4. "O" is the initial letter of Octet, which stands for 8, indicating that the single board supports 8-channel STM-N signals, such as SLO4. "T" is the initial letter of Twelve, which stands for 12, indicating that the single board supports 12-channel STM-N signals. T" is the initial letter of Twelve, which stands for 12, indicating that the single board supports line output of 12-channel STM-N signals, such as SLT1. "H" is the initial letter of Hex, which stands for 16, indicating that the single board supports line output of 16-channel STM-N signals, such as SLH1. If the third letter does not have any letter, such as SL16 single board, it means that the single board supports the line output of 1 channel STM-N signal.
The fourth number, "16", means the signal rate is STM-16.
Other numbers such as, 64 represents STM-64; 4 represents STM-4; 1 represents STM-1
Other single boards, such as SL1, SLQ1, SLO1, SL4, SLD4, SLO4, SL64, etc. follow this rule.
2. If it is a single board like SF64, the
F stands for having FEC function. Similarly, 64 stands for STM-64. S stands for SDH.
Other single boards such as SF16 follow this rule.
3. in case of SEP1, when used as a circuit board.
S stands for SDH, E stands for electrical, P stands for process, and 1 stands for STM-1. its function is to complete the processing of 2-channel STM-1 electrical signals.
