Plugging in/Pulling out and Replacing Board
Names of each part
1. Service processing board (such as PQ1) 2. Service interface
4. STM-1/4/16 system control, cross-connect, optical interface board
6. Front panel
board (such as D75S)
7. Signal cable interface
3. Optical interface board (such as
SL16)
5. Auxiliary interface board (SAP)
8. Optical interface
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