Protection requirements

Optix OSN3500 SSN1D75S processing board appearance
The D75S veneer board can be used as an interface board for the PQ1 veneer board.
The D75S single board can be inserted in slots 19 to 26 and slots 29 to 36 of the main subrack.
The slots of the PQ1 single board and the corresponding slots of the D75S single board are shown in Table 1. The D75S with a small slot number accesses the 1st to 32nd E1 electrical signals, and the D75S with a large slot number accesses the 33rd to 63rd E1 electrical signals.