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Description
SSN1D12S overview
The D12S is a PDH interface switching board. The D12S can be used on the OptiX OSN equipment series to transmit and receive signals for the PDH processing board. In addition, when the corresponding PDH processing board is configured with the TPS protection, the interface switching board is required to perform the TPS protection.
Valid Slots
The D12S can be installed in slots 19–22 and 35–38 in the subrack and works as the interface board of the PQ1, or PQM.
Table 1 lists the slots valid for the PQ1/PQM and the corresponding slots for the D12S. The D12S installed in the slot with a smaller number transmits/receives the 1st to the 32nd channels of E1/T1 electrical signals. The D12S installed in the slot with a larger number transmits/receives the 33rd to the 63rd channels of E1/T1 electrical signals.
Table 1 Slots valid for the PQ1/PQM and the corresponding slots for the D12S
Slot Valid for the PQ1/PQM |
Corresponding Slot for the D12S |
|---|---|
| Slot 2 | Slots 19 and 20 |
| Slot 3 | Slots 21 and 22 |
| Slot 17 | Slots 35 and 36 |
Specifications of the ports
Port type |
Description |
|---|---|
| T1 electrical interfaces | T1 electrical interfaces |
| E1 electrical interfaces | 120 ohm E1 electrical interfaces |
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