Networking Scenarios
Based on the actual hardware configurations, the FD system can implement line fiber quality monitoring in two-fiber bidirectional and single-fiber bidirectional networking scenarios. This topic describes the typical networking scenarios for line fiber quality monitoring.
Precaution
· The TN12ST2 or TN11AST2 board can be connected to an FIU, DAPXF, SFIU, OLSP or OLSPA/OLSPB board.
· The FIU board connected to a TN12ST2 or TN11AST2 board and its peer FIU board must be TN13FIU03, TN16FIU01, or TN11SFIU01.
· The DAPXF board connected to TN12ST2 or TN11AST2 is TN52DAPXF. Within the same OMS, the DAPXF board can be interconnected with an FIU, SFIU, or another DAPXF board, but the interconnected boards must have the same mode. In other words, the interconnected boards must all function as FIU boards or all function as SFIU boards. If the board modes are different, the fiber quality monitoring function becomes unavailable.
· The OLSP board connected to a TN12ST2 or TN11AST2 board and its peer OLSP board must be TN11OLSP01. The OLSP board is used in the two-fiber bidirectional transmission scenario.
· The OLSPA/OLSPB board connected to the TN12ST2 or TN11AST2 board and the peer OLSPA/OLSPB board can be only TN11OLSPA01 or TN11OLSPB01, and TN11OLSPA and TN11OLSPB boards must be used in pairs. For example, if TN11OLSPA01 is used at one end of a fiber, TN11OLSPB01 must be used at the other end of the fiber. The OLSPA/OLSPB board is used in the single-fiber bidirectional transmission scenario.
· On a short fiber span, a fixed optical attenuator (FOA) needs to be added so that the fiber insertion loss is greater than 15 dB, preventing a receiver overload issue. For a TN12ST2 or TN11AST2 board, the fixed optical attenuator (FOA) can be configured only on the RMn port of the board rather than the TMn or TXn port of other OSC boards.
· The TN11AST2 board can be interconnected only with the same board and the TNF1AST4 board on OptiX OSN 1800.


