Whether the FIU and SC1 boards can be configured at one site and the SFIU and SC1 boards can be configured at the other site when an optical supervisory channel exists between the two sites

No. The SFIU board must be used with the ST2 board. The SFIU board combines bidirectional optical supervisory signals of the ST2 board and transmits the signals in a single fiber, avoiding commissioning and compensation for IEEE 1588v2 signals.

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