The statement that the value of FAS (Frame Alignment Signal) changes dynamically with different signals is false. The FAS is a fixed sequence placed at the start of the OTN frame structure to enable frame synchronization. It does not change dynamically, as its fixed pattern is crucial for reliable frame alignment and error detection. OTUk_LOF (Loss of Frame) alarms are generated when FAS framing fails, indicating synchronization loss. HCIP-Transmission stresses the fixed nature of FAS for consistent framing and alignment across the OTN network layers.
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