OTN Line card Signal Flow
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The OTN Line board implements the regeneration of one channel of optical signals. The wavelengths at the receive and transmit ends of the board are the ITU-T G.694.1-compliant DWDM wavelengths that carry OTU4 optical signals.
The optical receiving module receives the optical signals to be regenerated through the IN optical interface, and performs O/E conversion.
The signal processing module performs decoding, overhead processing and encoding of signals. During the process, the reshaping, regenerating and retiming based on electrical signals are performed, and the signals are encapsulated into OTN frames.
After encoding, the signals are sent to the optical transmitting module. After performing E/O conversion, the module sends out the OTU4 signals at DWDM standard wavelengths that comply with ITU-T G.694.1.
The optical signals are output through the OUT optical interface.
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