CONTENTS

 1     Scope
 2     References
 3     Terms and definitions
 4     Abbreviations
 5     FEC features
        5.1     General principles of the FEC function
        5.2     Error monitoring capability
        5.3     Interest of the FEC function for submarine systems
        5.4     Inter-terminal channels
 6     Definition of the FEC function
        6.1     Definitions
        6.2     Forward Error Correction algorithm
        6.3     Properties of the RS(255,239) code
        6.4     FEC frame structure
                  6.4.1     FEC encoder and FEC decoder architectures
                  6.4.2     Framing structure
                  6.4.3     Scrambling
                  6.4.4     Redundancy ratio
 7     FEC function performance
        7.1     Theoretical FEC function performance
        7.2     Coding gain
Appendix I -FEC frame structure (optional)
        I.1     FEC encoder and FEC decoder architecture
        I.2     Framing structure
        I.3     Scrambling
        I.4     Redundancy ratio