CONTENTS

 1     Scope
 2     Background
 3     References
 4     Definitions and abbreviations
        4.1     Definitions
        4.2     Abbreviations
 5     Reference configuration
        5.1     Interface location with respect to reference configuration
        5.2     Interface location with respect to the customer installation
 6     Characteristics of the Physical Media Dependent (PMD) sublayer
 7     Functions provided by the Transmission Convergence (TC) sublayer
        7.1     Transfer capability
                  7.1.1     SDH-based
                  7.1.2     Cell-based
        7.2     Transport-specific TC functions
        7.3     ATM-specific TC functions
                  7.3.1     ATM cell format
                  7.3.2     Header Error Control (HEC)
                  7.3.3     Cell delineation
                  7.3.4     Scrambler operation
                  7.3.5     Idle cells
        7.4     OAM Implementation
 8     Operational functions
 9     Power feeding
Appendix I – Impact of random bit errors on cell delineation performance
Appendix II – Distributed sample scrambler implementation example