CONTENTS

 1     Scope
 2     Background
 3     References
 4     Definitions and abbreviations
        4.1     Definitions
        4.2     Abbreviations
 5     Reference configuration
 6     Characteristics of the physical media dependent sublayer
        6.1     Physical medium characteristics of the UNI at 155 520 kbit/s
                  6.1.1     Bit rate and interface symmetry
                  6.1.2     Timing
                  6.1.3     Jitter and wander
                  6.1.4     Electrical interface
                  6.1.5     Optical interface
        6.2     Physical medium characteristics of the UNI at 622 080 kbit/s
                  6.2.1     Bit rate and interface symmetry
                  6.2.2     Timing
                  6.2.3     Jitter and wander
                  6.2.4     Electrical interface
                  6.2.5     Optical interface
 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
                  7.2.1     SDH-based
                  7.2.2     Cell-based
        7.3     ATM-specific TC functions
 8     OAM operational functionality
        8.1     SDH-based
                  8.1.1     Description of signals defined in Recommendation G.783 [10]
                  8.1.2     Cell delineation signals
                  8.1.3     Maintenance signals as defined in Recommendation G.783 [10]
                  8.1.4     Maintenance state tables
        8.2     Cell-based
                  8.2.1     Description of signals defined in Recommendation I.610 [8]
                  8.2.2     Cell delineation signals
                  8.2.3     Maintenance signals as defined in Recommendation I.610 [8]
                  8.2.4     Maintenance state tables
 9     Power feeding
        9.1     Provision of power
        9.2     Power available at B-NT1
        9.3     Feeding voltage
        9.4     Safety requirements