CONTENTS

 1     Scope
 2     References
 3     Abbreviations
 4     Definitions
 5     Architecture of the optical access network
        5.1     Network architecture
                  5.1.1     FTTCab/C/B scenario
                  5.1.2     FTTH scenario
        5.2     Reference configuration
                  5.2.1     Service Node Interface
                  5.2.2     Interface at the reference points S/R and R/S
        5.3     Functional blocks
        5.4     ONU functional block
                  5.4.1     Optical Distribution Network interface
                  5.4.2     Multiplexing
                  5.4.3     User Port
                  5.4.4     ONU powering
        5.5     Optical Line Termination functional block
        5.6     Optical Distribution Network functional block
 6     Services
 7     User Network Interface and Service Node Interface
 8     Optical network requirements
        8.1     Layered structure of optical network
        8.2     Physical medium dependent layer requirements for the wavelength allocation
        8.3     Physical medium dependent layer requirements for the ATM-PON
                  8.3.1     Digital signal nominal bit rate
                  8.3.2     Physical media and transmission method
                  8.3.3     Bit rate
                  8.3.4     Line code
                  8.3.5     Operating wavelength
                  8.3.6     Transmitter at O_ld and O_ru
                  8.3.7     Optical path between O_ld/O_ru and O_rd/O_lu
                  8.3.8     Receiver at O_rd and O_lu
        8.4     Physical medium dependent layer requirements for the Enhancement Band
 9     Operations Administration and Maintenance (OAM) functionality
10     Performance
11     Environmental condition
12     Safety
Appendix I – Optical interface parameters examples for ODN
        I.1     Introduction
        I.2     Examples
Appendix II – Deployment scenarios
       II.1     Introduction
       II.2     Configuration examples
                 II.2.1     Case 1: Reception of Basic Band only
                 II.2.2     Case 2: Reception of Basic Band and Enhancement Band signals by separate ONUs
                 II.2.3     Case 3: Reception of Basic Band and Enhancement Band signals by integrated ONUs
                 II.2.4     Case 4: Arrangement of WDMs to minimize upstream path loss
                 II.2.5     Case 5: ODNs with reduced attenuation range for Enhancement Band
                 II.2.6     Example in case of insufficiency of loss budget between E-ONU and E-OLT
Appendix III – Isolation between the Basic Band and the Enhancement Band
      III.1     Introduction
      III.2     Example for required isolation at Basic Band receiver from Enhancement Band signal
                III.2.1     Video services
                III.2.2     DWDM services
      III.3     Example of isolation classes
      III.4     Deployment examples
                III.4.1     Model to be considered
                III.4.2     In case of 64-QAM
                III.4.3     Filter characteristics
Appendix IV – Effect of optical return loss of ODN
       IV.1     Introduction
       IV.2     Effect of ODN optical return loss in the Basic Band
                 IV.2.1     Reflectance model to be considered
                 IV.2.2     Influence of reflectance into ONU receiver
                 IV.2.3     Influence of reflectance into OLT receiver (in the signal region)
                 IV.2.4     Influence of reflectance into OLT receiver (in the no signal region)
                 IV.2.5     Summary in effects of ODN optical return loss in the Basic Band
       IV.3     Influence of reflectance from Enhancement Band to Basic Band
                 IV.3.1     Influence of reflectance into OLT receiver from Enhancement Band
Appendix V – Optical parameters for reference point (c) and (e) and  two example deployment cases
        V.1     Introduction
        V.2     Optical level diagram examples
                  V.2.1     Case 1: ODN centric view of optical parameters
                  V.2.2     Case 2: Equipment centric view of optical parameters


NOTE - This Recommendation uses the term "ONU" to refer to both ONTs and ONUs. Any reference to ONUs includes ONTs as well within this Recommendation.