CONTENTS

 1     Introduction     
 2     Modifications to existing clauses of [ITU-T G.984.3]   
        2.1     Clause 9.2.3.1 Upstream_Overhead message       
        2.2     Clause 9.2.3.8 Encrypted_VPI/Port-ID message  
        2.3     Clause 9.2.4.1 Serial_Number_ONU message     
        2.4     Clause 9.2.4.5      
        2.5     Clause 11.1.1 Items detected at OLT       
        2.6     Appendix I Transport of user traffic over GEM channels
 3     New clause I.4