CONTENTS

 1     Scope 
 2     Normative references       
        2.1     Identical Recommendations | International Standards          
        2.2     Paired Recommendations | International Standards equivalent in technical content    
        2.3     Additional references         
 3     Definitions  
        3.1     Reference model definitions
        3.2     Service conventions definitions       
        3.3     Network Service definitions           
        3.4     X.25 definitions     
        3.5     X.21 definitions     
        3.6     ISDN definitions    
 4     Abbreviations   
        4.1     Reference model abbreviations       
        4.2     Network service abbreviations       
        4.3     X.25 abbreviations
        4.4     ISDN abbreviations           
        4.5     Other abbreviations           
 5     Overview   
 6     Control of underlying connections 
        6.1     Leased circuit connection   
        6.2     Circuit switched connection (including direct call)    
 7     Data link layer  
        7.1     Mode of protocol  
        7.2     Address assignment           
        7.3     Parameter values   
 8     Packet layer     
        8.1     General  
        8.2     Addressing
        8.3     QOS parameters   
        8.4     Window size and packet size parameters    
        8.5     Logical channel ranges       
        8.6     Role selection        
Annex  A     X.30 Terminal adaptors for ISDN
Annex  B     Bibliography