CONTENTS

 1     Scope 
 2     References 
        2.1     Normative references         
        2.2     Informative references        
 3     Definitions  
 4     Abbreviations   
 5     General framework of the AAL type 2 signalling protocol 
        5.1     Interface between the AAL type 2 signalling entity and the AAL type 2 served user 
        5.2     Interface between the AAL type 2 signalling entity and the generic signalling transport    
        5.3     Interface between the AAL type 2 signalling entity and layer management    
 6     Forward and backward compatibility       
        6.1     Backward compatibility rules         
        6.2     Forward compatibility mechanism  
 7     Format and coding of AAL type 2 signalling protocol       
        7.1     Coding conventions for the AAL type 2 signalling protocol 
        7.2     Format and coding of the AAL type 2 signalling protocol messages 
        7.3     Parameter specification of the AAL type 2 signalling protocol messages      
        7.4     Field specification of the AAL type 2 signalling protocol parameters
 8     Procedure of the AAL type 2 signalling protocol   
        8.1     Compatibility         
        8.2     Nodal functions     
        8.3     Protocol entity       
        8.4     List of timers          
Annex A – Support for non-switched scenario    
        A.1     Introduction          
        A.2     References
        A.3     Definitions 
        A.4     Abbreviations       
        A.5     General framework of the AAL type 2 signalling protocol  
        A.6     Forward and backward compatibility        
        A.7     Format and coding of AAL type 2 signalling protocol         
        A.8     Procedure of the AAL type 2 signalling protocol    
Annex B – Coding of the compatibility information    
        B.1     Coding of the compatibility information for CS-1 and CS-2 networks using link characteristics for connection resource allocation    
        B.2     Coding of the compatibility information for CS-1 and CS-2 networks using service specific information for connection resource allocation    
        B.3     Coding of the compatibility information of the new parameters for CS-1 and CS-2 networks    
Annex C – Interworking with CS-1 and CS-2 nodes for connection resource allocation    
        C.1     Connection resources indicated with link characteristic parameters 
        C.2     Connection resources indicated with service specific information parameters           
        C.3     Service Specific Information indicated with SSCS information parameters  
Annex D – SDL Definition of the AAL type 2 Signalling Protocol    
Appendix I – Example message sequences    
        I.1     Successful establishment and release           
        I.2     Unsuccessful establishment 
        I.3     Management message sequences    
        I.4     Release crossover/release collision  
        I.5     Resource contention           
        I.6     Successful modification       
        I.7     Unsuccessful modification   
        I.8     Modification Collision         
Appendix II – Conversion of CS-1 or CS-2 (Preferred) Link Characteristics to  (Preferred) Transfer Capability parameters    
       II.1     Guidelines and definitions    
       II.2     Bit rates  
       II.3     Maximum allowed packet sizes       
       II.4     Token bucket sizes 
       II.5     Determination of the TC class         
       II.6     Source traffic type  
Appendix III – Interworking examples    
      III.1     Symbols and abbreviations 
      III.2     Connection Establishment   
      III.3     Connection Resource Modification