CONTENTS

 1     Scope          
 2     References
 3     Definitions and acronyms     
 4     Abbreviations           
 5     Service flows for CRBT service           
        5.1     Gateway model            
        5.2     Application Server model          
        5.3     CRBT service by HTTP model    
        5.4     Call Server model         
        5.5     CRBT service priority   
        5.6     Interoperation from Application Server model to Gateway model            
 6     Service flows for CRT service             
        6.1     Gateway model            
        6.2     CRT service by Application Server model             
        6.3     CRT service by HTTP model      
        6.4     CRT service priority     
 7     Interaction of CRBT and CRT services             
        7.1     Interaction between originating CRBT/CRT and terminating CRBT/CRT   
        7.2     Interaction between terminating CRBT and originating CRT by AS model