CONTENTS

 1     Scope 
 2     References 
 3     Abbreviations   
 4     Definitions  
 5     SIP interworking architectures      
        5.1     SIP to  BICC [IP or ATM]           
        5.2     BICC [IP or ATM] to SIP
        5.3     SIP to ISUP          
        5.4     ISUP to SIP          
        5.5     ISUP to SIP-I       
        5.6     SIP-I to ISUP       
        5.7     BICC to SIP-I      
        5.8     SIP-I to BICC      
        5.9     Architecture of the interworking function     
 6     Capabilities supported at interworking serving node          
        6.1     SIP profiles for interworking between SIP and BICC/ISUP
 7     Trust model
 8     Tones, announcements and switch through