CONTENTS

1 Scope 
 2 References 
        2.1 ITU-T references   
        2.2 IETF references     
        2.3 ETSI references     
        2.4 Other references    
3 Definitions  
4 Abbreviations and acronyms        
5 Reference model  
6 Assumptions     
7 Media availability in a SIP session
8 Codec 
        8.1 Codec list  
        8.2 Packetization size   
9 Routing and addressing    
10 Service level signalling profile      
       10.1 RFCs to be supported      
       10.2 SIP profile
       10.3 SDP profile          
11 Transport-level profile     
12 Call control signalling transport    
13 IP protocol version         
14 Security considerations   
Appendix I – Call/signalling flows     
        A.1 PSTN—IP—(NNI)—IP—PSTN
        A.2 PSTN—IP—(NNI)—IP—IP      
        A.3 IP—IP—(NNI)—IP—PSTN      
        A.4 IP—IP—(NNI)—IP—IP 
Bibliography