CONTENTS

 1     Scope 
 2     References 
 3     Definitions  
 4     Abbreviations   
 5     Methodology    
        5.1     Conventions for representation of BICC/ISUP PDU          
        5.2     Conventions for representation of SIP/SDP information      
        5.3     General principles  
        5.4     ISUP encapsulation – detailed procedures  
        5.5     sip: and sips: URIs 
 6     Incoming call interworking from SIP to BICC/ISUP at I‑IWU      
        6.1     Sending of Initial Address Message (IAM) 
        6.2     Receipt of subsequent INVITE      
        6.3     Sending of COT    
        6.4     Receipt of Connect message (CON)          
        6.5     Receipt of ACM    
        6.6     Receipt of CPG     
        6.7     Receipt of Answer Message (ANM)          
        6.8     Through connection of the bearer path        
        6.9     Receipt of Suspend message (SUS) network initiated         
       6.10     Receipt of Resume message (RES) network initiated         
       6.11     Release procedures at the I‑IWU  
 7     Outgoing call interworking from BICC/ISUP to SIP at O‑IWU    
        7.1     Sending of the first INVITE           
        7.2     Receipt of SAM after INVITE has been sent         
       7.3      Receipt of 18X response   
        7.4     Expiry of timers and sending of early ACM
        7.5     Receipt of 200 OK INVITE          
        7.6     Through connection of BICC/ISUP bearer path     
        7.7     Release procedures at the O‑IWU 
        7.8     Timers at O‑IWU  
 8     Bibliography (informative)
Annex A – BICC specific interworking for basic call     
        A.1     Introduction          
        A.2     Interworking BICC to/from SIP with common media bearer technology and BICC supports "Bearer Control Tunnelling"    
        A.3     Bearer Control Interworking Function       
Annex B – Interworking for ISDN supplementary services    
        B.1     Interworking of CLIP/CLIR supplementary service to SIP networks          
        B.2     Interworking of COLP/COLR supplementary service to SIP networks       
        B.3     Interworking of Direct‑Dialling‑In (DDI) supplementary service to SIP networks    
        B.4     Interworking of Malicious Call Identification (MCID) supplementary service to SIP networks    
        B.5     Interworking of Sub‑addressing (SUB) supplementary service to SIP networks      
        B.6     Interworking of Call Forwarding Busy (CFB)/Call Forwarding No Reply (CFNR)/Call Forwarding Unconditional (CFU) supplementary services to SIP networks    
        B.7     Interworking of Call Deflection (CD) supplementary service to SIP networks         
        B.8     Interworking of Explicit Call Transfer (ECT) supplementary service to SIP networks          
        B.9     Interworking of Call Waiting (CW) supplementary service to SIP networks
       B.10     Interworking of Call Hold (HOLD) supplementary service to SIP networks           
       B.11     Interworking of Completion of Calls to Busy Subscriber (CCBS) supplementary service to SIP networks    
       B.12     Interworking of Completion of Calls on No Reply (CCNR) supplementary service to SIP networks    
       B.13     Interworking of Terminal Portability (TP) supplementary service to SIP networks  
       B.14     Interworking of Conference Calling (CONF) supplementary service to SIP networks        
       B.15     Interworking of Three‑Party Service (3PTY) supplementary service to SIP networks        
       B.16     Interworking of Closed User Group (CUG) supplementary service to SIP networks          
       B.17     Interworking of Multi‑Level Precedence and Preemption (MLPP) supplementary service to SIP networks    
       B.18     Interworking of Global Virtual Network Service (GVNS) supplementary service to SIP networks    
       B.19     Interworking of International Telecommunication Charge Card (ITCC) supplementary service to SIP networks    
       B.20     Interworking of Reverse Charging (REV) supplementary service to SIP networks  
       B.21     Interworking of User‑to‑User Signalling (UUS) supplementary service to SIP networks    
Annex C    
        C.1     SIP/SIP‑I references (normative)  
        C.2     The P‑Asserted‑Identity SIP header extension (normative)
Appendix I – Interworking scenarios between SIP and BICC    
        I.1        Scope   
        I.2        Definitions
        I.3        Abbreviations      
        I.4        Methodology       
        I.5        Interworking of SIP accesses to BICC     
Appendix II – Interworking scenarios between SIP and ISUP    
       II.1     Scope     
       II.2     Definitions  
       II.3     Abbreviations         
       II.4     Methodology         
       II.5     Interworking of SIP Access to ISUP          
Appendix III – Interworking scenarios between Profile C (SIP‑I) and ISUP    
      III.1     General   
      III.2     Interworking of ISUP with SIP using Profile C (SIP‑I)