CHAPTER 3. SIP Gateway Management
348
© SAMSUNG Electronics Co., Ltd.
SIP Gateway to SIP Gateway-Call via Redirect Server
Figure 28.8 shows the call of SIP Gateway to SIP Gateway using SIP Redirect
server. Table 28.2 briefly describes the messages used in the call flow.
Figure 3.8 SIP Gateway-to-SIP Gateway-Call Via SIP Redirect Server
User A PBX A
GW1 IP
Network
GW2 PBX
B
User B
RS
1. Setup
2. INVITE
3. 300 Multiple Choice
4. ACK
5. INVITE
6. Setup
7. Call
Proceeding
8. 100 Trying
9. Call
Proceeding
10. Alerting
11. 180 Ringing
12. Alerting
1-way Voice Path 2-way RTP channel
1-way Voice Path
13. Connect
14. 200 OK
15. Connect
16. Connect ACK
17. ACK
18. Connect ACK
2-way Voice Path 2-way RTP channel
2-way Voice Path
19. Disconnect
20. BYE
21. Disconnect
22. Release
23. Release
24. 200 OK
25. Release
Complete
26. Release
Complete
Summary of Contents for Ubigate iBG2016
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