C-161

Ad Hoc Conference Call Between User Agents
Figure C-50. User Agent to User Agent to User Agent: Ad Hoc Conference Call: Disconnect Last Party — Diagram 2
VOCAL User Agent UA Marshal Redirect Server VOCAL User Agent VOCAL User Agent
16. INVITE
17. 100
18. INVITE
19. 200
20. 200
21. ACK
22. ACK
23. INVITE
24. 100
25. INVITE
26. 302
27. ACK
28. INVITE
29. 302
30. ACK
31. INVITE