sip-1----Page:7
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RR Case #2
(1) + (2) + (3): initial INVITE
(4) - (9): mid-dialog request




(1) +-----------+ (2) +-----------+ (3) +-----------+
---->| |------->| |-------->| |
(4) | | (5) | | | |
---->| Home |------->| Edge | | User |
| Proxy | (7) | Proxy | (8) | Agent |
+-->| |------->| |-------->| |
| +-----------+ +-----------+ +-----------+
| |
| |
+------------------------------+

Soln: EP removes RR from 200 OK from UA if Supported: gruu is there
PPT Version