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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 |