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RR case #1 (1) + (2): initial INVITE (2) + (3): mid-dialog request (1) +-----------+ (2) +-----------+ ------>| |--------------->| | | | | | (3) | Proxy | (4) | User | ------>| |--------------->| Agent | | | | | +-----------+ +-----------+ Need to make sure proxy knows to execute location service when getting mid-dialog request with Route header for itself |