requirements_and_architecture_for_emergency_calling----Page:11
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I11: Referral
I12: Multiple query protocols
I13: Robustness
work as long as PSAP itself is reachable
I14: Incrementally deployable
I15: Testable
check if call reaches right PSAP without tying up PSAP call taker resources
Requirements: identifying the correct PSAP
PPT Version