requirements_and_architecture_for_emergency_calling----Page:7
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Requirements: Emergency identifier A1: Universal elements in call path need to recognize emergency call for special handling cannot use traditional numbers – too many, changing, conflicts with non-emergency numbers A2: Local users need to be able to dial the local emergency number (112, 911) even if device was bought non-locally A3: Recognizable proxies and other elements need to recognize emergency calls location insertion, security, routing A4: Minimal configuration A5: Secure configuration |