| 摘要 |
The correct PSAP that can service an emergency call originating from a VoIP terminal with the caller's geographic information embedded in the call signaling is determined. A latitude and longitude is extracted from geographic information that is embedded in the call signaling. In some cases only the civic address is available. Then a database is accessed to associate spatial polygons that represent the geographic boundaries of the 6000+ PSAPs in the nation to given latitude and longitude information extracted from the emergency call. The combination of these two important features together result in an accurate and precise“just-in-time”PSAP selection for the caller.
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