Nationwide table routing of voice over internet protocol (VoIP) emergency calls
First Claim
1. A method of providing routing of an emergency call to a reliably proper public safety access point (PSAP), comprising:
- receiving a request for location relating to an emergency call from an emergency wireless deviceobtaining a street address associated with said emergency wireless device;
determining at least one PSAP associated with a ZIP code of said street address;
determining at least one PSAP associated with an emergency services number (ESN) assigned to said emergency call; and
providing for use by a routing device an identity of a matching unique PSAP associated with both a ZIP code of said street address and said ESN.
4 Assignments
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Accused Products
Abstract
The present invention is used in an emergency network to identify and provide the correct public safety access point (PSAP) to service an emergency call originating from a Voice Over Internet Protocol (VoIP) subscriber. Data stores in an emergency services network associate PSAPs to an input ZIP code obtained from a street address returned from an MSAG relating to a VoIP call, and PSAPs to an input ESN. An emergency caller'"'"'s civic street address is matched against a nationwide MSAG data store to result in a MSAG ESN. From the street address, the emergency caller'"'"'s ZIP code is matched to a PSAP in an appropriate ZIP/PSAP data store. A matching PSAP from both the ZIP/PSAP and PSAP/ESN data stores determines with great reliability the identity of the proper PSAP for that emergency caller.
105 Citations
7 Claims
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1. A method of providing routing of an emergency call to a reliably proper public safety access point (PSAP), comprising:
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receiving a request for location relating to an emergency call from an emergency wireless device obtaining a street address associated with said emergency wireless device; determining at least one PSAP associated with a ZIP code of said street address; determining at least one PSAP associated with an emergency services number (ESN) assigned to said emergency call; and providing for use by a routing device an identity of a matching unique PSAP associated with both a ZIP code of said street address and said ESN. - View Dependent Claims (2, 3, 4, 5)
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6. A table routing data store in communication with an emergency 911 network, comprising:
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a first table associating input ZIP codes with serving public safety access points (PSAPs); and a second table associating input emergency services numbers (ESNs) with PSAPs; and a physical interface in communication with a routing device; wherein an emergency call is routed by said routing device to a PSAP matched in both said first table and said second table to a given emergency call. - View Dependent Claims (7)
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Specification