Enhanced E911 Network Access for a Call Center Using Session Initiation Protocol (SIP) Messaging
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Accused Products
Abstract
A switched emergency call (e.g., a 911 call, an alarm company call) forwarded by a telematics call center is converted into a session initiation protocol (SIP) packetized phone call at the call center, and routed over an IP network, for presentation to an emergency services gateway, which connects to a selective router via dedicated circuits, gaining full access to the Enhanced 911 network. This provides a PSAP receiving a call from a telematics call center or other call center with all features available in an Enhanced 911 network, e.g., callback number of the 911 caller, and location of the 911 caller. Location of the caller is provided using a VoIP positioning center (VPC), queried from the call center. In this way, the switched emergency call is converted into a SIP packetized phone call and routed without further passage through the public switched telephone network (PSTN).
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Citations
32 Claims
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1-12. -12. (canceled)
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13. A method of passing an incoming wireless device communication to a call center, to a Public Safety Answering Point (PSAP), comprising:
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converting into a packetized Internet Protocol (IP) communication, at a call server, an incoming communication initiated on a wireless device from a given location; injecting location information into said converted packetized Internet Protocol (IP) communication; routing said converted packetized IP communication to a PSAP selected based on said given location; and routing a return packetized IP communication from said PSAP to said wireless device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for passing an incoming wireless device communication to a call center, to a Public Safety Answering Point (PSAP), comprising:
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means for converting into a packetized Internet Protocol (IP) communication, at a call server, an incoming communication initiated on a wireless device from a given location; means for injecting location information into said converted packetized Internet Protocol (IP) communication; means for routing said converted packetized IP communication to a PSAP selected based on said given location; and means for routing a return packetized IP communication from said PSAP to said wireless device. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification