Enhanced E911 location information using voice over internet protocol (VoIP)
First Claim
1. A method of providing location information to a public safety answer point (PSAP) relating to a call from a VoIP device, comprising:
- converting, at a local voice-over-Internet Protocol (VoIP) gateway, a VoIP E911 call to a circuit switched 911 voice call;
establishing a plurality of dedicated trunk lines between said local VoIP gateway and a plurality of selective routers, local to said local VoIP gateway, and respectively associated with a plurality of PSAPs;
selecting, based on a received emergency routing key, a particular dedicated trunk line from said plurality of dedicated trunk lines; and
routing, from said local VoIP gateway to said selected particular dedicated trunk line, said converted VoIP E911 call-to-circuit switched 911 voice call to a particular PSAP associated with said VoIP E911 call.
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Accused Products
Abstract
An E-9-1-1 voice-over-IP (VoIP) solution is provided wherein a 911 call from a wireless VoIP device is routed directly to the correct Public Safety Answer Point (PSAP) via dedicated trunks, together with correct location information and call-back number. VoIP gateways are implemented locally, at least one per LATA, and accept VoIP packetized data inbound, and convert it to standard wireline voice calls. Calls are routed to an IP address at the VoIP gateway, which then egresses the call to a voice port at a selective router. Dedicated voice trunks (CAMA, SS7, FG-D) are installed between each local VoIP gateway and appropriate selective routers. An Automatic Location Identification (ALI) database is provisioned with ESRKs dedicated for VoIP use. TCP/IP circuits may be established between some or all of the various local VoIP gateways.
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Citations
30 Claims
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1. A method of providing location information to a public safety answer point (PSAP) relating to a call from a VoIP device, comprising:
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converting, at a local voice-over-Internet Protocol (VoIP) gateway, a VoIP E911 call to a circuit switched 911 voice call; establishing a plurality of dedicated trunk lines between said local VoIP gateway and a plurality of selective routers, local to said local VoIP gateway, and respectively associated with a plurality of PSAPs; selecting, based on a received emergency routing key, a particular dedicated trunk line from said plurality of dedicated trunk lines; and routing, from said local VoIP gateway to said selected particular dedicated trunk line, said converted VoIP E911 call-to-circuit switched 911 voice call to a particular PSAP associated with said VoIP E911 call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A voice-over-Internet Protocol (VoIP) gateway for providing location information to a public safety answer point (PSAP) relating to a call from a VoIP device, comprising:
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a converter, at a local voice-over-Internet Protocol (VoIP) gateway, to convert a VoIP E911 call to a circuit switched 911 voice call; a network interface to establish communication with a plurality of dedicated trunk lines between said VoIP gateway and a plurality of selective routers, local to said local VoIP gateway, and respectively associated with a plurality of PSAPs; a selector to select, based on a received emergency routing key, a particular dedicated trunk line from said plurality of dedicated trunk lines; and a router to route, from said local VoIP gateway to said selected particular dedicated trunk line, said converted VoIP E911 call-to-circuit switched 911 voice call to a particular PSAP associated with said VoIP E911 call. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification