Method and system for using a network-provided location for voice-over-packet emergency services calls
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United States of America Patent
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Oct 13, 2009
Grant Date -
N/A
app pub date -
Jul 20, 2005
filing date -
Jul 20, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A client device transmits, via a voice-over-packet (VoP) access network, a message that requests an emergency services call. An outbound proxy server receives the message and obtains a network-provided location of the client device, e.g., by looking up the source address of the message in a location database maintained by the access network or by invoking an active network location function. The outbound proxy server inserts the network-provided location into the message, leaving any client-provided location in the message undisturbed, and forwards the message to an emergency services routing server. The emergency services routing server determines which public safety answering point (PSAP) should receive the call, based on at least one of the network-provided location and any client-provided location in the message.
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