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EMERGENCY CALL LOCALIZATION FOR IP-BASED TELEPHONY

  • US 20080152092A1
  • Filed: 12/18/2007
  • Published: 06/26/2008
  • Est. Priority Date: 12/20/2006
  • Status: Active Grant
First Claim
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1. A method for localizing an initial point of an Internet Protocol (IP)-based telephone call, said method comprising:

  • receiving, by a Telephony Application Server (TAS)-Proxy, the IP-based telephone call originating from a Voice-over-IP (VoIP) subscriber, said IP-based telephone call characterized by an IP address of the VoIP subscriber and by a called telephone number of an entity being called;

    ascertaining, by the TAS-Proxy, that the IP-based telephone call is an emergency call;

    by an emergency call application in response to said ascertaining, transmitting to a replication database a request for emergency call data configured to be used for identifying an initial point of the emergency call, said request comprising the IP address;

    by a software application comprised by the replication database in response to the replication database having received the transmitted request, determining the emergency call data from the IP address followed by transmitting the emergency call data to the emergency call application, said emergency call data identifying a local responsible Public Safety Answering Point and comprising an Emergency ID that includes a reference to technical data that can be used to locate the initial point of the emergency call;

    by the emergency call application in response to having received the transmitted emergency call data, sending the emergency call data to the TAS-Proxy; and

    by the TAS-Proxy in response to having received the emergency call data sent by the emergency call application, routing the IP-based emergency call to the local responsible Public Safety Answering Point and transmitting the Emergency ID to the local responsible Public Safety Answering Point for enabling the local responsible Public Safety Answering Point to locate the initial point of the emergency call.

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