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Methods, apparatus and computer program products for associating local telephone numbers with emergency phone calls in a packet switched telephone system

  • US 8,223,750 B2
  • Filed: 08/03/2009
  • Issued: 07/17/2012
  • Est. Priority Date: 05/10/2004
  • Status: Active Grant
First Claim
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1. A packet switched telephone system, comprising:

  • a Voice Over Internet Protocol (VoIP) server that is configured to route a phone call that is directed to a Public Safety Access Point (PSAP) by substituting a local telephone number for a calling telephone number from which the phone call originated, and to route the phone call with the substituted local telephone number to the PSAP, wherein the calling telephone number is different than the local telephone number, and the substituted local telephone number can be called by an operator at the PSAP to return the phone call to the subscriber through a Public Switched Telephone Network (PSTN).

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