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SYSTEM AND METHOD FOR DELIVERING CALLBACK NUMBERS FOR EMERGENCY CALLS IN A VOIP SYSTEM

  • US 20080063153A1
  • Filed: 08/21/2007
  • Published: 03/13/2008
  • Est. Priority Date: 08/21/2006
  • Status: Active Grant
First Claim
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1. A method for delivering callback numbers for emergency calls in a VoIP system, comprising the steps of:

  • (a) providing a pool of callback numbers consisting of a plurality of individual DIDs;

    (b) providing a plurality of IP phones, each phone being provided with a unique SIP URI;

    (c) at an emergency service provider, temporarily binding a DID to said SIP URI when an emergency call is made from at least one of said phones if said SIP URI is not already bound to a DID; and

    (d) marking said DID that is bound to said SIP URI as unavailable.

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