SYSTEM AND METHOD FOR DELIVERING CALLBACK NUMBERS FOR EMERGENCY CALLS IN A VOIP SYSTEM
First Claim
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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Accused Products
Abstract
In a VoIP system, a method and apparatus for tracking emergency callers is provided. A VoIP service provider network includes a plurality of VoIP phones and is connected to an emergency service provider system. The emergency service provider system includes a call server connected to the VoIP service provider network; a subscriber database; a VPC SBC; and a media gateway for connection to a PSTN. The call server is adapted to receive an emergency call from a VoIP telephone in the VoIP network; verify if the SIP URI has a DID bound to the SIP URI; if the SIP URI does not have a DID bound to the SIP URI, obtain a temporary DID from a DID pool and temporarily bind the temporary DID to the SIP URI; and forward the call to an appropriate PSAP in the PSTN. Should the emergency call be dropped, a person at the PSAP can call back the emergency caller without unnecessary delays.
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Citations
9 Claims
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1. A method for delivering callback numbers for emergency calls in a VoIP system, comprising the steps of:
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(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. - View Dependent Claims (2, 3)
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4. A method for delivering callback numbers for emergency calls in a VoIP system, comprising temporarily assigning a DID from a pool of DIDs to a VoIP endpoint during an emergency call, said DID mapping a callback number to an IP phone in a VoIP system.
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5. An emergency service provider system, comprising:
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a call server for connection to a VoIP service provider network;
a subscriber database;
a VPC SBC; and
a media gateway for connection to a PSTN;
said call server being adapted to;
receive an emergency call from a VoIP telephone in said VoIP network;
verify if the SIP URI has a DID bound to said SIP URI;
if the SIP URI does not have a DID bound to said SIP URI, obtain a temporary DID from a DID pool and temporarily bind said temporary DID to said SIP URI; and
forward the call to an appropriate PSAP in said PSTN.
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- 6. An emergency system according to claim 6, wherein said emergency system is a 911 system.
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8. A VoIP system comprising:
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a VoIP service provider network, said VoIP service provider network including a plurality of VoIP phones;
an emergency service provider system, said emergency service provider system including;
a call server for connection to said VoIP service provider network;
a subscriber database;
a VPC SBC; and
a media gateway for connection to a PSTN;
said call server being adapted to;
receive an emergency call from a VoIP telephone in said VoIP network;
verify if the SIP URI has a DID bound to said SIP URI;
if the SIP URI does not have a DID bound to said SIP URI, obtain a temporary DID from a DID pool and temporarily bind said temporary DID to said SIP URI; and
forward the call to an appropriate PSAP in said PSTN.
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9. A system according to claim 9, wherein at least one of said plurality of VoIP phones is a softphone.
Specification