Methods, apparatus and computer program products for associating local telephone numbers with emergency phone calls in a packet switched telephone system
First Claim
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).
1 Assignment
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Accused Products
Abstract
A packet switched telephone system includes a packet switched routing apparatus. The packet switched routing apparatus selectively associates a local telephone number with a phone call based on a called telephone number, and routes the phone call based on the called telephone number. The local telephone number may be substituted for a calling telephone number when the called telephone number corresponds to a predefined number, such as an emergency number. When the called telephone number corresponds to an emergency number, the phone call may be routed with the substituted local telephone number to a Public Safety Access Point (PSAP) that services the local area of the subscriber.
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Citations
18 Claims
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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). - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of routing phone calls in a packet switched telephone system, the method comprising:
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in response to receiving a phone call at a Voice Over Internet Protocol (VoIP) server, substituting a local telephone number for a calling telephone number from which the phone call originated in response to the phone call being directed to a Public Safety Access Point (PSAP); and routing 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). - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer program product for routing calls in a packet switched telephone system, the computer program product comprising:
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a computer readable storage medium having computer readable program code embodied therein that comprises; computer readable program code that is configured to be executed by a Voice Over Internet Protocol (VoIP) server 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). - View Dependent Claims (14, 15, 16, 17, 18)
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Specification