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 method of routing phone calls in a packet switched telephone system, the method comprising:
- in response to a phone call being directed to a called telephone number corresponding to an emergency number, substituting a local telephone number of a subscriber for a calling telephone number associated with the phone call, wherein the calling telephone number is different than the local telephone number, wherein the substitution of the local telephone number for the calling telephone number is carried out within a Voice Over Internet Protocol (VoIP) server; and
routing the phone call with the substituted local telephone number based on the called telephone number to a Public Safety Access Point (PSAP), wherein the substituted local telephone number can be dialed 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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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
12 Claims
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1. A method of routing phone calls in a packet switched telephone system, the method comprising:
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in response to a phone call being directed to a called telephone number corresponding to an emergency number, substituting a local telephone number of a subscriber for a calling telephone number associated with the phone call, wherein the calling telephone number is different than the local telephone number, wherein the substitution of the local telephone number for the calling telephone number is carried out within a Voice Over Internet Protocol (VoIP) server; and routing the phone call with the substituted local telephone number based on the called telephone number to a Public Safety Access Point (PSAP), wherein the substituted local telephone number can be dialed 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 packet switched telephone system, comprising:
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a Voice Over Internet Protocol (VoIP) server that is configured to associate a local telephone number with a subscriber, to respond to a phone call having a calling telephone number of the subscriber by substituting the local telephone number for the calling telephone number in response to the called telephone number corresponding to an emergency number, and to route the phone call with the substituted local telephone number based on the called telephone number to a Public Safety Access Point (PSAP); wherein the calling telephone number is different than the local telephone number, and wherein 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)
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10. 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, the computer readable program code comprising; computer readable program code that is configured to be executed by a Voice Over Internet Protocol (VoIP) server to substitute a local telephone number of a subscriber for a calling telephone number associated with a phone call in response a called telephone number to which the phone call is directed corresponding to an emergency number, wherein the calling telephone number is different than the local telephone number; and computer readable program code that is configured to be executed by the VoIP server to route the phone call with the substituted local telephone number based on the called telephone number to a Public Safety Access Point (PSAP), wherein the substituted local telephone number can be dialed by an operator at the PSAP to return the phone call to the subscriber through a Public Switched Telephone Network (PSTN). - View Dependent Claims (11, 12)
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Specification