Methods and apparatus for providing emergency telephone service to IP-based telephone users
First Claim
1. A method of servicing an IP call from an IP telephony device, the method comprising the steps of:
- determining a telephone number associated with the physical location from which the IP call originated, wherein said determined telephone number is a telephone number that is not used for call routing purposes but is stored in a location information database in association with an address corresponding to the determined physical location;
transmitting said call to a telephone call service center with call origination information including said determined telephone number, said call service center being an emergency call service center; and
using the determined telephone number to retrieve, from a database including telephone numbers and associated location information, address information corresponding to the physical location from which the call was placed.
2 Assignments
0 Petitions
Accused Products
Abstract
For purposes of servicing emergency calls, such as 911 calls, a telephone number is associated with each edge router port used to provide IP service to a customer premise location. A telephone number is associated with the edge router port and the corresponding customer location. The telephone number and location information are stored in a database used for providing emergency calling party location information. When a switch used for routing IP calls detects a telephone call to an emergency call center it determines the edge router port from which the call was placed and the telephone number associated with the port for emergency call purposes. The call is then forwarded to the emergency call service center with the determined telephone number being supplied as the calling party number. Performing a lookup operation using the supplied telephone number the emergency service operator determines the location from which the call was placed.
47 Citations
13 Claims
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1. A method of servicing an IP call from an IP telephony device, the method comprising the steps of:
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determining a telephone number associated with the physical location from which the IP call originated, wherein said determined telephone number is a telephone number that is not used for call routing purposes but is stored in a location information database in association with an address corresponding to the determined physical location; transmitting said call to a telephone call service center with call origination information including said determined telephone number, said call service center being an emergency call service center; and using the determined telephone number to retrieve, from a database including telephone numbers and associated location information, address information corresponding to the physical location from which the call was placed. - View Dependent Claims (2, 3)
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4. A communications system comprising:
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an edge router including ports coupled to IP telephony devices; a soft switch coupled to said edge router, the soft switch being for routing calls from said IP telephony devices; a call service center for servicing telephone calls; a location information database coupled to said call service center, the location information database including; telephone numbers corresponding to landline telephones, a physical location being associated in said database with each landline telephone number; and non-routing telephone numbers corresponding to locations of IP service subscribers, address information corresponding to a physical location being associated in said database with each non-routing telephone number; and wherein said soft switch includes; means for determining a telephone number associated with the physical location from which an IP call originated; and means for transmitting IP calls to said call service center with call origination information including said determined telephone number. - View Dependent Claims (5, 6, 7, 8)
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9. A method of servicing an IP communication from an IP device, the method comprising the steps of:
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determining a non-routing telephone number associated with the physical location from which the IP communication originated, wherein said determined non-routing telephone number is a telephone number that is not used for call routing purposes but is stored in a location information database in association with an address corresponding to the determined physical location; transmitting said determined non-routing telephone number as part of a telephone call to a telephone call service center with said determined non-routing telephone number being provided to said service center as a call origination telephone number, said call service center being an emergency call service center; and using the determined non-routing telephone number to retrieve, from a database including telephone numbers and associated location information, address information corresponding to the physical location from which the IP communication originated. - View Dependent Claims (10, 11)
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12. A system for servicing an IP call from an IP telephony device, the system comprising:
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a switching device configured to; determine a telephone number associated with the physical location from which the IP call originated, wherein said determined telephone number is a telephone number that is not used for call routing purposes but is stored in a location information database in association with an address corresponding to the determined physical location; and transmit said call to a telephone call service center with call origination information including said determined telephone number, said call service center being an emergency call service center; and said call service center, said call service center being configured to use the determined telephone number to retrieve, from a database including telephone numbers and associated location information, address information corresponding to the physical location from which the call was placed. - View Dependent Claims (13)
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Specification