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;
transmitting said call to a telephone call service center with call origination information including said determined telephone number.
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.
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Citations
16 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;
transmitting said call to a telephone call service center with call origination information including said determined telephone number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communications system comprising:
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IP telephony devices located at different physical location;
an edge router including ports for coupling said IP telephony devices to said edge router;
a soft switch coupling said edge router, the soft switch being for routing calls from said IP telephony devices;
a PSTN telephone switch coupled to said soft switch for processing telephone calls having an SS7 call format, calls in said SS7 format including voice and control signals; and
a call service center coupled to said PSTN telephone switch for servicing telephone calls, said soft switch including;
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 via said PSTN telephone switch with call origination information including said determined telephone number. - View Dependent Claims (11, 12, 13)
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14. A location information database comprising:
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a plurality of landline telephone numbers with corresponding location information for each of said landline telephone numbers; and
a plurality of non-routing telephone numbers with corresponding location information for each of said non-routing telephone numbers. - View Dependent Claims (15, 16)
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Specification