Methods and apparatus for providing emergency telephone service to IP-based telephone users
US7843934B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2003 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Nov 16, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/103
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.