Optimized routing of VoIP emergency calls
US7352847B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Sep 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2242/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for routing emergency calls is provided for emergency calls placed over a packet-switched network (310) from a Customer Premises Equipment (CPE) (110) at a remote location (100). The method includes: registering the CPE (110) with a home Internet Service Provider (ISP) (260) through a remote ISP (130) that is providing the CPE (110) access to the packet-switched network (310); determining that the CPE is at a remote location (100); obtaining a local Internet Protocol (IP) address that corresponds to a Public Safety Answering Point (PSAP) (170) serving the remote location (100); routing non-emergency calls to the home ISP (260) for call processing; and, handling emergency calls locally at the remote ISP (130) in accordance with the obtained local IP address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.