Dynamic E911 updating in a VoIP telephony system
US7697509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2005 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Feb 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2215/202
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method in one example comprises the steps of establishing a location database for a first network that associates Internet Protocol address information for VOIP telephony devices with physical locations for the VOIP telephony devices; upon detecting registration of a VOIP telephony device through a network port of the first network, determining physical location of the VOIP telephony device by identifying physical location of the network port through which the VOIP telephony device is connected, and updating the location database; and, upon detecting IP telephony activity originating from a remote VOIP telephony device connected to the first network through a VPN gateway, determining physical location of the remote VOIP telephony device connected through the VPN gateway by identifying physical locations of network resources of a second network to which the remote VOIP telephony device is connected, and updating the location database; such that updated location information is provided to a 911 server in the event that an emergency call is originated by any VOIP telephony device or remote VOIP telephony device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.