Patent · US Active

System for VOIP based emergency stand alone service

US8059798B1 · kind B1 · utility

4Cited by

3References

3Claims

0Family size

Inventors

Michael Skubisz · Durham, US
Edward F Holmes · Durham, US
Brian St. Pierre · Acworth, US
David L. Cullerot · Manchester, US

Key dates

Filing date	Aug 30, 2007
Grant date	Nov 15, 2011
Priority date	—
Expiry date	Jul 24, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04M2242/04
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Method and apparatus for ad hoc cooperative routing in an IP network. Included is an emergency stand alone (ESA) system that provides a bypass to a failed TDM switch for multiple communication devices in communication with one or more TDM switches. One or more internet protocol media gateways communicate a multicast signal upon the failure of a switch. The multicast initiates Voice over IP communication between endpoints, bypassing the failed switch.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.