Patent · US Active

Using PSTN reachability to verify VoIP call routing information

US8199746B2 · kind B2 · utility

19Cited by

29References

28Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Jonathan Rosenberg · Freehold, US
Cullen Jennings · San Jose, US
Daniel G. Wing · San Jose, US

Key dates

Filing date	Jul 20, 2007
Grant date	Jun 12, 2012
Priority date	—
Expiry date	Jul 13, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04M2203/551
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A system for verifying VoIP call routing information. In particular implementations, a method includes verifying one or more Voice-over-Internet-Protocol (VoIP) call agents for respective destination telephone numbers based on demonstrated knowledge of previous public switched telephone network (PSTN) calls to the respective destination telephone numbers; receiving a call initiation message identifying a destination telephone number; and conditionally initiating a call over a VoIP network to a target VoIP call agent, or over a circuit switched network, based on whether the target VoIP call agent has been verified for the destination telephone number identified in the call initiation message.

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