Integration of VoIP address discovery with PBXs

US8228903B2 · kind B2 · utility

Assignee

• Cisco Technology, Inc. · US

Inventors

• Jonathan Rosenberg · Freehold, US
• John K. Restrick, Jr. · Palo Alto, US
• Cullen Jennings · San Jose, US
• Hakim N. Mehmood · Plano, US
• Mark L. Hendrickson · Bainbridge Island, US
• John D. Alexander · Richardson, US

Key dates

• Filing date: Jun 30, 2009
• Grant date: Jul 24, 2012
• Expiry date: Nov 11, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M2203/551
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A system for verifying VoIP call routing information. The system may include an apparatus integrated with a private branch exchange (PBX). The apparatus may store at least one call attribute of a public switched telephone network (PSTN) call initiated to a destination telephone number. The apparatus may verify a destination Voice-over-Internet-Protocol (VoIP) call agent for the destination telephone number based on demonstrated knowledge of the PSTN call. The apparatus may route a new call either over a VoIP network to the destination VoIP call agent or over a circuit switched network based on whether the destination VoIP call agent is verified for the destination telephone number.