Completing telecommunications calls in a competitive local and toll environment

US6324277A · kind A · utility

Assignee

• AT&T CORP. · US

Inventors

• Akinwale Akinpelu · Leonardo, US
• Promod Kumar Bhagat · Morganville, US
• Dana Lee Garoutte · Wheaton, US
• Anthony Hatalla · Clinton, US
• Robert Bruce Hirsch · Whippany, US
• Ali H. Krisht · Dearborn, US
• Chiu-Kai Lee · Holmdel, US
• James Shepard · Austin, US
• Dorothy V. Stanley · Warrenville, US
• Theodore Louis Stern · Suffern, US

Key dates

• Filing date: Feb 3, 1997
• Grant date: Nov 27, 2001
• Expiry date: Feb 3, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2213/13383
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In an environment of competitive local and interexchange carriers, offering number portability between local carriers serving a common region and between switches serving that region, each local carrier accesses a regional database to determine the identity of the carrier and switch serving a local customer. In addition, interexchange carriers access a national database to determine the identity of the carrier and switch serving the customer specified by the number dialed by an originating customer. For customers requiring high reliability service, alternate carriers can be used to serve such customers in case the primary carrier is unavailable; the databases identify these alternate carriers. Advantageously, this arrangement allows a high degree of freedom of movement of customers between carriers and geographic relocation without requiring a number change.