System and method for controlling free phone calls through an institutional phone system
US8295457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Nov 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2215/42
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of controlling free phone calls placed from within a secured premises through an institutional phone system generally includes assigning a unique access identifier to an individual caller upon entry into the secured premises; receiving a destination number from the individual caller within the secured premises, the destination number being associated with a telephone located outside the secured premises; determining if the destination number is a per se free number, and, if the destination number is not determined to be a per se free number: receiving the unique access identifier from the individual caller; validating the unique access identifier; and, if the unique access identifier is valid, processing a telephone call to the destination number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.