Outgoing call screening
US6724874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2001 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Jan 17, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2207/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system include restricting destinations of a telephone call from a calling station, which has been assigned a privilege class. A service control point (SCP) stores blocking tables, based on privilege classes, and a privilege class control table, which associates the blocking tables with each privilege class. The SCP ascertains the assigned privilege class of the calling station and determines whether the telephone call corresponds to one of the types of blocking tables. When the telephone call does correspond, the SCP determines whether the assigned privilege class corresponds to the blocking table that corresponds to the attempted call. When there is no privilege class correspondence, the SCP bypasses validation of the called number. When there is privilege class correspondence, the SCP validates the called number and blocks the call when the called number is validated or continues call processing when the called number is not validated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.