Network support for fax retry blocking
US6987843B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Sep 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/32719
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for fax call blocking. The method includes: receiving a first call intended for an end instrument (10) employed by a user; obtaining a telephone number from which the first call originated; comparing the obtained telephone number against a first database (42) to determine if the obtained telephone number matches a blocked telephone number contained in the first database (42); blocking the first call such that the end instrument (10) is not alerted if a match is found between the obtained telephone number and a blocked telephone number, otherwise providing a connection to the end instrument (10) for the first call; monitoring the connection to detect for fax tone; and, entering the obtained telephone number in the database (42) as a blocked telephone number if fax tone is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.