Caller identification interface using line reversal detection
US5905794A · kind A · utility
51Cited by
29References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An interface for modems is described which provides rapid identification of a caller and limited access based on a variety of parameters obtained from caller identification information encoded by the telephone company. A line reversal detector is incorporated to signal when the caller identification information is available for reception. A two stage detection system is used to eliminate false signaling of line reversals and discriminate line reversals from ringing and other noise signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.