Telephone interface call processing system with call selectivity
US5251252A · kind A · utility
85Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1991 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Oct 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13377
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
For use with a public telephone network CO incorporating a vast number of terminals Tl-Tn, a system CS limits and controls interface access to implement voice-digital communication for statistical processing. The system CS accommodates calls in different modes, e.g. "800", "900" or area code and incorporates qualifying apparatus to restrict against caller misuse. Alternative calling modes are used to reach an interface facility that also affords some control based on calling terminal identification, e.g. as by ANI equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.