Proximity detection for telecommunications features
US4932050A · kind A · utility
53Cited by
3References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2242/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switching system in which telecommunications features are improved by the use of the proximity status of a telephone station set user. The status is transmitted to the switching system over the same telephone line used for the station set. The proximity status information simply defines the presence or absence of a person to answer calls to the station set without identifying a particular person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.