Visual message waiting indication in a telephone voice message system
US5521964A · kind A · utility
23Cited by
9References
53Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Oct 28, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone system which offers a voice message service and which enables visual indication of waiting messages at subscriber locations using suppressed ringing connections through the switching network of the system and in which acknowledgement signals are provided to the system by the subscriber locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.