Arrangement for multiple custom calling
US4446553A · kind A · utility
7Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1981 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Oct 29, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The arrangement described herein provides for simple control and minimal program impact of a central office switching system for interfacing multiple custom calls. This arrangement employs a few simple trunks connected in a loop around configuration. The arrangement shown considers the establishment of a three way call by a three way calling subscriber who is already engaged as a non-control party in another custom calling subscriber's call waiting call.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.