System for providing data services to a circuit switched exchange
US4789981A · kind A · utility
7Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/0428
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for providing data services in an evolutionary fashion as well as providing access to external data communication networks for subscribers to a circuit switched voice exchange includes a data services adjunct connected in series with presently existing voice communication paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.