Method and device for confirming correct connection between data terminals in data communication system using telephone network
US4246442A · kind A · utility
12Cited by
18References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1977 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Apr 25, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a system of transceivers which can automatically operate either in calling or called modes, the identification codes of the calling and called transceivers are transmitted back and forth between them and compared in a manner which tends to minimize erroneous connections and to confirm only correct connections prior to starting the actual transmission of data between the transceivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.