Data communication system
US4177451A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | May 16, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a data communication system which carries out the transfer of data information. In said system, when one communication control unit is used as a transmitting side, said unit sends control signals, such as a receive command signal, to another communication control unit, and; when said one unit is used as a receiving side, said one unit sends control signals, such as various response signals, to said other communication control unit. In the data communication system according to the present invention, the same control signal has different meanings, depending on whether the communication control unit is used as a transmitting side or as a receiving side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.