Data transfer control apparatus
US3982061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1975 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Apr 23, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/1415
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a multi-device data transmission system with source and acceptor devices linked by a data highway and handshake lines, provision is made for automatically adjusting the delay of the handshake cycle to suit the highway length and other determinative factors. This is achieved in that the acceptors do not accept data until told so to do via one handshake line, whereas the source is only allowed to issue this command when it has been told via another handshake line that all acceptors have seen the data. The system determines its own delay in this way and automatically adapts the delay to whatever length of highway is employed, whether a fraction of a meter in a circuit board or several tens of meters in inter-rack wiring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.