Half-duplex modem without turnaround delay
US4669090A · kind A · utility
20Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1985 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Jul 5, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modem is operated in a half-duplex mode having various elements which are trained on data and which are locked up while data is not exchanged, thereby eliminating the need for a preamble. A preamble is used only if the period between successive transmissions exceeds a preselected threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.