Optical data communication system
US4644587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1982 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Nov 22, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical data communication system using an optical star repeater which converts an optical signal transmitted from a terminal unit into an electric signal, amplifies the electric signal, reconverts the amplified electric signal into an optical signal, and then distributes the optical signal to respective terminal units inclusive of the terminal unit which transmitted the optical signal. The star repeater includes collision detector means for detecting a collision condition in communication, and output control means for interrupting the distribution of the optical signal to the terminal units. The output control means is controlled by an output of collision detector means so that, in response to a collision, it is caused to cut off the signal distribution to the terminal units. Simultaneously with the cut-off of the signal distribution, a collision signal indicating the occurrence of a collision is distributed to the respective terminal units, whereby the terminal units can accurately and immediately detect the collision condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.