Method and apparatus for interfacing to a local area network
US4809265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | May 1, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4625
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A controller for a bridge interconnecting local area networks operates in two modes. In a first mode the controller receives and transmits station data frames with previously appended frame check sums. In a second mode the controller responds to requests for information from stations by generating data frames from an associated memory. The controller computes and appends frame check sums and then transmits the frames and check sums to the requesting station. The controller is constructed and is effective to operate in a way which insures that all station data frames transmitted from stations to the bridge are received by the bridge without interruption or loss during all periods of operation. The controller receives all such frames at all times, including the time intervals during which circuitry in the controller must be off line and reprogrammed for changing operation between the first and second modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.