Network bridge method and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 29, 1995
Grant Date -
N/A
app pub date -
Sep 11, 1992
filing date -
Sep 11, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A network bridge between a DEC Ethernet network using LAT protocol and an Allen-Bradley Data Highway/Data Highway Plus (DH/DH+) network eliminates the need to use a DEC terminal server and Allen-Bradley KE/KF2 interface with their low data rates. A terminal server emulator is electrically connected to the DEC Ethernet network for stripping the LAT protocol from the DEC Ethernet network and provide DF1 formatted data. A converter module is electrically connected between the terminal server emulator and the DH/DH+ network for converting the DF1 data into DH/DH+ protocol data and for transmitting this data to the DH/DH+ network. The converter also converts data using DH/DH+ protocol which is received from the DH/DH+ network into DF1 data and transmits this data to the terminal server emulating means. The terminal server emulating means then places the DF1 formatted data into LAT packets and transmits the LAT packets to the Ethernet network. The terminal server preferably includes a commercially available LAT engine. The terminal server emulator and the converter preferably run on a general purpose microcomputer which includes an Ethernet interface board and an Allen-Bradley interface board.
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