Communication system having two opposed data processing units ea

Details Communication system having two opposed data processing units ea Communication system having two opposed data processing units ea

1995-10-17

1997-04-08

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082579, 34082518, 307112, 370360, H04Q 100

Patent

active

056191898

ABSTRACT:
A communication system includes a first data processing unit, a second data processing unit, and a data link line provided between the first data processing unit and the second data processing unit. A first monitor terminal controls the first data processing unit and monitors the first and second data processing units. A second monitor terminal controls the second data processing unit and monitors the first and second data processing units. A first switching circuit is coupled to the first data processing unit, the first monitor terminal and the data link line, and selectively connects two of the first data processing unit, the first monitor terminal and the data link line. A second switching circuit is coupled to the second data processing unit, the second monitor terminal and the data link line, and selectively connects two of the second data processing unit, the second monitor terminal and the data link line. The first switching circuit has a mode in which the first terminal is connected to the data link line and the second switching circuit has a mode in which the second data processing unit is connected to the data link line so that the first monitor terminal monitors the second data processing unit.

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