TRAME(TRAnsmission of MEssages) was the name of the second computer network in the world similar to Internet to be used in an electric utility. Like Internet, the base technology was packet switching and it was developed by the electric utility ENHER in Barcelona and deployed by this same Utility first in Catalonia and Aragón, Spain, and later in other places. Its development started in year 1974 and the first routers, called nodes by that time, were deployed by year 1978. The network has been in operation until year 2016, obviously with successive technological software and hardware updates.
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