The integration of a new energy management system (EMS) center into Hydro-Quebec's existing EMS has imposed major changes on its telecommunications environment, including modifications to the existing remote terminal units (RTUs) in its regional SCADA centers. The authors describe how, in order to integrate the different generations of technology, a transputer-based multiserver/multiclient gateway system was designed. The system is characterized by its relatively low cost, powerful processing capacity and compact size.
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