Abstract
The article is devoted to the design of an information system for testing skills in working with modern switching arrangement on a laboratory bench based on the general-purpose visual modeling language UML. Precedents at the interaction of the system with the user (for example, a student) are described. A precedent diagram for the Panasonic NCP500 IP-PBX stand is carried out. Two scenarios for study by students the elements of an automatic telephone exchange is developed. The creation of interaction diagrams, illustrating the connection of objects in the process of fulfilling system requirements is considered. The structure of the developed software, reflecting its functionality, is formed. Keywords software means, information system, precedent, scenario, system operation, application, automatic telephone exchange, laboratory stand
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