Telcos

Specification and Validation of Telephone Systems in LOTOS

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Executive Summary

LOTOS (Language of Temporal Ordering Specification) is a Formal Description Technique that was developed by the ISO for the specification of OSI services and protocols. This paper presents a design methodology for the description in LOTOS of telephone systems with modern telephone features. The description of a Sample Telephone System is formalized. The LOTOS specification was extensively debugged and tested using the facilities provided by the University of Ottawa interpreter.

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