S. Doyama, H. Watanabe

Research output: Contribution to journalConference articlepeer-review


In telecommunications networks, switching systems play an important role in realizing various services. The SPC (Stored Program Control) technique has been introduced to realize the varied ESS (Electrical Switching System) functions. However, large scale software development and maintenance have become critical. In an ESS software system, service facilities depend on call processing software. In the coming ISDN age, new network service function requirements will increase and become more diverse and complicated. Accordingly, the more rapid development of call processing software is vital in preparing the way for these highly integrated digital networks. This paper describes an expert system for the design of call processing software. The system is named the State transition diagram design expert system (STATES). It is intended to support design and prototyping of call processing software by employing SDL/PE (CCITT SDL state-oriented version using Pictorial Elements).

Original languageEnglish
Pages (from-to)118-123
Number of pages6
JournalIEE Conference Publication
Issue number259
Publication statusPublished - 1986 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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