Configuration and evaluation of an emulator for telecommunication service specification including screening service

There is a need for technologies that can rapidly and accurately acquire th e request specifications for telecommunication services and that can mechan ically support specification verification in the upper-level process of the upstream processes of telecommunication service software development. In t his paper, we propose an emulator for telecommunication service specificati ons that supports improved understanding of a specification's operation by testing the operation based on the telecommunication service specification described by state transition rules (STRs), which constitute a declarative telecommunication service specification description language, and can verif y the validity of the telecommunication service specification and check for contention between multiple services. Specifically, network functions and terminal functions are set up in multiple work stations connected over a LA N. The service scenario described by the STRs is saved on the network funct ion side. Then based on the scenario, the operations are executed sequentia lly. We propose a system extension method corresponding to a screening serv ice that selects a service provided with specific conditions in a customize d service that is specified to match the user's preferences. This extension makes available an emulator of the comprehensive telecommunication service specifications, which include the screening conditions specified by the us er. Thus, further improvement in the user's satisfaction with the requests in the telecommunication service specification can be expected. The effecti veness of the system configured on the LAN was evaluated. (C) 2000 Scripta Technica.