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In recent years , with the constant expansion of the local telephone network , maintenance workload is growing , and form fill various maintenance is still using a semi - manual mode , it will not only slow , inconvenient saved data , query up the efficiency very is low. In this paper, the analysis of the telephone exchange to maintain the status quo of information work , to identify the shortcomings in the work , and the development of the local network telephone exchange maintenance of information systems . After much research and planning practice shows that the system has a good foundation of practice and theory based on technical feasibility , and has broad application prospects . Papers in the description of the sources and the background of the project , a preliminary analysis of the function of the system is required to complete , and then proceed with the project feasibility study and needs analysis , further functional analysis of the system , function block diagram , according to the local network telephone exchange maintenance the requirements of the information content of the work and needs analysis , the system is divided into eight functional module design . The system in conjunction with SQL Server 2000 and Powerbuilder to 9.0 , the concrete realization of the database and the function of each module . Finally, software testing, summing up the debugging process and results , and gradually improve the system function , and the present system there is a problem , solution , and my experience in the system design process . The system makes full use of the existing LAN system using existing computer center server , the database system is installed on the server above , the client is installed on a computer located in each of the maintenance unit , constitute a client / server architecture , maintenance personnel the client computer can easily take advantage of increase, modify, save, access a variety of maintenance information . The system uses SQL SERVER 2000 database management system , and use this excellent development tool -Powerbuilder 9.0 in the client / server architecture , analysis , design, development and maintenance of information systems on the local network telephone exchange .
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