The Study Of An KY-2-Type Non-central Switching Factory Communication Telephone System

Presently the telephone communication system used in the factories is the intelligent non-central-switching amplifying call and telephone talk system. The bus topological structure and the multi-channels sharing are adopted. It makes many users share a lot of channels, and reduce the cost of the channels. The utilization factor of them is improved. It is flexible and convenient for users to extent, the price is low and its period is short, too. But this system can not be in contact with users who are out of factory lacking of dialing. We can not call the correct user and the disturbance is boring to other users. The telephone communication requisitions in factory are not satisfied, so a new type of factory communication system should be developed.Based on the intelligent non-central-switching amplifying call and telephone talk system, the KY-2-type non-central-switching factory communication telephone system is developed in this paper. The system is suitable for the large-scaled and strong-noised working space, is developed by using the techniques of the computer, the electronics and the communication. The technique of the multi-channels sharing and the bus topological structure are adopted in the system. The technique of the multi-channels sharing is an effective method to increase the system's capacity and the utilization factor of the channels. Without the central switch a lot of channels and tracks are shared by many users, the cost of the channels is reduced and the utilization factor of them is improved. User can call others by dialing the number, and the dialing is simple and quick. The internal user can call single user, a group of users and all of users by dialing different numbers. Call pertinence is improved and the disturbance to others is not existed. The reliability of non-central-switching system is more high than that of switching system because the communication process of non-central-switching system is not depend on switcher. We can keep in touch with users out of factory by track commutator. The wiring installation of project is very easy.The hardware and software are realized in detail after designing the system's organization in the article. The measures of anti-jamming are taken both in hardware and in software, and the DTMF signaling is used in the system. The theory of the shared channels is analyzed, and the method of the shared channels configuration is given. According to traffic, call congestion ratio and the number of users, we configured the number of channels and tracks. The experimental research is carried out, too.The KY-2-type non-central-switching factory communication telephone system has many advantages such as high utilization factor of the channels, fast communication by dialing, convenience for using and maintaining and so on. It has awide prospect and high value of application. It increases the touching rate for work and the level and efficient of production management. It has led to obviously economical and social profits.