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Study of PBX and its Subsequent Development in Intercom System

Bikram Singh Chetri


A private branch exchange (PBX) is a telephone exchange that serves a particular business or office. It operates as a connection between a private organization - usually a business organization and the public switched telephone network (PSTN). However, the particular development of PBX in its prototype model is both expensive and not feasible. Hence, proposed project work is limited to study of PBX and a suitable prototype model it’s devised for an intercom system which form a part of a PBX system. An intercom system is an electronic intercommunication system which provides speaker communication between two or more location without the use of hand microphones. It had a dynamic range and can cope with anything from a whisper to a loud shout. The proposed circuit is fabricated successfully and is found to provide an efficient one to one communication between the speaker and the listener using wired intercom technology.
Keywords: Computer Aid, PSTN hardware, Electrical, Intercom software

Cite this Article
Bikram Singh Chetri. Study of PBX and its Subsequent Development in Intercom System. Journal of Control & Instrumentation. 2017; 8(1): 12–16p.

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