![]() ![]() ![]() A telephone, as defined by Alexander Graham Bell, is an instrument of communication that converts sound, specifically the human voice, into electrical signals that are transmitted over a network to another instrument that reconverts the signals into an audible reproduction of the original voice. Landline telephones use a physical connection, while mobile phones use wireless technology such as cellular networks. It allows two or more people to talk to each other by converting sound into electrical signals that are transmitted to the other end, where they are converted back into sound. This experiment laid the foundation work in the telecommunication industry that is now the lifeline of not only big industries but also individuals. ISRO CS Syllabus for Scientist/Engineer ExamĪ telephone is a device used for communication over distances using a system of transmission lines. RM GD07MAPhoto of Alexander Graham Bell, inventor of the telephone, talking into an early-style telephone at the opening of the New York-Chicago line. Alexander Graham Bell invented the Telephone in 1876 by joining two cups with a thread to talk from one end and listen from the other.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.DevOps Engineering - Planning to Production.Python Backend Development with Django(Live).Android App Development with Kotlin(Live).Full Stack Development with React & Node JS(Live).Java Programming - Beginner to Advanced.Data Structure & Algorithm-Self Paced(C++/JAVA).Data Structures & Algorithms in JavaScript.Data Structure & Algorithm Classes (Live). ![]()
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