Telephone

Telephone:-

In 1875, the telephone was invented by Alexander Graham Bell, a teacher of the deaf. The telephone made real-time transmission of speech by electrical encoding and replication of sound a practical reality. The first version of the telephone was crude and weak, enabling people to talk over short distances only. When telephone service was only a few years old, interest developed in automating it. Notably, in 1897, A. B. Strowger, an undertaker from Kansas City, Missouri, devised the automatic step-by-step switch that bears his name. Of all the electromechanical switches devised over the years, the Strowger switch was the most popular and widely used.