An 1878 brochure (at left) from the New England Telephone company, "How to Make a Telephone Call," explains, with illustrations, the use of its new instrument. One of the drawings "represents a person calling attention by pressing the knob at the end of Bell Box, and turning the crank, causing the Bell at the other station to ring. When the person at the other end hears the call, he will call back; then both will turn the switches to button marked T ." As the instructions continue, "The Telephone can then be used." Of course, these early adopters began…
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