For all you whippersnappers out there who never had the experience, here's a primer on how to use a rotary dial telephone. Produced by Big Brother ... I mean, the telephone company ... in the 1930s, the film explained the dial tone and busy signal to consumers used to having the operator connect their calls. Fun fact: AT&T installed the first "automatic phones" in 1915 in Norfolk, Virginia, and removed the last manual phones from the system in 1978.