Blues Tutorial #6: Teenagers can't sing the blues. They ain't fixin' to die yet. Adults sing the blues. In blues, "adulthood" means being old enough to get the electric chair if you shoot a man in Memphis.
In 1878, switch boards were invented. This invention was created for phone companies to allow phone conversations to be had between homes. The first of these switch boards was in New Haven, Connecticut http://www.telephonymuseum.com/telephone%20history.htm