2 photographs. Top-large machine referred to as the ""switchboard"" Bottom- A large machanical machine with three large metal wheels, ""2200/Volts"" is painted on to the far right wheel.
Mrs. Duffy operates the switchboard in the main office of the Maybrook switching terminal. Caption on back of photograph: Credit - S. A. Boyer, Manager, Public Relations, The New Haven Railroad, 3611 Grand Central Terminal, New York City.