[People observing telephone operators.]
[General view of some of the dial equipment, Trafalgar Central Office.]
[Sender frames, dial equipment.]
[District selector frame in a dial exchange.]
Communications, Telephone Exchange.
Telephone, New York Telephone Co. Exchanges.
[Early types of switchboards, Old Spring Exchange.]
[Early types of switchboards.]
[General view of sender frames in a panel dial central office.]
[Man operating equipment, Radio City Music Hall.]
[Switchboard at the long distance headquarters of the American Telephone and Telegraph Company.]
[Overseas switchboard at 32 Avenue of the Americas.]
Stock Exchange [Men on the floor of the stock exchange.]
Hospitals, Roosevelt Hospital, Operating Theatre.
[Intercom and office directory for the Lord Electric Company, 333 West 49th Street]
Styles of Long Distance Instruments