[Switchboard at the long distance headquarters of the American Telephone and Telegraph Company.]
[General view of some of the dial equipment, Trafalgar Central Office.]
[District selector frame in a dial exchange.]
[Telephone operators.]
[Alexander Graham Bell at opening of New York - Chicago Telephone Line.]
Bronx Style [Page in Sharp's black book.]
[Sender frames, dial equipment.]
[Civil defense message room.]
[People observing telephone operators.]
[Early types of switchboards.]
The Metropolitan Telephone and Telegraph Co. List of Subscribers, September 1, 1894
[Early types of switchboards, Old Spring Exchange.]
[Civil defense, message room.]
[Report Center Telephonist recording Warden's message.]
Communications, Telephone Exchange.
Telephone, New York Telephone Co. Exchanges.