[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.]

Bronx Style [Page in Sharp's black book.]

[Sender frames, dial equipment.]

[Early types of switchboards.]

[People observing telephone operators.]

[Telephone operators.]

The Metropolitan Telephone and Telegraph Co. List of Subscribers, September 1, 1894

[Alexander Graham Bell at opening of New York - Chicago Telephone Line.]

[Telephone operators.]

[Early types of switchboards, Old Spring Exchange.]

[Telephone operators.]

[Report Center Telephonist recording Warden's message.]

[Civil defense, message room.]

[Civil defense message room.]

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Communications, Telephone Exchange.