The Step by Step Switch Filming Locations
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The Step by Step Switch Filming Locations
The Step by Step Switch (1951)
Runtime: 8 minutes
Rating:
Release year: 1951
IMDB: tt21868596
Plot summary
This AT&T informational film describes in detail how step-by-step switches work, and demonstrates their real-time operation by calling a 5-digit phone number from another dial telephone.
Genres
Documentary
Short
Cast
Directors