The Step by Step Switch
Movie1951•8dk•star0.0(0)•trending_up0
Documentary
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.
Details
StatusReleased
Release DateJuly 3, 1951
Release Dates
United States:
Theatrical - Jul 3, 1951
Runtime8dk
000Origin CountryUnited States
Original LanguageEnglish
