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Watch The Step by Step Switch

  • Released
  • 0h 8m
  • 1951
    • 0

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Overview

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.

Production Countries

  • United States of America

Languages

No spoken languages available

Production

  • Audio Productions Inc.

Posters

No posters available