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.
| Release Date | July 3, 1951 | |
|---|---|---|
| Status | Released | |
| Original Title | The Step by Step Switch | |
| Runtime | 8min | |
| Budget | — | |
| Revenue | — | |
| Language | — | |
| Original Language | English | |
| Production Countries | United States of America | |
| Production Companies | Audio Productions Inc. | |