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.
| Title | The Step by Step Switch |
|---|---|
| Year | 1951 |
| Genre | Documentary |
| Country | United States of America |
| Studio | Audio Productions Inc. |
| Cast | |
| Crew | |
| Keyword | |
| Release | Jul 03, 1951 |
| Runtime | 8 minutes |
| Quality | HD |
| IMDb | 0.00 / 10 by 0 users |
| Popularity | 0 |
| Budget | 0 |
| Revenue | 0 |
| Language |
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